SqlHelper备份

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Text.RegularExpressions;
using System.Xml;

namespace HHTechDB
{
    public sealed class SqlHelper
    {
        public SqlHelper()
        {
            //
            //TODO: 在此处添加构造函数逻辑
            //

            //this.ConnectionString = ConfigurationManager.ConnectionStrings["connstr"].ConnectionString;
        }
        ///// <summary>
        ///// 数据库连接字符串
        ///// </summary>
        //public string ConnectionString { get; set; }

        /// <summary>
        /// 超时设置
        /// </summary>
        private const int CommandTimeOut = 6000;

        /// <summary>
        /// 批量操作每批次记录数
        /// </summary>
        public static int BatchSize = 2000;

        /// <summary>
        /// 数据库连接
        /// </summary>
        public static string cStr = "";

        #region ExecuteEmptyDataTable
        /// <summary>
        /// 获取空表结构
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="tableName">数据表名称</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteEmptyDataTable(string connectionString, string tableName)
        {
            return ExecuteDataset(connectionString, CommandType.Text, string.Format("select * from {0} where 1=-1", tableName)).Tables[0];
        }
        #endregion

        #region QueryList
        public static List<T> QueryList<T>(string sql) where T : class, new()
        {
            return QueryList<T>(cStr, sql, (SqlParameter[])null);
        }

        public static List<T> QueryList<T>(string sql,string[,] para) where T : class, new()
        {
            return QueryList<T>(cStr,sql, para);
        }

        public static List<T> QueryList<T>(string conn,string sql) where T : class, new()
        {
            return QueryList<T>(conn, sql, (SqlParameter[])null);
        }

        public static List<T> QueryList<T>(string conn, string sql,string[,] para) where T:class,new()
        {
            // 实例化一个List<> 泛型集合
            //List<T> DataList = null;
            //IDataReader reader = ExecuteReader(conn, sql,para);


            //while (reader.Read())
            //{
            //    T RowInstance = Activator.CreateInstance<T>();//动态创建数据实体对象  
            //    //通过反射取得对象所有的Property  
            //    foreach (PropertyInfo Property in typeof(T).GetProperties())
            //    {
            //        try
            //        {
            //            //取得当前数据库字段的顺序  
            //            int Ordinal = reader.GetOrdinal(Property.Name);
            //            if (reader.GetValue(Ordinal) != DBNull.Value)
            //            {
            //                //将DataReader读取出来的数据填充到对象实体的属性里  
            //                Property.SetValue(RowInstance, Convert.ChangeType(reader.GetValue(Ordinal), Property.PropertyType), null);
            //            }
            //        }
            //        catch(Exception ex)
            //        {
            //            HHTech.Log.Error("数据库运行错误！" + sql, ex);
            //            break;
            //        }
            //    }
            //    DataList.Add(RowInstance);
            //}
            //return DataList;
            return new ModelHandler<T>().FillModel(ExecuteDataTable(conn, sql, para));

            
        }

        public static List<T> QueryList<T>(string conn, string sql, params SqlParameter[] para) where T : class, new()
        {
            return new ModelHandler<T>().FillModel(ExecuteDataTable(conn, CommandType.Text, sql, para));
            //IDataReader reader = ExecuteReader(conn, sql, para);
            ////实例化一个List<>泛型集合  
            //List<T> DataList = new List<T>();
            //while (reader.Read())
            //{
            //    T RowInstance = Activator.CreateInstance<T>();//动态创建数据实体对象  
            //    //通过反射取得对象所有的Property  
            //    foreach (PropertyInfo Property in typeof(T).GetProperties())
            //    {
            //        try
            //        {
            //            //取得当前数据库字段的顺序  
            //            int Ordinal = reader.GetOrdinal(Property.Name);
            //            if (reader.GetValue(Ordinal) != DBNull.Value)
            //            {
            //                //将DataReader读取出来的数据填充到对象实体的属性里  
            //                Property.SetValue(RowInstance, Convert.ChangeType(reader.GetValue(Ordinal), Property.PropertyType), null);
            //            }
            //        }
            //        catch (Exception ex)
            //        {
            //            HHTech.Log.Error("数据库运行错误！" + sql, ex);
            //            break;
            //        }
            //    }
            //    DataList.Add(RowInstance);
            //}
            //return DataList;
        }
        #endregion


        #region 私有构造函数和方法

        /// <summary>
        /// 将SqlParameters参数数组（参数值）分配给SqlCommand命令
        /// 这个方法将给任何一个参数分配DBNull.Value
        /// 该操作将阻止默认值的使用（大爷的，没看懂）
        /// </summary>
        /// <param name="command">要分配SqlParameters参数的SqlCommand命令</param>
        /// <param name="commandParameters">SqlParameters参数数组</param>
        private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters)
        {
            if (command == null) throw new ArgumentNullException("command");
            if (commandParameters != null)
            {
                foreach (SqlParameter p in commandParameters)
                {
                    if (p != null)
                    {
                        // Check for derived output value with no value assigned
                        if ((p.Direction == ParameterDirection.InputOutput ||
                            p.Direction == ParameterDirection.Input) &&
                            (p.Value == null))
                        {
                            p.Value = DBNull.Value;
                        }
                        command.Parameters.Add(p);
                    }
                }
            }
        }

        #region 自己添加函数
        //================自己添加函数=====================
        private static string NullToStr(string str)
        {
            if (str == null)
            {
                return "";
            }
            return str;
        }

        /// <summary>
        /// 将SqlParameters参数数组（参数值）分配给SqlCommand命令
        /// 这个方法将给任何一个参数分配DBNull.Value
        /// 该操作将阻止默认值的使用（大爷的，没看懂）
        /// </summary>
        /// <param name="command">要分配SqlParameters参数的SqlCommand命令</param>
        /// <param name="para">
        ///     string2维数组
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        private static void AttachParameters(SqlCommand command, string[,] para)
        {
            if (command == null) throw new ArgumentNullException("command");

            if (para != null)
            {
                SqlParameter p;
                int wssx = para.GetLength(1);    //得到维数的上限 1=2个 2=3个

                //para 是一个二维数组，
                //para.GetLength(0) 获得第一维的长度（行数），para.GetLength(1)获得第二维的长度（列数）。
                //int wssx1 = para.Rank;
                for (int i = 0; i < para.GetLength(0); i++)
                {
                    if (para[i, 1] == null) //|| para[i, 1] == ""
                    {
                        p = new SqlParameter(para[i, 0], System.DBNull.Value);
                    }
                    else
                    {
                        p = new SqlParameter(para[i, 0], NullToStr(para[i, 1]));
                    }


                    if (wssx == 3 && para[i, 2] != "")
                    {
                        //ParameterDirection.Input
                        //ParameterDirection.InputOutput
                        //ParameterDirection.Output
                        //ParameterDirection.ReturnValue
                        switch (para[i, 2])
                        {
                            case "Input":
                                p.Direction = ParameterDirection.Input;
                                break;
                            case "InputOutput":
                                p.Direction = ParameterDirection.InputOutput;
                                break;
                            case "Output":
                                p.Direction = ParameterDirection.Output;
                                break;
                            case "ReturnValue":
                                p.Direction = ParameterDirection.ReturnValue;
                                break;
                        }
                    }


                    command.Parameters.Add(p);
                }
            }
        }
        //================自己添加函数=====================
        #endregion


        /// <summary>
        /// 将DataRow类型的列值分配到SqlParameter参数数组
        /// </summary>
        /// <param name="commandParameters">要分配的SqlParameter参数数组</param>
        /// <param name="dataRow">将要分配给存储过程参数的DataRow</param>
        private static void AssignParameterValues(SqlParameter[] commandParameters, DataRow dataRow)
        {
            if ((commandParameters == null) || (dataRow == null))
            {
                // 没有接收到数据就返回
                return;
            }

            int i = 0;
            // 设置参数值
            foreach (SqlParameter commandParameter in commandParameters)
            {
                // 检查参数名称，如果不存在，抛出一个异常
                if (commandParameter.ParameterName == null ||
                    commandParameter.ParameterName.Length <= 1)
                    throw new Exception(
                        string.Format(
                            "请提供参数{0},一个有效的名称{1}.",
                            i, commandParameter.ParameterName));
                // 从DataRow的表中获取为参数数组中数组名称的列的索引.
                // 如果存在和参数名称相同的列,则将列值赋给当前名称的参数.
                if (dataRow.Table.Columns.IndexOf(commandParameter.ParameterName.Substring(1)) != -1)
                    commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];
                i++;
            }
        }

        /// <summary>
        /// 将一个对象数组分配给SqlParameter参数数组.（重载方法）
        /// </summary>
        /// <param name="commandParameters">要分配的SqlParameter参数数组</param>
        /// <param name="parameterValues">将要分配给存储过程参数的对象数组</param>
        private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues)
        {
            if ((commandParameters == null) || (parameterValues == null))
            {
                return;
            }

            // 确保对象数组个数与参数个数匹配,如果不匹配,抛出一个异常
            if (commandParameters.Length != parameterValues.Length)
            {
                throw new ArgumentException("参数值个数与参数不匹配.");
            }

            // 给参数赋值
            for (int i = 0, j = commandParameters.Length; i < j; i++)
            {
                if (parameterValues[i] is IDbDataParameter)
                {
                    IDbDataParameter paramInstance = (IDbDataParameter)parameterValues[i];
                    if (paramInstance.Value == null)
                    {
                        commandParameters[i].Value = DBNull.Value;
                    }
                    else
                    {
                        commandParameters[i].Value = paramInstance.Value;
                    }
                }
                else if (parameterValues[i] == null)
                {
                    commandParameters[i].Value = DBNull.Value;
                }
                else
                {
                    commandParameters[i].Value = parameterValues[i];
                }
            }
        }

