entity framework扩展实战，小项目重构，不折腾

一个控制台程序，MSSQL 2008 数据库，其中一个大表数据超过6000千万，开发时间有限不可能花很多时间设计、架构。使用控制台一是为了实现高效运行，二是程序是在服务器上定时运行无人干预。要保证程序可维护性和快速开发和程序高效运行，没时间去分层开发，直接使用了entity framework并结合ado.net对EF进行了扩展。不折腾是因为怕EF有性能问题使用了sqlbuckcopy进行批量插入数据，使用DB FIRST。重构是因为原来是oracle数据库，数据库已经改为MSSQL 2008。

1、解决方案、架构

解决方案：

2、业务说明

程序主要业务是读取指定目录下面的XML文件，将里面的文件里的记录整理拼凑为数据库里对应表的datatable,然后使用SqlBulkCopy批量插入数据库。文件是远程计算机通过FTP上传的。XML里面的记录和需要存储的数据库里对应表的表结构不一致，需要转换和补全。程序是定时运行，使用操作系统的计划任务进行调度。日志组件使用了log4net，来实现控制台显示和数据库记录日志。

3、关键代码和编码思路

1、业务逻辑实现

2、EF扩展类

using System.Data;
using System.Data.EntityClient;
using System;
using System.Data.SqlClient;
using System.Configuration;
 
namespace XXX_App
{
    public partial class XXX_DBEntities : global::System.Data.Objects.ObjectContext
    {
        Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
        /// <summary>
        /// 使用ado.net执行sqlbulkcopy
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="efConnectStr">webconfig里的数据库连接字符串</param>
        /// <returns></returns>
        public bool ExecuteSqlBulkCopy(DataTable dt)
        {
            string dbConnStr = this.GetEF_ConnectStr2Ado_ConnectStr();
            bool result = false;
            #region ado.net execute sqlbulkcopy
            using (SqlConnection dbConn = new SqlConnection(dbConnStr))
            {
                try
                {
                    #region 执行sqlbulkcopy
                    dbConn.Open();
                    SqlCommand cmd = dbConn.CreateCommand();
                    cmd.CommandText = "delete sc_productsource_temp";                    
                    cmd.ExecuteNonQuery();
                    new SqlBulkCopy(dbConn) 
                    {
                        DestinationTableName = "sc_productsource_temp", 
                        BatchSize = dt.Rows.Count,
                        BulkCopyTimeout = 1800
                    }.WriteToServer(dt);
                    #endregion
                    result = true;
                }
                catch (Exception ex)
                {
                    result = false;
                    throw new Exception(ex.Message);
                }
                finally
                {
                    if (result)
                    {
                        #region 临时表流量明细记录转正式 SC_PRODUCTSOURCE
                        SqlCommand cmd = dbConn.CreateCommand();
                        cmd.CommandText = " INSERT INTO  SC_PRODUCTSOURCE (PRODUCTSOURCEID,FACTORYID,PRDLINEID "+
                                          " ,MACRANDOMCODE    ,PRODUCTBATCHIDX ,LASERDNA_CODE ,PRODUCTNO ,PRODUCTNAME,PRODUCTTYPENAME"+
                                          " ,PRODUCTDATE ,PRINTCODEDT ,FACTORYSHIFTNO ,OUTBOX_DNACODE ,VIRTUALBALECODE" +
                                          " ,SENDTONDC_DT,FAC_NO,PRODUCTVERSION) " +
                                          " SELECT  NEWID() PRODUCTSOURCEID,FACTORYID,PRDLINEID,MACRANDOMCODE,PRODUCTBATCHIDX " +
                                          "      ,LASERDNA_CODE,PRODUCTNO,PRODUCTNAME,PRODUCTTYPENAME,PRODUCTDATE,PRINTCODEDT " +
                                          "      ,FACTORYSHIFTNO,OUTBOX_DNACODE,VIRTUALBALECODE,SENDTONDC_DT,FAC_NO,PRODUCTVERSION " +
                                          " FROM sc_productsource_temp";         
                        cmd.ExecuteNonQuery();
                        #endregion                        
                    }
                    dbConn.Close();
                }
            }
            #endregion
            return result;
        }
 
