asp.net连接mysql数据库+mysql公共类

web.config

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<?xml version="1.0"?> <!--   有关如何配置 ASP.NET 应用程序的详细信息，请访问   http://go.microsoft.com/fwlink/?LinkId=169433   --> <configuration>   <appSettings>     <add key="MYSQLCONNECTIONSTRING" value="Host=127.0.0.1;UserName=root;Password=phpnow;Database=cmt;Port=3307;CharSet=utf8;Allow Zero Datetime=true;"/>   </appSettings>     <system.web>         <compilation debug="true" targetFramework="4.0"/>     </system.web> </configuration>

　　

DbHelperMySQL.cs

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using System; using System.Collections; using System.Collections.Specialized; using System.Data; using MySql.Data.MySqlClient; using System.Configuration; using System.Data.Common; using System.Collections.Generic; namespace CMT.DBUtility {     /// <summary>     /// 数据访问抽象基础类     /// Copyright (C) Maticsoft     /// </summary>     public abstract class DbHelperMySQL     {         //数据库连接字符串(web.config来配置)，可以动态更改connectionString支持多数据库.             public static string connectionString = ConfigurationSettings.AppSettings["MYSQLCONNECTIONSTRING"];         public DbHelperMySQL()         {                    }           #region 公用方法         /// <summary>         /// 得到最大值         /// </summary>         /// <param name="FieldName"></param>         /// <param name="TableName"></param>         /// <returns></returns>         public static int GetMaxID(string FieldName, string TableName)         {             string strsql = "select max(" + FieldName + ")+1 from " + TableName;             object obj = GetSingle(strsql);             if (obj == null)             {                 return 1;             }             else             {                 return int.Parse(obj.ToString());             }         }         /// <summary>         /// 是否存在         /// </summary>         /// <param name="strSql"></param>         /// <returns></returns>         public static bool Exists(string strSql)         {             object obj = GetSingle(strSql);             int cmdresult;             if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))             {                 cmdresult = 0;             }             else             {                 cmdresult = int.Parse(obj.ToString());             }             if (cmdresult == 0)             {                 return false;             }             else             {                 return true;             }         }            /// <summary>         /// 是否存在（基于MySqlParameter）         /// </summary>         /// <param name="strSql"></param>         /// <param name="cmdParms"></param>         /// <returns></returns>         public static bool Exists(string strSql, params MySqlParameter[] cmdParms)         {             object obj = GetSingle(strSql, cmdParms);             int cmdresult;             if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))             {                 cmdresult = 0;             }             else             {                 cmdresult = int.Parse(obj.ToString());             }             if (cmdresult == 0)             {                 return false;             }             else             {                 return true;             }         }         #endregion           #region  执行简单SQL语句           /// <summary>         /// 执行SQL语句，返回影响的记录数         /// </summary>         /// <param name="SQLString">SQL语句</param>         /// <returns>影响的记录数</returns>         public static int ExecuteSql(string SQLString)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))                 {                     try                     {                         connection.Open();                         int rows = cmd.ExecuteNonQuery();                         return rows;                     }                     catch (MySql.Data.MySqlClient.MySqlException e)                     {                         connection.Close();                         throw e;                     }                 }             }         }           public static int ExecuteSqlByTime(string SQLString, int Times)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))                 {                     try                     {                         connection.Open();                         cmd.CommandTimeout = Times;                         int rows = cmd.ExecuteNonQuery();                         return rows;                     }                     catch (MySql.Data.MySqlClient.MySqlException e)                     {                         connection.Close();                         throw e;                     }                 }             }         }                 /// <summary>         /// 执行MySql和Oracle滴混合事务         /// </summary>         /// <param name="list">SQL命令行列表</param>         /// <param name="oracleCmdSqlList">Oracle命令行列表</param>         /// <returns>执行结果 0-由于SQL造成事务失败 -1 由于Oracle造成事务失败 1-整体事务执行成功</returns>         //public static int ExecuteSqlTran(List<CommandInfo> list, List<CommandInfo> oracleCmdSqlList)         //{         //    using (MySqlConnection conn = new MySqlConnection(connectionString))         //    {         //        conn.Open();         //        MySqlCommand cmd = new MySqlCommand();         //        cmd.Connection = conn;         //        MySqlTransaction tx = conn.BeginTransaction();         //        cmd.Transaction = tx;         //        try         //        {         //            foreach (CommandInfo myDE in list)         //            {         //                string cmdText = myDE.CommandText;         //                MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Parameters;         //                PrepareCommand(cmd, conn, tx, cmdText, cmdParms);         //                if (myDE.EffentNextType == EffentNextType.SolicitationEvent)         //                {         //                    if (myDE.CommandText.ToLower().IndexOf("count(") == -1)         //                    {         //                        tx.Rollback();         //                        throw new Exception("违背要求"+myDE.CommandText+"必须符合select count(..