        /// <summary>
        /// 预处理用户提供的命令,数据库连接/事务/命令类型/参数
        /// </summary>
        /// <param name="command">要处理的SqlCommand</param>
        /// <param name="connection">有效的数据库连接</param>
        /// <param name="transaction">一个有效的事务或者是null值</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">存储过程名或都T-SQL命令文本</param>
        /// <param name="commandParameters">和命令相关联的SqlParameter参数数组,如果没有参数为'null'</param>
        /// <param name="mustCloseConnection"><c>true</c> 如果连接是打开的,则为true,其它情况下为false.</param>
        private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, out bool mustCloseConnection)
        {
            //IntelnetConnState.HasNetworkAlive();
            if (command == null) throw new ArgumentNullException("command");
            if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");

            if (connection.State != ConnectionState.Open)
            {

                mustCloseConnection = true;
                connection.Open();
            }
            else
            {
                mustCloseConnection = false;
            }

            command.CommandTimeout = 1000*10;//1000 * 60 * 60; // 60分钟
            // 给命令分配一个数据库连接.
            command.Connection = connection;
            // 设置命令文本(存储过程名或SQL语句)
            command.CommandText = commandText;
            // 分配事务
            if (transaction != null)
            {
                if (transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
                command.Transaction = transaction;
            }

            // 设置命令类型.
            command.CommandType = commandType;

            // 分配命令参数
            if (commandParameters != null)
            {
                AttachParameters(command, commandParameters);
            }
            return;
        }


        /// <summary>
        /// 预处理用户提供的命令,数据库连接/事务/命令类型/参数
        /// </summary>
        /// <param name="command">要处理的SqlCommand</param>
        /// <param name="connection">有效的数据库连接</param>
        /// <param name="transaction">一个有效的事务或者是null值</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">存储过程名或都T-SQL命令文本</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <param name="mustCloseConnection"><c>true</c> 如果连接是打开的,则为true,其它情况下为false.</param>
        private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, string[,] para, out bool mustCloseConnection)
        {
            if (command == null) throw new ArgumentNullException("command");
            if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");
            //IntelnetConnState.HasNetworkAlive();
            if (connection.State != ConnectionState.Open)
            {
                mustCloseConnection = true;
                connection.Open();
            }
            else
            {
                mustCloseConnection = false;
            }

            command.CommandTimeout = 1000 * 60 * 6; // 6分钟

            // 给命令分配一个数据库连接.
            command.Connection = connection;

            // 设置命令文本(存储过程名或SQL语句)
            command.CommandText = commandText;

            // 分配事务
            if (transaction != null)
            {
                if (transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
                command.Transaction = transaction;
            }

            // 设置命令类型.
            command.CommandType = commandType;

            // 分配命令参数
            if (para != null)
            {
                AttachParameters(command, para);
            }
            return;
        }

        #endregion 私有构造函数和方法结束


        #region ExecuteNonQuery命令

        /// <summary>
        /// 执行指定连接字符串,类型的SqlCommand.如果没有提供参数,不返回结果
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int result = ExecuteNonQuery(sql);
        /// </remarks>
        /// <param name="commandText">存储过程名称或SQL语句</param>
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回命令影响的行数</retTurns>
        public static int ExecuteNonQuery(string commandText, SqlParameter[] paras = null)
        {
            // ExecuteNonQuery #2
            //if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");

            using (SqlConnection connection = new SqlConnection(cStr))
            {
                connection.Open();
                return ExecuteNonQuery(connection, CommandType.Text, commandText, paras);
            }
        }

        /// <summary>
        /// 执行指定连接字符串,类型的SqlCommand.如果没有提供参数,不返回结果
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery( sql,para);
        /// </remarks>
        /// <param name="commandText">存储过程名称或SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回命令影响的行数</retTurns>
        public static int ExecuteNonQuery(string commandText, string[,] para)
        {
            // ExecuteNonQuery #2
            //if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");

            using (SqlConnection connection = new SqlConnection(cStr))
            {

                connection.Open();
                return ExecuteNonQuery(connection, CommandType.Text, commandText, para);
            }
        }

        /// <summary>
        /// 执行指定连接字符串,类型的SqlCommand.
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">存储过程名称或SQL语句</param>
        /// <returns>返回命令影响的行数</returns>
        public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText)
        {
            // ExecuteNonQuery #1
            return ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定连接字符串,类型的SqlCommand.如果没有提供参数,不返回结果
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">存储过程名称或SQL语句</param>
        /// <param name="commandParameters">SqlParameter参数数组</param>
        /// <returns>返回命令影响的行数</returns>
        public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteNonQuery #2
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                return ExecuteNonQuery(connection, commandType, commandText, commandParameters);
            }
        }



        /// <summary>
        /// 执行指定连接字符串,类型的SqlCommand.如果没有提供参数,不返回结果
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders",para);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">存储过程名称或SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回命令影响的行数</returns>
        public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteNonQuery #2
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                return ExecuteNonQuery(connection, commandType, commandText, para);
            }
        }

        /// <summary>
        /// 执行指定连接字符串的存储过程,将对象数组的值赋给存储过程参数.
        /// 此方法需要在参数缓存方法中探索参数并生成参数.
        /// </summary>
        /// <remarks>
        /// 这个方法没有提供访问输出参数和返回值.
        /// 示例:  
        /// int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="parameterValues">分配到存储过程输入参数的对象数组</param>
        /// <returns>返回受影响的行数</returns>
        public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues)
        {
            // ExecuteNonQuery #3
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果存在参数值，我们要搞清楚他们去哪里
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从探索存储过程参数(加载到缓存)并分配给存储过程参数数组.
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);

                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);

                return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // 没有参数情况下
                return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令. 
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText)
        {
            // ExecuteNonQuery #4
            return ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>
        /// <param name="commandText">T存储过程名称或T-SQL语句</param>
        /// <param name="commandParameters">SqlParamter参数数组</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteNonQuery #5
            if (connection == null) throw new ArgumentNullException("connection");

            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);

            int retval = cmd.ExecuteNonQuery();

            cmd.Parameters.Clear();
            if (mustCloseConnection)
                connection.Close();
            return retval;
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(conn, CommandType.Text, sql, para);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>
        /// <param name="commandText">T存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     string2维数组
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteNonQuery #6
            if (connection == null) throw new ArgumentNullException("connection");

            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            //cmd.CommandTimeout = 1000 * 60;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, para, out mustCloseConnection);

            int retval = cmd.ExecuteNonQuery();

            cmd.Parameters.Clear();
            if (mustCloseConnection)
                connection.Close();
            return retval;
        }



        /// <summary>
        /// 执行指定数据库连接对象的命令,将对象数组的值赋给存储过程参数.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值
        /// 示例:  
        /// int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlConnection connection, string spName, params object[] parameterValues)
        {
            // ExecuteNonQuery #6
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 给存储过程分配参数值
                AssignParameterValues(commandParameters, parameterValues);

                return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行带事务的SqlCommand. 
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
        /// </remarks>
        /// <param name="transaction">一个有效的事物</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlTransaction transaction, string commandText)
        {
            // ExecuteNonQuery #7
            return ExecuteNonQuery(transaction, CommandType.Text, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行带事务的SqlCommand. 
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
        /// </remarks>
        /// <param name="transaction">一个有效的事物</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText)
        {
            // ExecuteNonQuery #7
            return ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行带事务的SqlCommand(指定参数).
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">一个有效的数据库事物</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="commandParameters">SqlParamter参数数组</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            int retval = 0;
            try
            { 
            // ExecuteNonQuery #8
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            //预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // 执行
            retval = cmd.ExecuteNonQuery();

            // 清除参数集,以便再次使用
            cmd.Parameters.Clear();
            }
            catch(Exception ex)
            {
                HHTech.Log.Error("数据库运行错误！" + commandText, ex);
            }
            return retval;
        }

        /// <summary>
        /// 执行带事务的SqlCommand(指定参数).
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="transaction">一个有效的数据库事物</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     string2维数组
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlTransaction transaction, string commandText, string[,] para)
        {
            return ExecuteNonQuery(transaction, CommandType.Text, commandText, para);
        }

        /// <summary>
        /// 执行带事务的SqlCommand(指定参数).
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="transaction">一个有效的数据库事物</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     string2维数组
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, string[,] para)
        {
            int retval = 0;
            try
            {
                // ExecuteNonQuery #8
                if (transaction == null) throw new ArgumentNullException("transaction");
                if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

                //预处理
                SqlCommand cmd = new SqlCommand();
                cmd.CommandTimeout = CommandTimeOut;
                bool mustCloseConnection = false;
                PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, para, out mustCloseConnection);

                // 执行
                retval = cmd.ExecuteNonQuery();

                // 清除参数集,以便再次使用
                cmd.Parameters.Clear();
            }
            catch (Exception ex)
            {
                HHTech.Log.Error("数据库运行错误！" + commandText, ex);
            }
            return retval;
        }

        /// <summary>
        /// 执行带事务的SqlCommand(指定参数值).
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值
        /// 示例:  
        /// int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);
        /// </remarks>
        /// <param name="transaction">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回受影响的行数</returns>
        public static int ExecuteNonQuery(SqlTransaction transaction, string spName, params object[] parameterValues)
        {
            // ExecuteNonQuery #9
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中.
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);

                // 调用重载方法
                return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // 没有参数值
                return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteNonQuery命令