        /// <summary>
        /// 准备临时表
        /// </summary>
        /// <param name="efConnectStr"></param>
        /// <returns></returns>
        public DataTable GetTmpNewDataTable()
        {
            return this.GetDbHelperSQL_Instance().Query("select * from sc_productsource_temp where 1=2").Tables[0];            
        }
 
        /// <summary>
        /// 将EF的连接字符串转为Ado.net的连接字符串
        /// </summary>
        /// <param name="efConnectStr"></param>
        /// <returns></returns>
        private string GetEF_ConnectStr2Ado_ConnectStr()
        {
            string[] tmpStr = config.ConnectionStrings.ConnectionStrings["XXX_DBEntities"].ConnectionString.Split(";".ToCharArray());
            string dbConnStr = string.Empty;
            if (tmpStr.Length == 8)
            {
                //拼接出新的可用的ado.net连接字符串
                dbConnStr = string.Join(";", new string[] { "Data Source =" + base.Connection.DataSource, tmpStr[3], tmpStr[4], tmpStr[5], tmpStr[6].TrimEnd(new char[] { '"' }) });
                return dbConnStr;
            }
            else
            {
                return string.Empty;
                throw new Exception("请配置数据库连接方式为：sql认证方式;不支持WinNT集成安全方式。");
            }
        }
 
        /// <summary>
        /// 获取第一行第一列数据
        /// </summary>
        /// <param name="efConnectStr"></param>
        /// <param name="sqlTxt"></param>
        /// <returns></returns>
        public string AdoExecuteScalar(string sqlTxt)
        {
            string dbConnStr = this.GetEF_ConnectStr2Ado_ConnectStr();
            using (DbHelperSQL db = new DbHelperSQL(dbConnStr))
            {
                return db.GetSingle(sqlTxt).ToString();
            }
        }
        
        public DbHelperSQL GetDbHelperSQL_Instance()
        { 
            string dbConnStr = this.GetEF_ConnectStr2Ado_ConnectStr();
            return new DbHelperSQL(dbConnStr);
        }
    }
}

3、修改过的动软DbHelper，Ado.net存储类

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Data.Common;
using System.Collections.Generic;
namespace XXX_App
{
    /// <summary>
    /// 数据访问抽象基础类
    /// Copyright (C) Maticsoft 
    /// </summary>
    public class DbHelperSQL : IDisposable
    {
        //数据库连接字符串(web.config来配置)，多数据库可使用DbHelperSQLP来实现.
        private string connectionString;
        /// <summary>
        /// 数据库连接字符串
        /// </summary>
        public string ConnectionString
        {
            get { return connectionString; }
        }
 
        public DbHelperSQL(string connStr)
        {
            connectionString = connStr;
        }
 
        #region 公用方法
        /// <summary>
        /// 判断是否存在某表的某个字段
        /// </summary>
        /// <param name="tableName">表名称</param>
        /// <param name="columnName">列名称</param>
        /// <returns>是否存在</returns>
        public bool ColumnExists(string tableName, string columnName)
        {
            string sql = "select count(1) from syscolumns where [id]=object_id('" + tableName + "') and [name]='" + columnName + "'";
            object res = GetSingle(sql);
            if (res == null)
            {
                return false;
            }
            return Convert.ToInt32(res) > 0;
        }
 
        public 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());
            }
        }
 