的格式");         //                        //return 0;         //                    }           //                    object obj = cmd.ExecuteScalar();         //                    bool isHave = false;         //                    if (obj == null && obj == DBNull.Value)         //                    {         //                        isHave = false;         //                    }         //                    isHave = Convert.ToInt32(obj) > 0;         //                    if (isHave)         //                    {         //                        //引发事件         //                        myDE.OnSolicitationEvent();         //                    }         //                }         //                if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine)         //                {         //                    if (myDE.CommandText.ToLower().IndexOf("count(") == -1)         //                    {         //                        tx.Rollback();         //                        throw new Exception("SQL:违背要求" + myDE.CommandText + "必须符合select count(..的格式");         //                        //return 0;         //                    }           //                    object obj = cmd.ExecuteScalar();         //                    bool isHave = false;         //                    if (obj == null && obj == DBNull.Value)         //                    {         //                        isHave = false;         //                    }         //                    isHave = Convert.ToInt32(obj) > 0;           //                    if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave)         //                    {         //                        tx.Rollback();         //                        throw new Exception("SQL:违背要求" + myDE.CommandText + "返回值必须大于0");         //                        //return 0;         //                    }         //                    if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave)         //                    {         //                        tx.Rollback();         //                        throw new Exception("SQL:违背要求" + myDE.CommandText + "返回值必须等于0");         //                        //return 0;         //                    }         //                    continue;         //                }         //                int val = cmd.ExecuteNonQuery();         //                if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0)         //                {         //                    tx.Rollback();         //                    throw new Exception("SQL:违背要求" + myDE.CommandText + "必须有影响行");         //                    //return 0;         //                }         //                cmd.Parameters.Clear();         //            }         //            string oraConnectionString = PubConstant.GetConnectionString("ConnectionStringPPC");         //            bool res = OracleHelper.ExecuteSqlTran(oraConnectionString, oracleCmdSqlList);         //            if (!res)         //            {         //                tx.Rollback();         //                throw new Exception("执行失败");         //                // return -1;         //            }         //            tx.Commit();         //            return 1;         //        }         //        catch (MySql.Data.MySqlClient.MySqlException e)         //        {         //            tx.Rollback();         //            throw e;         //        }         //        catch (Exception e)         //        {         //            tx.Rollback();         //            throw e;         //        }         //    }         //}                /// <summary>         /// 执行多条SQL语句，实现数据库事务。         /// </summary>         /// <param name="SQLStringList">多条SQL语句</param>             public static int ExecuteSqlTran(List<String> SQLStringList)         {             using (MySqlConnection conn = new MySqlConnection(connectionString))             {                 conn.Open();                 MySqlCommand cmd = new MySqlCommand();                 cmd.Connection = conn;                 MySqlTransaction tx = conn.BeginTransaction();                 cmd.Transaction = tx;                 try                 {                     int count = 0;                     for (int n = 0; n < SQLStringList.Count; n++)                     {                         string strsql = SQLStringList[n];                         if (strsql.Trim().Length > 1)                         {                             cmd.CommandText = strsql;                             count += cmd.ExecuteNonQuery();                         }                     }                     tx.Commit();                     return count;                 }                 catch                 {                     tx.Rollback();                     return 0;                 }             }         }         /// <summary>         /// 执行带一个存储过程参数的的SQL语句。         /// </summary>         /// <param name="SQLString">SQL语句</param>         /// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>         /// <returns>影响的记录数</returns>         public static int ExecuteSql(string SQLString, string content)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 MySqlCommand cmd = new MySqlCommand(SQLString, connection);                 MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@content", SqlDbType.NText);                 myParameter.Value = content;                 cmd.Parameters.Add(myParameter);                 try                 {                     connection.Open();                     int rows = cmd.ExecuteNonQuery();                     return rows;                 }                 catch (MySql.Data.MySqlClient.MySqlException e)                 {                     throw e;                 }                 finally                 {                     cmd.Dispose();                     connection.Close();                 }             }         }         /// <summary>         /// 执行带一个存储过程参数的的SQL语句。         /// </summary>         /// <param name="SQLString">SQL语句</param>         /// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>         /// <returns>影响的记录数</returns>         public static object ExecuteSqlGet(string SQLString, string content)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 MySqlCommand cmd = new MySqlCommand(SQLString, connection);                 MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@content", SqlDbType.NText);                 myParameter.Value = content;                 cmd.Parameters.Add(myParameter);                 try                 {                     connection.Open();                     object obj = cmd.ExecuteScalar();                     if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))                     {                         return null;                     }                     else                     {                         return obj;                     }                 }                 catch (MySql.Data.MySqlClient.MySqlException e)                 {                     throw e;                 }                 finally                 {                     cmd.Dispose();                     connection.Close();                 }             }         }         /// <summary>         /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)         /// </summary>         /// <param name="strSQL">SQL语句</param>         /// <param name="fs">图像字节,数据库的字段类型为image的情况</param>         /// <returns>影响的记录数</returns>         public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 MySqlCommand cmd = new MySqlCommand(strSQL, connection);                 MySql.Data.MySqlClient.MySqlParameter myParameter = new MySql.Data.MySqlClient.MySqlParameter("@fs", SqlDbType.Image);                 myParameter.Value = fs;                 cmd.Parameters.Add(myParameter);                 try                 {                     connection.Open();                     int rows = cmd.ExecuteNonQuery();                     return rows;                 }                 catch (MySql.Data.MySqlClient.MySqlException e)                 {                     throw e;                 }                 finally                 {                     cmd.Dispose();                     connection.Close();                 }             }         }           /// <summary>         /// 执行一条计算查询结果语句，返回查询结果（object）。         /// </summary>         /// <param name="SQLString">计算查询结果语句</param>         /// <returns>查询结果（object）</returns>         public static object GetSingle(string SQLString)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))                 {                     try                     {                         connection.Open();                         object obj = cmd.ExecuteScalar();                         if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))                         {                             return null;                         }                         else                         {                             return obj;                         }                     }                     catch (MySql.Data.MySqlClient.MySqlException e)                     {                         connection.Close();                         throw e;                     }                 }             }         }         public static object GetSingle(string SQLString, int Times)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 using (MySqlCommand cmd = new MySqlCommand(SQLString, connection))                 {                     try                     {                         connection.Open();                         cmd.CommandTimeout = Times;                         object obj = cmd.ExecuteScalar();                         if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))                         {                             return null;                         }                         else                         {                             return obj;                         }                     }                     catch (MySql.Data.MySqlClient.MySqlException e)                     {                         connection.Close();                         throw e;                     }                 }             }         }         /// <summary>         /// 执行查询语句，返回MySqlDataReader ( 注意：调用该方法后，一定要对MySqlDataReader进行Close )         /// </summary>         /// <param name="strSQL">查询语句</param>         /// <returns>MySqlDataReader</returns>         public static MySqlDataReader ExecuteReader(string strSQL)         {             MySqlConnection connection = new MySqlConnection(connectionString);             MySqlCommand cmd = new MySqlCommand(strSQL, connection);             try             {                 connection.Open();                 MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);                 return myReader;             }             catch (MySql.Data.MySqlClient.MySqlException e)             {                 throw e;             }             }         /// <summary>         /// 执行查询语句，返回DataSet         /// </summary>         /// <param name="SQLString">查询语句</param>         /// <returns>DataSet</returns>         public static DataSet Query(string SQLString)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 DataSet ds = new DataSet();                 try                 {                     connection.Open();                     MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);                     command.Fill(ds, "ds");                 }                 catch (MySql.Data.MySqlClient.MySqlException ex)                 {                     throw new Exception(ex.Message);                 }                 return ds;             }         }         public static DataSet Query(string SQLString, int Times)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 DataSet ds = new DataSet();                 try                 {                     connection.Open();                     MySqlDataAdapter command = new MySqlDataAdapter(SQLString, connection);                     command.SelectCommand.CommandTimeout = Times;                     command.Fill(ds, "ds");                 }                 catch (MySql.Data.MySqlClient.MySqlException ex)                 {                     throw new Exception(ex.Message);                 }                 return ds;             }         }               #endregion           #region 执行带参数的SQL语句           /// <summary>         /// 执行SQL语句，返回影响的记录数         /// </summary>         /// <param name="SQLString">SQL语句</param>         /// <returns>影响的记录数</returns>         public static int ExecuteSql(string SQLString, params MySqlParameter[] cmdParms)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 using (MySqlCommand cmd = new MySqlCommand())                 {                     try                     {                         PrepareCommand(cmd, connection, null, SQLString, cmdParms);                         int rows = cmd.ExecuteNonQuery();                         cmd.Parameters.Clear();                         return rows;                     }                     catch (MySql.Data.MySqlClient.MySqlException e)                     {                         throw e;                     }                 }             }         }             /// <summary>         /// 执行多条SQL语句，实现数据库事务。         /// </summary>         /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param>         public static void ExecuteSqlTran(Hashtable SQLStringList)         {             using (MySqlConnection conn = new MySqlConnection(connectionString))             {                 conn.Open();                 using (MySqlTransaction trans = conn.BeginTransaction())                 {                     MySqlCommand cmd = new MySqlCommand();                     try                     {                         //循环                         foreach (DictionaryEntry myDE in SQLStringList)                         {                             string cmdText = myDE.Key.ToString();                             MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Value;                             PrepareCommand(cmd, conn, trans, cmdText, cmdParms);                             int val = cmd.ExecuteNonQuery();                             cmd.Parameters.Clear();                         }                         trans.Commit();                     }                     catch                     {                         trans.Rollback();                         throw;                     }                 }             }         }         /// <summary>         /// 执行多条SQL语句，实现数据库事务。         /// </summary>         /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param>         public static int ExecuteSqlTran(System.Collections.Generic.List<CommandInfo> cmdList)         {             using (MySqlConnection conn = new MySqlConnection(connectionString))             {                 conn.Open();                 using (MySqlTransaction trans = conn.BeginTransaction())                 {                     MySqlCommand cmd = new MySqlCommand();                     try                     { int count = 0;                         //循环                         foreach (CommandInfo myDE in cmdList)                         {                             string cmdText = myDE.CommandText;                             MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Parameters;                             PrepareCommand(cmd, conn, trans, cmdText, cmdParms);                                                          if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine)                             {                                 if (myDE.CommandText.ToLower().IndexOf("count(") == -1)                                 {                                     trans.Rollback();                                     return 0;                                 }                                   object obj = cmd.ExecuteScalar();                                 bool isHave = false;                                 if (obj == null && obj == DBNull.Value)                                 {                                     isHave = false;                                 }                                 isHave = Convert.ToInt32(obj) > 0;                                   if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave)                                 {                                     trans.Rollback();                                     return 0;                                 }                                 if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave)                                 {                                     trans.Rollback();                                     return 0;                                 }                                 continue;                             }                             int val = cmd.ExecuteNonQuery();                             count += val;                             if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0)                             {                                 trans.Rollback();                                 return 0;                             }                             cmd.Parameters.Clear();                         }                         trans.Commit();                         return count;                     }                     catch                     {                         trans.Rollback();                         throw;                     }                 }             }         }         /// <summary>         /// 执行多条SQL语句，实现数据库事务。         /// </summary>         /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param>         public static void ExecuteSqlTranWithIndentity(System.Collections.Generic.List<CommandInfo> SQLStringList)         {             using (MySqlConnection conn = new MySqlConnection(connectionString))             {                 conn.Open();                 using (MySqlTransaction trans = conn.BeginTransaction())                 {                     MySqlCommand cmd = new MySqlCommand();                     try                     {                         int indentity = 0;                         //循环                         foreach (CommandInfo myDE in SQLStringList)                         {                             string cmdText = myDE.CommandText;                             MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Parameters;                             foreach (MySqlParameter q in cmdParms)                             {                                 if (q.Direction == ParameterDirection.InputOutput)                                 {                                     q.Value = indentity;                                 }                             }                             PrepareCommand(cmd, conn, trans, cmdText, cmdParms);                             int val = cmd.ExecuteNonQuery();                             foreach (MySqlParameter q in cmdParms)                             {                                 if (q.Direction == ParameterDirection.Output)                                 {                                     indentity = Convert.ToInt32(q.Value);                                 }                             }                             cmd.Parameters.Clear();                         }                         trans.Commit();                     }                     catch                     {                         trans.Rollback();                         throw;                     }                 }             }         }         /// <summary>         /// 执行多条SQL语句，实现数据库事务。         /// </summary>         /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的MySqlParameter[]）</param>         public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)         {             using (MySqlConnection conn = new MySqlConnection(connectionString))             {                 conn.Open();                 using (MySqlTransaction trans = conn.BeginTransaction())                 {                     MySqlCommand cmd = new MySqlCommand();                     try                     {                         int indentity = 0;                         //循环                         foreach (DictionaryEntry myDE in SQLStringList)                         {                             string cmdText = myDE.Key.ToString();                             MySqlParameter[] cmdParms = (MySqlParameter[])myDE.Value;                             foreach (MySqlParameter q in cmdParms)                             {                                 if (q.Direction == ParameterDirection.InputOutput)                                 {                                     q.Value = indentity;                                 }                             }                             PrepareCommand(cmd, conn, trans, cmdText, cmdParms);                             int val = cmd.ExecuteNonQuery();                             foreach (MySqlParameter q in cmdParms)                             {                                 if (q.Direction == ParameterDirection.Output)                                 {                                     indentity = Convert.ToInt32(q.Value);                                 }                             }                             cmd.Parameters.Clear();                         }                         trans.Commit();                     }                     catch                     {                         trans.Rollback();                         throw;                     }                 }             }         }         /// <summary>         /// 执行一条计算查询结果语句，返回查询结果（object）。         /// </summary>         /// <param name="SQLString">计算查询结果语句</param>         /// <returns>查询结果（object）</returns>         public static object GetSingle(string SQLString, params MySqlParameter[] cmdParms)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 using (MySqlCommand cmd = new MySqlCommand())                 {                     try                     {                         PrepareCommand(cmd, connection, null, SQLString, cmdParms);                         object obj = cmd.ExecuteScalar();                         cmd.Parameters.Clear();                         if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))                         {                             return null;                         }                         else                         {                             return obj;                         }                     }                     catch (MySql.Data.MySqlClient.MySqlException e)                     {                         throw e;                     }                 }             }         }           /// <summary>         /// 执行查询语句，返回MySqlDataReader ( 注意：调用该方法后，一定要对MySqlDataReader进行Close )         /// </summary>         /// <param name="strSQL">查询语句</param>         /// <returns>MySqlDataReader</returns>         public static MySqlDataReader ExecuteReader(string SQLString, params MySqlParameter[] cmdParms)         {             MySqlConnection connection = new MySqlConnection(connectionString);             MySqlCommand cmd = new MySqlCommand();             try             {                 PrepareCommand(cmd, connection, null, SQLString, cmdParms);                 MySqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);                 cmd.Parameters.Clear();                 return myReader;             }             catch (MySql.Data.MySqlClient.MySqlException e)             {                 throw e;             }             //          finally             //          {             //              cmd.Dispose();             //              connection.Close();             //          }             }           /// <summary>         /// 执行查询语句，返回DataSet         /// </summary>         /// <param name="SQLString">查询语句</param>         /// <returns>DataSet</returns>         public static DataSet Query(string SQLString, params MySqlParameter[] cmdParms)         {             using (MySqlConnection connection = new MySqlConnection(connectionString))             {                 MySqlCommand cmd = new MySqlCommand();                 PrepareCommand(cmd, connection, null, SQLString, cmdParms);                 using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))                 {                     DataSet ds = new DataSet();                     try                     {                         da.Fill(ds, "ds");                         cmd.Parameters.Clear();                     }                     catch (MySql.Data.MySqlClient.MySqlException ex)                     {                         throw new Exception(ex.Message);                     }                     return ds;                 }             }         }             private static void PrepareCommand(MySqlCommand cmd, MySqlConnection conn, MySqlTransaction trans, string cmdText, MySqlParameter[] cmdParms)         {             if (conn.State != ConnectionState.Open)                 conn.Open();             cmd.Connection = conn;             cmd.CommandText = cmdText;             if (trans != null)                 cmd.Transaction = trans;             cmd.CommandType = CommandType.Text;//cmdType;             if (cmdParms != null)             {                     foreach (MySqlParameter parameter in cmdParms)                 {                     if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&                         (parameter.Value == null))                     {                         parameter.Value = DBNull.Value;                     }                     cmd.Parameters.Add(parameter);                 }             }         }           #endregion                   }   }

　　

CommandInfo.cs

　　

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using System; using System.Collections.Generic; using System.Text; using System.Data.SqlClient; namespace CMT.DBUtility {     public enum EffentNextType     {         /// <summary>         /// 对其他语句无任何影响         /// </summary>         None,         /// <summary>         /// 当前语句必须为"select count(1) from .."格式，如果存在则继续执行，不存在回滚事务         /// </summary>         WhenHaveContine,         /// <summary>         /// 当前语句必须为"select count(1) from .."格式，如果不存在则继续执行，存在回滚事务         /// </summary>         WhenNoHaveContine,         /// <summary>         /// 当前语句影响到的行数必须大于0，否则回滚事务         /// </summary>         ExcuteEffectRows,         /// <summary>         /// 引发事件-当前语句必须为"select count(1) from .."格式，如果不存在则继续执行，存在回滚事务         /// </summary>         SolicitationEvent     }       public class CommandInfo     {         public object ShareObject = null;         public object OriginalData = null;         event EventHandler _solicitationEvent;         public event EventHandler SolicitationEvent         {             add             {                 _solicitationEvent += value;             }             remove             {                 _solicitationEvent -= value;             }         }         public void OnSolicitationEvent()         {             if (_solicitationEvent != null)             {                 _solicitationEvent(this,new EventArgs());             }         }         public string CommandText;         public System.Data.Common.DbParameter[] Parameters;         public EffentNextType EffentNextType = EffentNextType.None;         public CommandInfo()         {           }         public CommandInfo(string sqlText, SqlParameter[] para)         {             this.CommandText = sqlText;             this.Parameters = para;         }         public CommandInfo(string sqlText, SqlParameter[] para, EffentNextType type)         {             this.CommandText = sqlText;             this.Parameters = para;             this.EffentNextType = type;         }     } }