        #region ExecuteDataRow
        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行
        /// </summary>
        /// <param name="sql">SQL语句</param>
        /// <returns>,返回结果集中的第一行</returns>
        public static DataRow ExecuteDataRow(string sql)
        {
            DataTable dt = ExecuteDataTable(sql);
            return dt.Rows.Count > 0 ? dt.Rows[0] : null;
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行
        /// </summary>
        /// <param name="sql">SQL语句</param>
        /// <param name="para">参数</param>
        /// <returns>,返回结果集中的第一行</returns>
        public static DataRow ExecuteDataRow(string sql, string[,] para)
        {
            DataTable dt = ExecuteDataTable(sql,para);
            return dt.Rows.Count > 0 ? dt.Rows[0] : null;
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行
        /// </summary>
        /// <param name="conn">数据库连接字符串</param>
        /// <param name="sql">SQL语句或存储过程名称</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataRow ExecuteDataRow(string conn, string sql)
        {
            DataTable dt = ExecuteDataTable(conn,sql);
            return dt.Rows.Count > 0 ? dt.Rows[0] : null;
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行
        /// </summary>
        /// <param name="conn">数据库连接字符串</param>
        /// <param name="sql">SQL语句或存储过程名称</param>
        /// <param name="para">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataRow ExecuteDataRow(string conn, string sql, string[,] para)
        {
            DataTable dt = ExecuteDataTable(conn,sql, para);
            return dt.Rows.Count > 0 ? dt.Rows[0] : null;
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="commandType">命令类型(存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">SQL语句或存储过程名称</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataRow ExecuteDataRow(string connectionString, CommandType commandType, string commandText, string[,] parms)
        {
            DataTable dt = ExecuteDataTable(connectionString, commandType, commandText, parms);
            return dt.Rows.Count > 0 ? dt.Rows[0] : null;
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行
        /// </summary>
        /// <param name="connection">数据库连接</param>
        /// <param name="commandType">命令类型(存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">SQL语句或存储过程名称</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataRow ExecuteDataRow(SqlConnection connection, CommandType commandType, string commandText, string[,] parms)
        {
            DataTable dt = ExecuteDataTable(connection, commandType, commandText, parms);
            return dt.Rows.Count > 0 ? dt.Rows[0] : null;
        }


        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="commandType">命令类型(存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">SQL语句或存储过程名称</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataRow ExecuteDataRow(string connectionString, CommandType commandType, string commandText, params SqlParameter[] parms)
        {
            DataTable dt = ExecuteDataTable(connectionString, commandType, commandText, parms);
            return dt.Rows.Count > 0 ? dt.Rows[0] : null;
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行
        /// </summary>
        /// <param name="connection">数据库连接</param>
        /// <param name="commandType">命令类型(存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">SQL语句或存储过程名称</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataRow ExecuteDataRow(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] parms)
        {
            DataTable dt = ExecuteDataTable(connection, commandType, commandText, parms);
            return dt.Rows.Count > 0 ? dt.Rows[0] : null;
        }

        #endregion

        #region ExecuteDataTable
        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="sql">SQL语句或存储过程名称</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(string sql)
        {
            return ExecuteDataset(sql).Tables[0];
        }
        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="sql">SQL语句或存储过程名称</param>
        /// <param name="para">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(string sql,string[,] para)
        {
            return ExecuteDataset(sql,para).Tables[0];
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="conn">数据库连接字符串</param>
        /// <param name="sql">SQL语句或存储过程名称</param>
        /// <param name="type">执行的是储存过程还是sql语句</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(string conn,string sql, CommandType type)
        {
            return ExecuteDataset(conn,sql, type).Tables[0];
        }


        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="conn">数据库连接字符串</param>
        /// <param name="sql">SQL语句或存储过程名称</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(string conn, string sql)
        {
            return ExecuteDataset(conn, sql).Tables[0];
        }
        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="conn">数据库连接字符串</param>
        /// <param name="sql">SQL语句或存储过程名称</param>
        /// <param name="para">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(string conn, string sql,string[,] para)
        {
            return ExecuteDataset(conn, sql, para).Tables[0];
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="commandType">命令类型(存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">SQL语句或存储过程名称</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText, string[,] parms)
        {
            return ExecuteDataset(connectionString, commandType, commandText, parms).Tables[0];
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="connection">数据库连接</param>
        /// <param name="commandType">命令类型(存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">SQL语句或存储过程名称</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(SqlConnection connection, CommandType commandType, string commandText, string[,] parms)
        {
            return ExecuteDataset(connection, commandType, commandText, parms).Tables[0];
        }


        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="commandType">命令类型(存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">SQL语句或存储过程名称</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText, params SqlParameter[] parms)
        {
            return ExecuteDataset(connectionString, commandType, commandText, parms).Tables[0];
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一个数据表
        /// </summary>
        /// <param name="connection">数据库连接</param>
        /// <param name="commandType">命令类型(存储过程,命令文本, 其它.)</param>
        /// <param name="commandText">SQL语句或存储过程名称</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一个数据表</returns>
        public static DataTable ExecuteDataTable(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] parms)
        {
            return ExecuteDataset(connection, commandType, commandText, parms).Tables[0];
        }

        #endregion


        #region ExecuteDataset方法

        /// <summary>
        /// 执行指定数据库连接字符串的命令,返回DataSet. 
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(sql);
        /// </remarks>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(string commandText)
        {
            // ExecuteDataset #1
            return ExecuteDataset(cStr, CommandType.Text, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(sql, para);
        /// </remarks>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(string commandText, string[,] para)
        {
            using (SqlConnection connection = new SqlConnection(cStr))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                return ExecuteDataset(connection, CommandType.Text, commandText, para);
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,返回DataSet. 
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText)
        {
            // ExecuteDataset #1
            return ExecuteDataset(connectionString, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="commandParameters">SqlParamters参数数组</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteDataset #2
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                return ExecuteDataset(connection, commandType, commandText, commandParameters);
            }
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,指定存储过程参数,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlConnection connection, string commandText, string[,] para)
        {
            return ExecuteDataset(connection, commandText, para);
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,指定存储过程参数,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteDataset #5
            if (connection == null) throw new ArgumentNullException("connection");

            // 预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, para, out mustCloseConnection);

            // 创建SqlDataAdapter和DataSet.
            using (SqlDataAdapter da = new SqlDataAdapter(cmd))
            {
                DataSet ds = new DataSet();
                // 填充DataSet.
                da.Fill(ds);
                cmd.Parameters.Clear();
                if (mustCloseConnection)
                    connection.Close();
                return ds;
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(string connectionString, string commandText, string[,] para)
        {
            return ExecuteDataset(connectionString, CommandType.Text, commandText, para);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型(存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteDataset #2
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                return ExecuteDataset(connection, commandType, commandText, para);
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,直接提供参数值,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值.
        /// 示例:  
        /// DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues)
        {
            // ExecuteDataset #3
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中检索存储过程参数
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);

                // 给存储过程参数分配值
                AssignParameterValues(commandParameters, parameterValues);
                return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
            }
        }


        /// <summary>
        /// 执行指定数据库连接字符串的命令,直接提供参数值,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值.
        /// 示例:  
        /// DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <param name="type">执行的是储存过程还是sql语句</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(string connectionString, string spName, CommandType type, params object[] parameterValues)
        {
            // ExecuteDataset #3
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中检索存储过程参数
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);

                // 给存储过程参数分配值
                AssignParameterValues(commandParameters, parameterValues);
                return ExecuteDataset(connectionString, type, spName, commandParameters);
            }
            else
            {
                return ExecuteDataset(connectionString, type, spName);
            }
        }


        /// <summary>
        /// 执行指定数据库连接对象的命令,返回DataSet. 
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText)
        {
            // ExecuteDataset #4
            return ExecuteDataset(connection, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,指定存储过程参数,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例:  
        /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="commandParameters">SqlParamter参数数组</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteDataset #5
            if (connection == null) throw new ArgumentNullException("connection");

            // 预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);

            // 创建SqlDataAdapter和DataSet.
            using (SqlDataAdapter da = new SqlDataAdapter(cmd))
            {
                DataSet ds = new DataSet();
                // 填充DataSet.
                da.Fill(ds);
                cmd.Parameters.Clear();
                if (mustCloseConnection)
                    connection.Close();
                return ds;
            }
        }

        

        /// <summary>
        /// 执行指定数据库连接对象的命令,指定参数值,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输入参数和返回值.
        /// 示例.: 
        ///  DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlConnection connection, string spName, params object[] parameterValues)
        {
            // ExecuteDataset #6
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 比缓存中加载存储过程参数
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);
                // 给存储过程参数分配值
                AssignParameterValues(commandParameters, parameterValues);
                return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteDataset(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定事务的命令,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="transaction">事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlTransaction transaction, string commandText)
        {
            // ExecuteDataset #7
            return ExecuteDataset(transaction, CommandType.Text, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定事务的命令,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="transaction">事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlTransaction transaction, string commandText, string[,] para)
        {
            // ExecuteDataset #7
            return ExecuteDataset(transaction, CommandType.Text, commandText, para);
        }

        /// <summary>
        /// 执行指定事务的命令,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="transaction">事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText)
        {
            // ExecuteDataset #7
            return ExecuteDataset(transaction, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定事务的命令,指定参数,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="commandParameters">SqlParamter参数数组</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteDataset #8
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            // 预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // 创建 DataAdapter & DataSet
            using (SqlDataAdapter da = new SqlDataAdapter(cmd))
            {
                DataSet ds = new DataSet();
                da.Fill(ds);
                cmd.Parameters.Clear();
                return ds;
            }
        }

        /// <summary>
        /// 执行指定事务的命令,指定参数,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="transaction">事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteDataset #8
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            // 预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, para, out mustCloseConnection);

            // 创建 DataAdapter & DataSet
            using (SqlDataAdapter da = new SqlDataAdapter(cmd))
            {
                DataSet ds = new DataSet();
                da.Fill(ds);
                cmd.Parameters.Clear();
                return ds;
            }
        }

        /// <summary>
        /// 执行指定事务的命令,指定参数值,返回DataSet.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输入参数和返回值.
        /// 示例.: 
        ///  DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="transaction">事务</param>
        /// <param name="spName">存储过程名</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回一个包含结果集的DataSet</returns>
        public static DataSet ExecuteDataset(SqlTransaction transaction, string spName, params object[] parameterValues)
        {
            // ExecuteDataset #9
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);
                // 给存储过程参数分配值
                AssignParameterValues(commandParameters, parameterValues);
                return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteDataset方法


        #region ExecuteReader 数据阅读器
        /// <summary>
        /// 枚举,标识数据库连接是由SqlHelper提供还是由调用者提供
        /// </summary>
        private enum SqlConnectionOwnership
        {
            /// <summary>由SqlHelper提供连接</summary>
            Internal,
            /// <summary>由调用者提供连接</summary>
            External
        }

        /// <summary>
        /// 执行指定数据库连接对象的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 如果是SqlHelper打开连接,当连接关闭DataReader也将关闭.
        /// 如果是调用都打开连接,DataReader由调用都管理.
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="transaction">一个有效的事务,或者为 'null'</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="commandParameters">SqlParameters参数数组,如果没有参数则为'null'</param>
        /// <param name="connectionOwnership">标识数据库连接对象是由调用者提供还是由SqlHelper提供</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        private static SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership)
        {
            // ExecuteReader #1
            if (connection == null) throw new ArgumentNullException("connection");
            bool mustCloseConnection = false;
            // 创建命令
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            try
            {
                PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
                // 创建数据阅读器
                SqlDataReader dataReader;
                if (connectionOwnership == SqlConnectionOwnership.External)
                {
                    dataReader = cmd.ExecuteReader();
                }
                else
                {
                    dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                }

                // 清除参数,以便再次使用..
                // HACK: There is a problem here, the output parameter values are fletched
                // when the reader is closed, so if the parameters are detached from the command
                // then the SqlReader can磘 set its values.
                // When this happen, the parameters can磘 be used again in other command.
                bool canClear = true;
                foreach (SqlParameter commandParameter in cmd.Parameters)
                {
                    if (commandParameter.Direction != ParameterDirection.Input)
                        canClear = false;
                }

                if (canClear)
                {
                    cmd.Parameters.Clear();
                }
                return dataReader;
            }

            catch
            {
                if (mustCloseConnection)
                    connection.Close();
                throw;
            }
        }

        /// <summary>
        /// 执行指定数据库连接对象的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 如果是SqlHelper打开连接,当连接关闭DataReader也将关闭.
        /// 如果是调用都打开连接,DataReader由调用都管理.
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="transaction">一个有效的事务,或者为 'null'</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <param name="connectionOwnership">标识数据库连接对象是由调用者提供还是由SqlHelper提供</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        private static SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, string[,] para, SqlConnectionOwnership connectionOwnership)
        {
            // ExecuteReader #1
            if (connection == null) throw new ArgumentNullException("connection");
            bool mustCloseConnection = false;
            // 创建命令
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            try
            {
                PrepareCommand(cmd, connection, transaction, commandType, commandText, para, out mustCloseConnection);
               
                // 创建数据阅读器
                SqlDataReader dataReader;
                if (connectionOwnership == SqlConnectionOwnership.External)
                {
                    dataReader = cmd.ExecuteReader();
                }
                else
                {
                    dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                }

                // 清除参数,以便再次使用..
                // HACK: There is a problem here, the output parameter values are fletched
                // when the reader is closed, so if the parameters are detached from the command
                // then the SqlReader can磘 set its values.
                // When this happen, the parameters can磘 be used again in other command.
                bool canClear = true;
                foreach (SqlParameter commandParameter in cmd.Parameters)
                {
                    if (commandParameter.Direction != ParameterDirection.Input)
                        canClear = false;
                }

                if (canClear)
                {
                    cmd.Parameters.Clear();
                }
                return dataReader;
            }

            catch
            {
                if (mustCloseConnection)
                    connection.Close();
                throw;
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(connString, sql);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(string connectionString, string commandText)
        {
            // ExecuteReader #2
            return ExecuteReader(connectionString, CommandType.Text, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(sql);
        /// </remarks>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(string commandText)
        {
            // ExecuteReader #2
            return ExecuteReader(cStr, CommandType.Text, commandText, (SqlParameter[])null);
        }


        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(connString, sql);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(string connectionString, string commandText, string[,] para)
        {
            // ExecuteReader #2
            return ExecuteReader(connectionString, CommandType.Text, commandText, para);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(connString, sql);
        /// </remarks>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader( string commandText, string[,] para)
        {
            // ExecuteReader #2
            return ExecuteReader(cStr, CommandType.Text, commandText, para);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader( CommandType commandType, string commandText)
        {
            // ExecuteReader #2
            return ExecuteReader(cStr, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText)
        {
            // ExecuteReader #2
            return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        ///  SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="commandParameters">SqlParamter参数数组(new SqlParameter("@prodid", 24))</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteReader #3
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            SqlConnection connection = null;
            try
            {
                //IntelnetConnState.HasNetworkAlive();
                connection = new SqlConnection(connectionString);
                connection.Open();
                return ExecuteReader(connection, null, commandType, commandText, commandParameters, SqlConnectionOwnership.Internal);
            }
            catch
            {
                if (connection != null) connection.Close();
                throw;
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        ///  SqlDataReader dr = ExecuteReader( CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteReader #3
            if (cStr == null || cStr.Length == 0) throw new ArgumentNullException("connectionString");
            SqlConnection connection = null;
            try
            {
                //IntelnetConnState.HasNetworkAlive();
                connection = new SqlConnection(cStr);
                connection.Open();
                return ExecuteReader(connection, null, commandType, commandText, para, SqlConnectionOwnership.Internal);
            }
            catch
            {
                if (connection != null) connection.Close();
                throw;
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        ///  SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteReader #3
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            SqlConnection connection = null;
            try
            {
                //IntelnetConnState.HasNetworkAlive();
                connection = new SqlConnection(connectionString);
                connection.Open();
                return ExecuteReader(connection, null, commandType, commandText, para, SqlConnectionOwnership.Internal);
            }
            catch
            {
                if (connection != null) connection.Close();
                throw;
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的数据阅读器,指定参数值.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues)
        {
            // ExecuteReader #4
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);
                AssignParameterValues(commandParameters, parameterValues);
                return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteReader(connectionString, CommandType.Text, spName);
            }
        }

        /// <summary>
        /// 执行指定数据库连接对象的数据阅读器.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText)
        {
            // ExecuteReader #5
            return ExecuteReader(connection, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// [调用者方式]执行指定数据库连接对象的数据阅读器,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="commandParameters">SqlParamter参数数组</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteReader #6
            return ExecuteReader(connection, (SqlTransaction)null, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
        }

        /// <summary>
        /// [调用者方式]执行指定数据库连接对象的数据阅读器,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteReader #6
            return ExecuteReader(connection, (SqlTransaction)null, commandType, commandText, para, SqlConnectionOwnership.External);
        }

        /// <summary>
        /// [调用者方式]执行指定数据库连接对象的数据阅读器,指定参数值.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">T存储过程名</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(SqlConnection connection, string spName, params object[] parameterValues)
        {
            // ExecuteReader #7
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);
                AssignParameterValues(commandParameters, parameterValues);
                return ExecuteReader(connection, CommandType.Text, spName, commandParameters);
            }
            else
            {
                return ExecuteReader(connection, CommandType.Text, spName);
            }
        }

        /// <summary>
        /// [调用者方式]执行指定数据库事务的数据阅读器,指定参数值.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText)
        {
            // ExecuteReader #8
            return ExecuteReader(transaction, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// [调用者方式]执行指定数据库事务的数据阅读器,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        ///  SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteReader #9
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
        }

        /// <summary>
        /// [调用者方式]执行指定数据库事务的数据阅读器,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        ///  SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteReader #9
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            return ExecuteReader(transaction.Connection, transaction, commandType, commandText, para, SqlConnectionOwnership.External);
        }

        /// <summary>
        /// [调用者方式]执行指定数据库事务的数据阅读器,指定参数值.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// SqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(SqlTransaction transaction, string spName, params object[] parameterValues)
        {
            // ExecuteReader #10
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);
                AssignParameterValues(commandParameters, parameterValues);
                return ExecuteReader(transaction, CommandType.Text, spName, commandParameters);
            }
            else
            {
                // 没有参数值
                return ExecuteReader(transaction, CommandType.Text, spName);
            }
        }

        #endregion ExecuteReader 数据阅读器


        #region ExecuteScalar 返回结果集中的第一行第一列

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行第一列
        /// </summary>
        /// <typeparam name="T">返回对象类型</typeparam>
        /// <param name="commandText">SQL语句</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static T ExecuteScalar<T>(string commandText)
        {
            object result = ExecuteScalar(cStr, commandText, (SqlParameter[])null);
            if (result != null)
            {
                return (T)Convert.ChangeType(result, typeof(T)); ;
            }
            return default(T);
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行第一列
        /// </summary>
        /// <typeparam name="T">返回对象类型</typeparam>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="commandText">SQL语句</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static T ExecuteScalar<T>(string connectionString, string commandText)
        {
            object result = ExecuteScalar(connectionString, commandText, (SqlParameter[])null);
            if (result != null)
            {
                return (T)Convert.ChangeType(result, typeof(T)); ;
            }
            return default(T);
        }




        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行第一列
        /// </summary>
        /// <typeparam name="T">返回对象类型</typeparam>
        /// <param name="commandText">SQL语句</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static T ExecuteScalar<T>(string commandText, params SqlParameter[] parms)
        {
            object result = ExecuteScalar(cStr, commandText, parms);
            if (result != null)
            {
                return (T)Convert.ChangeType(result, typeof(T)); ;
            }
            return default(T);
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行第一列
        /// </summary>
        /// <typeparam name="T">返回对象类型</typeparam>
        /// <param name="commandText">SQL语句</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static T ExecuteScalar<T>( string commandText, string[,] parms)
        {
            object result = ExecuteScalar(cStr, commandText, parms);
            if (result != null)
            {
                return (T)Convert.ChangeType(result, typeof(T)); ;
            }
            return default(T);
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行第一列
        /// </summary>
        /// <typeparam name="T">返回对象类型</typeparam>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="commandText">SQL语句</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static T ExecuteScalar<T>(string connectionString, string commandText, params SqlParameter[] parms)
        {
            object result = ExecuteScalar(connectionString, commandText, parms);
            if (result != null)
            {
                return (T)Convert.ChangeType(result, typeof(T)); ;
            }
            return default(T);
        }

        /// <summary>
        /// 执行SQL语句,返回结果集中的第一行第一列
        /// </summary>
        /// <typeparam name="T">返回对象类型</typeparam>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="commandText">SQL语句</param>
        /// <param name="parms">查询参数</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static T ExecuteScalar<T>(string connectionString, string commandText, string[,] parms)
        {
            object result = ExecuteScalar(connectionString, commandText, parms);
            if (result != null)
            {
                return (T)Convert.ChangeType(result, typeof(T)); ;
            }
            return default(T);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
        /// </remarks>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(string commandText)
        {
            // ExecuteScalar #1
            // 执行参数为空的方法
            return ExecuteScalar(cStr, CommandType.Text, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,指定参数,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", para);
        /// </remarks>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(string commandText, string[,] para)
        {
            // ExecuteScalar #1
            // 执行参数为空的方法
            return ExecuteScalar(cStr, CommandType.Text, commandText, para);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText)
        {
            // ExecuteScalar #1
            // 执行参数为空的方法
            return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,指定参数,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteScalar #2
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            // 创建并打开数据库连接对象,操作完成释放对象.
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                // 调用指定数据库连接字符串重载方法.
                return ExecuteScalar(connection, commandType, commandText, commandParameters);
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,指定参数,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", para);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteScalar #2
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            // 创建并打开数据库连接对象,操作完成释放对象.
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                // 调用指定数据库连接字符串重载方法.
                return ExecuteScalar(connection, commandType, commandText, para);
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,指定参数值,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues)
        {
            // ExecuteScalar #3
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);
                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);
                // 调用重载方法
                return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // 没有参数值
                return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText)
        {
            // ExecuteScalar #4
            // 执行参数为空的方法
            return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,指定参数,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteScalar #5
            if (connection == null) throw new ArgumentNullException("connection");
            // 创建SqlCommand命令,并进行预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);
            // 执行SqlCommand命令,并返回结果.
            object retval = null;
            try
            {
                retval = cmd.ExecuteScalar();
            }
            catch { }
            // 清除参数,以便再次使用.
            cmd.Parameters.Clear();
            if (mustCloseConnection)
                connection.Close();
            return retval;
        }


        /// <summary>
        /// 执行指定数据库连接对象的命令,指定参数,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", para);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteScalar #5
            if (connection == null) throw new ArgumentNullException("connection");
            // 创建SqlCommand命令,并进行预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, para, out mustCloseConnection);
            // 执行SqlCommand命令,并返回结果.
            object retval = null;
            try
            {
                retval = cmd.ExecuteScalar();
            }
            catch(Exception e) {

            }
            // 清除参数,以便再次使用.
            cmd.Parameters.Clear();
            if (mustCloseConnection)
                connection.Close();
            return retval;
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,指定参数值,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlConnection connection, string spName, params object[] parameterValues)
        {
            // ExecuteScalar #6
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);
                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);
                // 调用重载方法
                return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // 没有参数值
                return ExecuteScalar(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定数据库事务的命令,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText)
        {
            // ExecuteScalar #7
            // 执行参数为空的方法
            return ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库事务的命令,指定参数,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteScalar #8
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            // 创建SqlCommand命令,并进行预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // 执行SqlCommand命令,并返回结果.
            object retval = null;
            try
            {
                retval = cmd.ExecuteScalar();
            }
            catch { }

            // 清除参数,以便再次使用.
            cmd.Parameters.Clear();
            return retval;
        }

        /// <summary>
        /// 执行指定数据库事务的命令,指定参数,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", para);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlTransaction transaction, string commandText, string[,] para)
        {
            return ExecuteScalar(transaction, CommandType.Text, commandText, para);
        }

        /// <summary>
        /// 执行指定数据库事务的命令,指定参数,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", para);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteScalar #8
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            // 创建SqlCommand命令,并进行预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, para, out mustCloseConnection);

            // 执行SqlCommand命令,并返回结果.
            object retval = null;
            try
            {
                retval = cmd.ExecuteScalar();
            }
            catch { }

            // 清除参数,以便再次使用.
            cmd.Parameters.Clear();
            return retval;
        }

        /// <summary>
        /// 执行指定数据库事务的命令,指定参数值,返回结果集中的第一行第一列.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalar(SqlTransaction transaction, string spName, params object[] parameterValues)
        {
            // ExecuteScalar #9
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);

                // 调用重载方法
                return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // 没有参数值
                return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteScalar


        #region ExecuteXmlReader XML阅读器

        /// <summary>
        /// 执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText)
        {
            // ExecuteXmlReader #1
            // 执行参数为空的方法
            return ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteXmlReader #2
            if (connection == null) throw new ArgumentNullException("connection");
            bool mustCloseConnection = false;

            // 创建SqlCommand命令,并进行预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            try
            {
                PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);

                // 执行命令
                XmlReader retval = cmd.ExecuteXmlReader();

                // 清除参数,以便再次使用.
                cmd.Parameters.Clear();
                return retval;
            }
            catch
            {
                if (mustCloseConnection)
                    connection.Close();
                throw;
            }
        }

        /// <summary>
        /// 执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteXmlReader #2
            if (connection == null) throw new ArgumentNullException("connection");
            bool mustCloseConnection = false;

            // 创建SqlCommand命令,并进行预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            try
            {
                PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, para, out mustCloseConnection);

                // 执行命令
                XmlReader retval = cmd.ExecuteXmlReader();

                // 清除参数,以便再次使用.
                cmd.Parameters.Clear();
                return retval;
            }
            catch
            {
                if (mustCloseConnection)
                    connection.Close();
                throw;
            }
        }

        /// <summary>
        /// 执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数值.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// XmlReader r = ExecuteXmlReader(conn, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称 using "FOR XML AUTO"</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReader(SqlConnection connection, string spName, params object[] parameterValues)
        {
            // ExecuteXmlReader #3
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);

                // 调用重载方法
                return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // 没有参数值
                return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText)
        {
            // ExecuteXmlReader #4
            // 执行参数为空的方法
            return ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])null);
        }

        /// <summary>
        /// 执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
        {
            // ExecuteXmlReader #5
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            // 创建SqlCommand命令,并进行预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // 执行命令
            XmlReader retval = cmd.ExecuteXmlReader();

            // 清除参数,以便再次使用.
            cmd.Parameters.Clear();
            return retval;
        }

        /// <summary>
        /// 执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", para);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText, string[,] para)
        {
            // ExecuteXmlReader #5
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            // 创建SqlCommand命令,并进行预处理
            SqlCommand cmd = new SqlCommand();
            cmd.CommandTimeout = CommandTimeOut;
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, para, out mustCloseConnection);

            // 执行命令
            XmlReader retval = cmd.ExecuteXmlReader();

            // 清除参数,以便再次使用.
            cmd.Parameters.Clear();
            return retval;
        }

        /// <summary>
        /// 执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数值.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// XmlReader r = ExecuteXmlReader(trans, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        /// <returns>返回一个包含结果集的DataSet.</returns>
        public static XmlReader ExecuteXmlReader(SqlTransaction transaction, string spName, params object[] parameterValues)
        {
            // ExecuteXmlReader #6
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);

                // 调用重载方法
                return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // 没有参数值
                return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteXmlReader 阅读器结束


        #region FillDataset 填充数据集

        /// <summary>
        /// 执行指定数据库连接字符串的命令,映射数据表并填充数据集.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)</param>
        public static void FillDataset(string connectionString, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames)
        {
            // FillDataset #1
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (dataSet == null) throw new ArgumentNullException("dataSet");

            // 创建并打开数据库连接对象,操作完成释放对象.
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();

                // 调用指定数据库连接字符串重载方法.
                FillDataset(connection, commandType, commandText, dataSet, tableNames);
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,映射数据表并填充数据集.指定命令参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">分配给命令的SqlParamter参数数组</param>
        /// <param name="tableNames">要填充结果集的DataSet实例</param>
        /// <param name="commandParameters">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        public static void FillDataset(string connectionString, CommandType commandType,
            string commandText, DataSet dataSet, string[] tableNames,
            params SqlParameter[] commandParameters)
        {
            // FillDataset #2
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (dataSet == null) throw new ArgumentNullException("dataSet");

            // 创建并打开数据库连接对象,操作完成释放对象.
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                // 调用指定数据库连接字符串重载方法.
                FillDataset(connection, commandType, commandText, dataSet, tableNames, commandParameters);
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,映射数据表并填充数据集.指定命令参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, para);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        /// <param name="tableNames">要填充结果集的DataSet实例</param>
        /// <param name="commandParameters">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        public static void FillDataset(string connectionString, CommandType commandType,
            string commandText, DataSet dataSet, string[] tableNames,
            string[,] para)
        {
            // FillDataset #2
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (dataSet == null) throw new ArgumentNullException("dataSet");

            // 创建并打开数据库连接对象,操作完成释放对象.
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                // 调用指定数据库连接字符串重载方法.
                FillDataset(connection, commandType, commandText, dataSet, tableNames, para);
            }
        }

        /// <summary>
        /// 执行指定数据库连接字符串的命令,映射数据表并填充数据集,指定存储过程参数值.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, 24);
        /// </remarks>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>   
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        public static void FillDataset(string connectionString, string spName, DataSet dataSet, string[] tableNames, params object[] parameterValues)
        {
            // FillDataset #3
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            // 创建并打开数据库连接对象,操作完成释放对象.
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                //IntelnetConnState.HasNetworkAlive();
                connection.Open();
                // 调用指定数据库连接字符串重载方法.
                FillDataset(connection, spName, dataSet, tableNames, parameterValues);
            }
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,映射数据表并填充数据集.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>   
        public static void FillDataset(SqlConnection connection, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames)
        {
            // FillDataset #4
            FillDataset(connection, commandType, commandText, dataSet, tableNames, (SqlParameter)null);
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,映射数据表并填充数据集,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        public static void FillDataset(SqlConnection connection, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames, params SqlParameter[] commandParameters)
        {
            // FillDataset #5
            FillDataset(connection, null, commandType, commandText, dataSet, tableNames, commandParameters);
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,映射数据表并填充数据集,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, para);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        public static void FillDataset(SqlConnection connection, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames, string[,] para)
        {
            // FillDataset #5
            FillDataset(connection, null, commandType, commandText, dataSet, tableNames, para);
        }

        /// <summary>
        /// 执行指定数据库连接对象的命令,映射数据表并填充数据集,指定存储过程参数值.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// FillDataset(conn, "GetOrders", ds, new string[] {"orders"}, 24, 36);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        public static void FillDataset(SqlConnection connection, string spName, DataSet dataSet, string[] tableNames, params object[] parameterValues)
        {
            // FillDataset #6
            if (connection == null) throw new ArgumentNullException("connection");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);

                // 调用重载方法
                FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
            }
            else
            {
                // 没有参数值
                FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames);
            }
        }

        /// <summary>
        /// 执行指定数据库事务的命令,映射数据表并填充数据集.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        public static void FillDataset(SqlTransaction transaction, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames)
        {
            // FillDataset #7
            FillDataset(transaction, commandType, commandText, dataSet, tableNames, (SqlParameter)null);
        }

        /// <summary>
        /// 执行指定数据库事务的命令,映射数据表并填充数据集,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        public static void FillDataset(SqlTransaction transaction, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames, params SqlParameter[] commandParameters)
        {
            // FillDataset #8
            FillDataset(transaction.Connection, transaction, commandType, commandText, dataSet, tableNames, commandParameters);
        }


        /// <summary>
        /// 执行指定数据库事务的命令,映射数据表并填充数据集,指定参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, para);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        public static void FillDataset(SqlTransaction transaction, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames, string[,] para)
        {
            // FillDataset #8
            FillDataset(transaction.Connection, transaction, commandType, commandText, dataSet, tableNames, para);
        }

        /// <summary>
        /// 执行指定数据库事务的命令,映射数据表并填充数据集,指定存储过程参数值.
        /// </summary>
        /// <remarks>
        /// 此方法不提供访问存储过程输出参数和返回值参数.
        /// 示例: 
        /// FillDataset(trans, "GetOrders", ds, new string[]{"orders"}, 24, 36);
        /// </remarks>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>
        public static void FillDataset(SqlTransaction transaction, string spName, DataSet dataSet, string[] tableNames, params object[] parameterValues)
        {
            // FillDataset #9
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果有参数值
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 给存储过程参数赋值
                AssignParameterValues(commandParameters, parameterValues);

                // 调用重载方法
                FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
            }
            else
            {
                // 没有参数值
                FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames);
            }
        }

        /// <summary>
        /// [私有方法][内部调用]执行指定数据库连接对象/事务的命令,映射数据表并填充数据集,DataSet/TableNames/SqlParameters.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(conn, trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        /// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>
        private static void FillDataset(SqlConnection connection, SqlTransaction transaction, CommandType commandType,
            string commandText, DataSet dataSet, string[] tableNames, params SqlParameter[] commandParameters)
        {
            // FillDataset #10
            if (connection == null) throw new ArgumentNullException("connection");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            // 创建SqlCommand命令,并进行预处理
            SqlCommand command = new SqlCommand();
            bool mustCloseConnection = false;
            PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // 执行命令
            using (SqlDataAdapter dataAdapter = new SqlDataAdapter(command))
            {
                // 追加表映射
                if (tableNames != null && tableNames.Length > 0)
                {
                    string tableName = "Table";
                    for (int index = 0; index < tableNames.Length; index++)
                    {
                        if (tableNames[index] == null || tableNames[index].Length == 0) throw new ArgumentException("The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames");
                        dataAdapter.TableMappings.Add(tableName, tableNames[index]);
                        tableName += (index + 1).ToString();
                    }
                }

                // 填充数据集使用默认表名称
                dataAdapter.Fill(dataSet);

                // 清除参数,以便再次使用.
                command.Parameters.Clear();
            }
            if (mustCloseConnection)
                connection.Close();
        }

        /// <summary>
        /// [私有方法][内部调用]执行指定数据库连接对象/事务的命令,映射数据表并填充数据集,DataSet/TableNames/SqlParameters.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// FillDataset(conn, trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, para);
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="transaction">一个有效的连接事务</param>
        /// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>
        /// <param name="commandText">存储过程名称或T-SQL语句</param>
        /// <param name="dataSet">要填充结果集的DataSet实例</param>
        /// <param name="tableNames">表映射的数据表数组
        /// 用户定义的表名 (可有是实际的表名.)
        /// </param>
        /// <param name="para">
        ///     <para>和命令相关联的string2维数组,如果没有参数为'null'</para>
        ///     <para>1.string[,] para={{"参数名","参数值","获取或设置一个值，该值指示参数是只可输入、只可输出、双向还是存储过程返回值参数"}};   Input,InputOutput,Output,ReturnValue</para>
        ///     <para>2.string[,] para={{"参数名","参数值"}}; 少的这个为默认Input只可输入</para>
        /// </param>
        private static void FillDataset(SqlConnection connection, SqlTransaction transaction, CommandType commandType,
            string commandText, DataSet dataSet, string[] tableNames, string[,] para)
        {
            // FillDataset #10
            if (connection == null) throw new ArgumentNullException("connection");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            // 创建SqlCommand命令,并进行预处理
            SqlCommand command = new SqlCommand();
            bool mustCloseConnection = false;
            PrepareCommand(command, connection, transaction, commandType, commandText, para, out mustCloseConnection);

            // 执行命令
            using (SqlDataAdapter dataAdapter = new SqlDataAdapter(command))
            {
                // 追加表映射
                if (tableNames != null && tableNames.Length > 0)
                {
                    string tableName = "Table";
                    for (int index = 0; index < tableNames.Length; index++)
                    {
                        if (tableNames[index] == null || tableNames[index].Length == 0) throw new ArgumentException("The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames");
                        dataAdapter.TableMappings.Add(tableName, tableNames[index]);
                        tableName += (index + 1).ToString();
                    }
                }

                // 填充数据集使用默认表名称
                dataAdapter.Fill(dataSet);

                // 清除参数,以便再次使用.
                command.Parameters.Clear();
            }
            if (mustCloseConnection)
                connection.Close();
        }

        #endregion FillDataset 填充数据集


        #region UpdateDataset 更新数据集

        /// <summary>
        /// 执行数据集更新到数据库,指定inserted, updated, or deleted命令.
        /// </summary>
        /// <remarks>
        /// 示例: 
        /// UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");
        /// </remarks>
        /// <param name="insertCommand">[追加记录]一个有效的T-SQL语句或存储过程</param>
        /// <param name="deleteCommand">[删除记录]一个有效的T-SQL语句或存储过程</param>
        /// <param name="updateCommand">[更新记录]一个有效的T-SQL语句或存储过程</param>
        /// <param name="dataSet">要更新到数据库的DataSet</param>
        /// <param name="tableName">要更新到数据库的DataTable</param>
        public static void UpdateDataset(SqlCommand insertCommand, SqlCommand deleteCommand, SqlCommand updateCommand, DataSet dataSet, string tableName)
        {
            if (insertCommand == null) throw new ArgumentNullException("insertCommand");
            if (deleteCommand == null) throw new ArgumentNullException("deleteCommand");
            if (updateCommand == null) throw new ArgumentNullException("updateCommand");
            if (tableName == null || tableName.Length == 0) throw new ArgumentNullException("tableName");

            // 创建SqlDataAdapter,当操作完成后释放.
            using (SqlDataAdapter dataAdapter = new SqlDataAdapter())
            {
                // 设置数据适配器命令
                dataAdapter.UpdateCommand = updateCommand;
                dataAdapter.InsertCommand = insertCommand;
                dataAdapter.DeleteCommand = deleteCommand;

                // 更新数据集改变到数据库
                dataAdapter.Update(dataSet, tableName);

                // 提交所有改变到数据集.
                dataSet.AcceptChanges();
            }
        }

        #endregion UpdateDataset 更新数据集


        #region CreateCommand 创建一条SqlCommand命令

        /// <summary>
        /// 创建SqlCommand命令,指定数据库连接对象,存储过程名和参数.
        /// </summary>
        /// <remarks>
        /// 示例: 
        ///  SqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName");
        /// </remarks>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="sourceColumns">源表的列名称数组</param>
        /// <returns>返回SqlCommand命令</returns>
        public static SqlCommand CreateCommand(SqlConnection connection, string spName, params string[] sourceColumns)
        {
            // CreateCommand #1
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 创建命令
            SqlCommand cmd = new SqlCommand(spName, connection);
            cmd.CommandTimeout = CommandTimeOut;
            cmd.CommandType = CommandType.StoredProcedure;

            // 如果有参数值
            if ((sourceColumns != null) && (sourceColumns.Length > 0))
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 将源表的列到映射到DataSet命令中.
                for (int index = 0; index < sourceColumns.Length; index++)
                    commandParameters[index].SourceColumn = sourceColumns[index];

                // Attach the discovered parameters to the SqlCommand object
                AttachParameters(cmd, commandParameters);
            }
            return cmd;
        }

        #endregion CreateCommand 创建一条SqlCommand命令


        #region ExecuteNonQueryTypedParams 类型化参数(DataRow)

        /// <summary>
        /// 执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回受影响的行数.
        /// </summary>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQueryTypedParams(String connectionString, String spName, DataRow dataRow)
        {
            // ExecuteNonQueryTypedParams #1
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回受影响的行数.
        /// </summary>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQueryTypedParams(SqlConnection connection, String spName, DataRow dataRow)
        {
            // ExecuteNonQueryTypedParams #2
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
            }
        }



        /// <summary>
        /// 执行指定连接数据库事物的存储过程,使用DataRow做为参数值,返回受影响的行数.
        /// </summary>
        /// <param name="transaction">一个有效的连接事务 object</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回影响的行数</returns>
        public static int ExecuteNonQueryTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
        {
            // ExecuteNonQueryTypedParams #3
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            // Sf the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);
                return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteNonQueryTypedParams 类型化参数(DataRow)

        #region ExecuteDatasetTypedParams 类型化参数(DataRow)

        /// <summary>
        /// 执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回DataSet.
        /// </summary>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回一个包含结果集的DataSet.</returns>
        public static DataSet ExecuteDatasetTypedParams(string connectionString, String spName, DataRow dataRow)
        {
            // ExecuteDatasetTypedParams #1
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
            //如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回DataSet.
        /// </summary>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回一个包含结果集的DataSet.</returns>
        public static DataSet ExecuteDatasetTypedParams(SqlConnection connection, String spName, DataRow dataRow)
        {
            // ExecuteDatasetTypedParams #2
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回DataSet.
        /// </summary>
        /// <param name="transaction">一个有效的连接事务 object</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回一个包含结果集的DataSet.</returns>
        public static DataSet ExecuteDatasetTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
        {
            // ExecuteDatasetTypedParams #3
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteDatasetTypedParams 类型化参数(DataRow)

        #region ExecuteReaderTypedParams 类型化参数(DataRow)

        /// <summary>
        /// 执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回DataReader.
        /// </summary>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReaderTypedParams(String connectionString, String spName, DataRow dataRow)
        {
            // ExecuteReaderTypedParams #1
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回DataReader.
        /// </summary>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow)
        {
            // ExecuteReaderTypedParams #2
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定连接数据库事物的存储过程,使用DataRow做为参数值,返回DataReader.
        /// </summary>
        /// <param name="transaction">一个有效的连接事务 object</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回包含结果集的SqlDataReader</returns>
        public static SqlDataReader ExecuteReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
        {
            // ExecuteReaderTypedParams #3
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteReaderTypedParams 类型化参数(DataRow)

        #region ExecuteScalarTypedParams 类型化参数(DataRow)

        /// <summary>
        /// 执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列.
        /// </summary>
        /// <param name="connectionString">一个有效的数据库连接字符串</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalarTypedParams(String connectionString, String spName, DataRow dataRow)
        {
            // ExecuteScalarTypedParams #1
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connectionString, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列.
        /// </summary>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalarTypedParams(SqlConnection connection, String spName, DataRow dataRow)
        {
            // ExecuteScalarTypedParams #2
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列.
        /// </summary>
        /// <param name="transaction">一个有效的连接事务 object</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回结果集中的第一行第一列</returns>
        public static object ExecuteScalarTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
        {
            // ExecuteScalarTypedParams #3
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteScalarTypedParams 类型化参数(DataRow)

        #region ExecuteXmlReaderTypedParams 类型化参数(DataRow)

        /// <summary>
        /// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回XmlReader类型的结果集.
        /// </summary>
        /// <param name="connection">一个有效的数据库连接对象</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow)
        {
            // ExecuteXmlReaderTypedParams #1
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// 执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回XmlReader类型的结果集.
        /// </summary>
        /// <param name="transaction">一个有效的连接事务 object</param>
        /// <param name="spName">存储过程名称</param>
        /// <param name="dataRow">使用DataRow作为参数值</param>
        /// <returns>返回XmlReader结果集对象.</returns>
        public static XmlReader ExecuteXmlReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
        {
            // ExecuteXmlReaderTypedParams #2
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            // 如果row有值,存储过程必须初始化.
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()
                SqlParameter[] commandParameters = GetSpParameterSet(transaction.Connection, spName);

                // 分配参数值
                AssignParameterValues(commandParameters, dataRow);

                return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
            }

        }

        #endregion ExecuteXmlReaderTypedParams 类型化参数(DataRow)

        #region private methods, variables, and constructors

        //Since this class provides only static methods, make the default constructor private to prevent 
        //instances from being created with "new SqlHelperParameterCache()"
        //private SqlHelperParameterCache() { }

        private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable());

        /// <summary>
        /// Resolve at run time the appropriate set of SqlParameters for a stored procedure
        /// </summary>
        /// <param name="connection">A valid SqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="includeReturnValueParameter">Whether or not to include their return value parameter</param>
        /// <returns>The parameter array discovered.</returns>
        private static SqlParameter[] DiscoverSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            SqlCommand cmd = new SqlCommand(spName, connection);
            cmd.CommandTimeout = CommandTimeOut;
            cmd.CommandType = CommandType.StoredProcedure;
            //IntelnetConnState.HasNetworkAlive();
            connection.Open();
            SqlCommandBuilder.DeriveParameters(cmd);
            connection.Close();

            if (!includeReturnValueParameter)
            {
                cmd.Parameters.RemoveAt(0);
            }

            SqlParameter[] discoveredParameters = new SqlParameter[cmd.Parameters.Count];

            cmd.Parameters.CopyTo(discoveredParameters, 0);

            // Init the parameters with a DBNull value
            foreach (SqlParameter discoveredParameter in discoveredParameters)
            {
                discoveredParameter.Value = DBNull.Value;
            }
            return discoveredParameters;
        }

        /// <summary>
        /// Deep copy of cached SqlParameter array
        /// </summary>
        /// <param name="originalParameters"></param>
        /// <returns></returns>
        private static SqlParameter[] CloneParameters(SqlParameter[] originalParameters)
        {
            SqlParameter[] clonedParameters = new SqlParameter[originalParameters.Length];

            for (int i = 0, j = originalParameters.Length; i < j; i++)
            {
                clonedParameters[i] = (SqlParameter)((ICloneable)originalParameters[i]).Clone();
            }

            return clonedParameters;
        }

        #endregion private methods, variables, and constructors

        #region caching functions

        /// <summary>
        /// Add parameter array to the cache
        /// </summary>
        /// <param name="connectionString">A valid connection string for a SqlConnection</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters to be cached</param>
        public static void CacheParameterSet(string connectionString, string commandText, params SqlParameter[] commandParameters)
        {
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");

            string hashKey = connectionString + ":" + commandText;

            paramCache[hashKey] = commandParameters;
        }

        /// <summary>
        /// Retrieve a parameter array from the cache
        /// </summary>
        /// <param name="connectionString">A valid connection string for a SqlConnection</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>An array of SqlParamters</returns>
        public static SqlParameter[] GetCachedParameterSet(string connectionString, string commandText)
        {
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");

            string hashKey = connectionString + ":" + commandText;

            SqlParameter[] cachedParameters = paramCache[hashKey] as SqlParameter[];
            if (cachedParameters == null)
            {
                return null;
            }
            else
            {
                return CloneParameters(cachedParameters);
            }
        }

        #endregion caching functions

        #region Parameter Discovery Functions

        /// <summary>
        /// Retrieves the set of SqlParameters appropriate for the stored procedure
        /// </summary>
        /// <remarks>
        /// This method will query the database for this information, and then store it in a cache for future requests.
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a SqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <returns>An array of SqlParameters</returns>
        public static SqlParameter[] GetSpParameterSet(string connectionString, string spName)
        {
            return GetSpParameterSet(connectionString, spName, false);
        }

        /// <summary>
        /// Retrieves the set of SqlParameters appropriate for the stored procedure
        /// </summary>
        /// <remarks>
        /// This method will query the database for this information, and then store it in a cache for future requests.
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a SqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="includeReturnValueParameter">A bool value indicating whether the return value parameter should be included in the results</param>
        /// <returns>An array of SqlParameters</returns>
        public static SqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
        {
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                return GetSpParameterSetInternal(connection, spName, includeReturnValueParameter);
            }
        }

        /// <summary>
        /// Retrieves the set of SqlParameters appropriate for the stored procedure
        /// </summary>
        /// <remarks>
        /// This method will query the database for this information, and then store it in a cache for future requests.
        /// </remarks>
        /// <param name="connection">A valid SqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <returns>An array of SqlParameters</returns>
        internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName)
        {
            return GetSpParameterSet(connection, spName, false);
        }

        /// <summary>
        /// Retrieves the set of SqlParameters appropriate for the stored procedure
        /// </summary>
        /// <remarks>
        /// This method will query the database for this information, and then store it in a cache for future requests.
        /// </remarks>
        /// <param name="connection">A valid SqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="includeReturnValueParameter">A bool value indicating whether the return value parameter should be included in the results</param>
        /// <returns>An array of SqlParameters</returns>
        internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            using (SqlConnection clonedConnection = (SqlConnection)((ICloneable)connection).Clone())
            {
                return GetSpParameterSetInternal(clonedConnection, spName, includeReturnValueParameter);
            }
        }

        /// <summary>
        /// Retrieves the set of SqlParameters appropriate for the stored procedure
        /// </summary>
        /// <param name="connection">A valid SqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="includeReturnValueParameter">A bool value indicating whether the return value parameter should be included in the results</param>
        /// <returns>An array of SqlParameters</returns>
        private static SqlParameter[] GetSpParameterSetInternal(SqlConnection connection, string spName, bool includeReturnValueParameter)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");

            string hashKey = connection.ConnectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter" : "");

            SqlParameter[] cachedParameters;

            cachedParameters = paramCache[hashKey] as SqlParameter[];
            if (cachedParameters == null)
            {
                SqlParameter[] spParameters = DiscoverSpParameterSet(connection, spName, includeReturnValueParameter);
                paramCache[hashKey] = spParameters;
                cachedParameters = spParameters;
            }

            return CloneParameters(cachedParameters);
        }

        #endregion Parameter Discovery Functions


        #region 批量操作

        /// <summary>
        /// 大批量数据插入
        /// </summary>
        /// <param name="table">数据表</param>
        public static void BulkInsert( DataTable table)
        {
            if (cStr == null || cStr.Length == 0) throw new ArgumentNullException("connectionString");
            BulkInsert(cStr, table);
        }

        /// <summary>
        /// 大批量数据插入
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="table">数据表</param>
        public static void BulkInsert(string connectionString, DataTable table)
        {
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(table.TableName)) throw new Exception("DataTable.TableName属性不能为空");
            using (SqlBulkCopy bulk = new SqlBulkCopy(connectionString))
            {
                bulk.BatchSize = BatchSize;
                bulk.BulkCopyTimeout = CommandTimeOut;
                bulk.DestinationTableName = table.TableName;
                foreach (DataColumn col in table.Columns)
                {
                    bulk.ColumnMappings.Add(col.ColumnName, col.ColumnName);
                }
                bulk.WriteToServer(table);
                bulk.Close();
            }
        }

        /// <summary>
        /// 使用MySqlDataAdapter批量更新数据
        /// </summary>
        /// <param name="table">数据表</param>
        public static void BatchUpdate(DataTable table)
        {
            if (cStr == null || cStr.Length == 0) throw new ArgumentNullException("connectionString");
            BatchUpdate(cStr, table);
        }

        /// <summary>
        /// 使用MySqlDataAdapter批量更新数据
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="table">数据表</param>
        public static void BatchUpdate(string connectionString, DataTable table)
        {
            if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");

            SqlConnection connection = new SqlConnection(connectionString);

            SqlCommand command = connection.CreateCommand();
            command.CommandTimeout = CommandTimeOut;
            command.CommandType = CommandType.Text;
            SqlDataAdapter adapter = new SqlDataAdapter(command);
            SqlCommandBuilder commandBulider = new SqlCommandBuilder(adapter);
            commandBulider.ConflictOption = ConflictOption.OverwriteChanges;

            SqlTransaction transaction = null;
            try
            {
                connection.Open();
                transaction = connection.BeginTransaction();
                //设置批量更新的每次处理条数
                adapter.UpdateBatchSize = BatchSize;
                //设置事物
                adapter.SelectCommand.Transaction = transaction;

                if (table.ExtendedProperties["SQL"] != null)
                {
                    adapter.SelectCommand.CommandText = table.ExtendedProperties["SQL"].ToString();
                }
                adapter.Update(table);
                transaction.Commit();/////提交事务
            }
            catch (SqlException ex)
            {
                if (transaction != null) transaction.Rollback();
                throw ex;
            }
            finally
            {
                connection.Close();
                connection.Dispose();
            }
        }

        /// <summary>
        /// 分批次批量删除数据
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="sql">SQL语句</param>
        /// <param name="batchSize">每批次更新记录行数</param>
        /// <param name="interval">批次执行间隔(秒)</param>
        public static void BatchDelete(string connectionString, string sql, int batchSize = 1000, int interval = 1)
        {
            sql = sql.ToLower();

            if (batchSize < 1000) batchSize = 1000;
            if (interval < 1) interval = 1;
            while (ExecuteScalar(connectionString, sql.Replace("delete", "select top 1 1")) != null)
            {
                ExecuteNonQuery(connectionString, CommandType.Text, sql.Replace("delete", string.Format("delete top ({0})", batchSize)));
                System.Threading.Thread.Sleep(interval * 1000);
            }
        }

        /// <summary>
        /// 分批次批量更新数据
        /// </summary>
        /// <param name="connectionString">数据库连接字符串</param>
        /// <param name="sql">SQL语句</param>
        /// <param name="batchSize">每批次更新记录行数</param>
        /// <param name="interval">批次执行间隔(秒)</param>
        public static void BatchUpdate(string connectionString, string sql, int batchSize = 1000, int interval = 1)
        {
            if (batchSize < 1000) batchSize = 1000;
            if (interval < 1) interval = 1;
            string existsSql = Regex.Replace(sql, @"[\w\s.=,']*from", "select top 1 1 from", RegexOptions.IgnoreCase);
            existsSql = Regex.Replace(existsSql, @"set[\w\s.=,']* where", "where", RegexOptions.IgnoreCase);
            existsSql = Regex.Replace(existsSql, @"update", "select top 1 1 from", RegexOptions.IgnoreCase);
            while (ExecuteScalar<int>(connectionString, existsSql) != 0)
            {
                ExecuteNonQuery(connectionString, CommandType.Text, Regex.Replace(sql, "update", string.Format("update top ({0})", batchSize), RegexOptions.IgnoreCase));
                System.Threading.Thread.Sleep(interval * 1000);
            }
        }

        #endregion 批量操作
    }
}

using System;
using System.Collections.Generic;
using System.Data;
using System.Reflection;

namespace HHTechDB
{
    /// <summary>
    /// DataTable与实体类互相转换
    /// </summary>
    /// <typeparam name="T">实体类</typeparam>
    public class ModelHandler<T> where T : class,new()
    {
        #region DataTable转换成实体类

        /// <summary>
        /// 填充对象列表：用DataSet的第一个表填充实体类
        /// </summary>
        /// <param name="ds">DataSet</param>
        /// <returns></returns>
        public List<T> FillModel(DataSet ds)
        {
            if (ds == null || ds.Tables[0] == null || ds.Tables[0].Rows.Count == 0)
            {
                return null;
            }
            else
            {
                return FillModel(ds.Tables[0]);
            }
        }

        /// <summary>  
        /// 填充对象列表：用DataSet的第index个表填充实体类
        /// </summary>  
        public List<T> FillModel(DataSet ds, int index)
        {
            if (ds == null || ds.Tables.Count <= index || ds.Tables[index].Rows.Count == 0)
            {
                return null;
            }
            else
            {
                return FillModel(ds.Tables[index]);
            }
        }

        /// <summary>  
        /// 填充对象列表：用DataTable填充实体类
        /// </summary>  
        public List<T> FillModel(DataTable dt)
        {
            if (dt == null || dt.Rows.Count == 0)
            {
                return null;
            }
            List<T> modelList = new List<T>();

            foreach (DataRow dr in dt.Rows)
            {
                //T model = (T)Activator.CreateInstance(typeof(T));  
                T model = new T();
                for (int i = 0; i < dr.Table.Columns.Count; i++)
                {
                    if(string.IsNullOrEmpty(dr[i].ToString()))
                    {
                        continue;
                    }
                    PropertyInfo propertyInfo = model.GetType().GetProperty(dr.Table.Columns[i].ColumnName);
                    if (propertyInfo != null && propertyInfo.CanWrite && !Convert.IsDBNull(dr[i]))
                    {
                        if (propertyInfo.PropertyType.Name == "Byte" && dr[i].GetType().Name == "Boolean")
                        {
                            propertyInfo.SetValue(model, (byte)((bool)dr[i]==true?1:0), null);
                        }
                        else if (propertyInfo.PropertyType.Name == "String" && dr[i].GetType().Name == "Int32")
                        {
                            propertyInfo.SetValue(model, dr[i].ToString(), null);
                        }
                        else
                        {
                            propertyInfo.SetValue(model, dr[i], null);
                        }
                    }
                        
                }

                modelList.Add(model);
            }
            return modelList;
        }

        /// <summary>  
        /// 填充对象：用DataRow填充实体类
        /// </summary>  
        public T FillModel(DataRow dr)
        {
            if (dr == null)
            {
                return default(T);
            }

            //T model = (T)Activator.CreateInstance(typeof(T));  
            T model = new T();

            for (int i = 0; i < dr.Table.Columns.Count; i++)
            {
                PropertyInfo propertyInfo = model.GetType().GetProperty(dr.Table.Columns[i].ColumnName);
                if (propertyInfo != null && dr[i] != DBNull.Value)
                    propertyInfo.SetValue(model, dr[i], null);
            }
            return model;
        }

        #endregion

        #region 实体类转换成DataTable

        /// <summary>
        /// 实体类转换成DataSet
        /// </summary>
        /// <param name="modelList">实体类列表</param>
        /// <returns></returns>
        public DataSet FillDataSet(List<T> modelList)
        {
            if (modelList == null || modelList.Count == 0)
            {
                return null;
            }
            else
            {
                DataSet ds = new DataSet();
                ds.Tables.Add(FillDataTable(modelList));
                return ds;
            }
        }

        /// <summary>
        /// 实体类转换成DataTable
        /// </summary>
        /// <param name="modelList">实体类列表</param>
        /// <returns></returns>
        public DataTable FillDataTable(List<T> modelList)
        {
            if (modelList == null || modelList.Count == 0)
            {
                return null;
            }
            DataTable dt = CreateData(modelList[0]);

            foreach (T model in modelList)
            {
                DataRow dataRow = dt.NewRow();
                foreach (PropertyInfo propertyInfo in typeof(T).GetProperties())
                {
                    dataRow[propertyInfo.Name] = propertyInfo.GetValue(model, null);
                }
                dt.Rows.Add(dataRow);
            }
            return dt;
        }

        /// <summary>
        /// 根据实体类得到表结构
        /// </summary>
        /// <param name="model">实体类</param>
        /// <returns></returns>
        private DataTable CreateData(T model)
        {
            DataTable dataTable = new DataTable(typeof(T).Name);
            foreach (PropertyInfo propertyInfo in typeof(T).GetProperties())
            {
                dataTable.Columns.Add(new DataColumn(propertyInfo.Name, propertyInfo.PropertyType));
            }
            return dataTable;
        }

        #endregion
    }
}