        public 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()); //也可能=0
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        /// <summary>
        /// 表是否存在
        /// </summary>
        /// <param name="TableName"></param>
        /// <returns></returns>
        public bool TabExists(string TableName)
        {
            string strsql = "select count(*) from sysobjects where id = object_id(N'[" + TableName + "]') and OBJECTPROPERTY(id, N'IsUserTable') = 1";
            //string strsql = "SELECT count(*) FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[" + TableName + "]') AND type in (N'U')";
            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;
            }
        }
        public bool Exists(string strSql, params SqlParameter[] 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 int ExecuteSql(string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(SQLString, connection))
                {
                    try
                    {
                        connection.Open();
                        int rows = cmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        connection.Close();
                        throw e;
                    }
                }
            }
        }
 
        public int ExecuteSqlByTime(string SQLString, int Times)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(SQLString, connection))
                {
                    try
                    {
                        connection.Open();
                        cmd.CommandTimeout = Times;
                        int rows = cmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        connection.Close();
                        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 int ExecuteSqlTran(List<String> SQLStringList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = conn;
                SqlTransaction 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 int ExecuteSql(string SQLString, string content)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(SQLString, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText);
                myParameter.Value = content;
                cmd.Parameters.Add(myParameter);
                try
                {
                    connection.Open();
                    int rows = cmd.ExecuteNonQuery();
                    return rows;
                }
                catch (System.Data.SqlClient.SqlException 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 object ExecuteSqlGet(string SQLString, string content)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(SQLString, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@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 (System.Data.SqlClient.SqlException 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 int ExecuteSqlInsertImg(string strSQL, byte[] fs)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(strSQL, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@fs", SqlDbType.Image);
                myParameter.Value = fs;
                cmd.Parameters.Add(myParameter);
                try
                {
                    connection.Open();
                    int rows = cmd.ExecuteNonQuery();
                    return rows;
                }
                catch (System.Data.SqlClient.SqlException 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 object GetSingle(string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(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 (System.Data.SqlClient.SqlException e)
                    {
                        connection.Close();
                        throw e;
                    }
                }
            }
        }
        public object GetSingle(string SQLString, int Times)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(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 (System.Data.SqlClient.SqlException e)
                    {
                        connection.Close();
                        throw e;
                    }
                }
            }
        }
        /// <summary>
        /// 执行查询语句，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns>SqlDataReader</returns>
        public SqlDataReader ExecuteReader(string strSQL)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            SqlCommand cmd = new SqlCommand(strSQL, connection);
            try
            {
                connection.Open();
                SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                return myReader;
            }
            catch (System.Data.SqlClient.SqlException 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 DataSet Query(string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                DataSet ds = new DataSet();
                try
                {
                    connection.Open();
                    SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
                    command.Fill(ds, "ds");
                }
                catch (System.Data.SqlClient.SqlException ex)
                {
                    throw new Exception(ex.Message);
                }
                return ds;
            }
        }
        public DataSet Query(string SQLString, int Times)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                DataSet ds = new DataSet();
                try
                {
                    connection.Open();
                    SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
                    command.SelectCommand.CommandTimeout = Times;
                    command.Fill(ds, "ds");
                }
                catch (System.Data.SqlClient.SqlException 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 int ExecuteSql(string SQLString, params SqlParameter[] cmdParms)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    try
                    {
                        PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                        int rows = cmd.ExecuteNonQuery();
                        cmd.Parameters.Clear();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException 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SqlParameter[]）</param>
        public void ExecuteSqlTran(Hashtable SQLStringList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    SqlCommand cmd = new SqlCommand();
                    try
                    {
                        //循环
                        foreach (DictionaryEntry myDE in SQLStringList)
                        {
                            string cmdText = myDE.Key.ToString();
                            SqlParameter[] cmdParms = (SqlParameter[])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SqlParameter[]）</param>
        public int ExecuteSqlTran(System.Collections.Generic.List<CommandInfo> cmdList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    SqlCommand cmd = new SqlCommand();
                    try
                    {
                        int count = 0;
                        //循环
                        foreach (CommandInfo myDE in cmdList)
                        {
                            string cmdText = myDE.CommandText;
                            SqlParameter[] cmdParms = (SqlParameter[])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SqlParameter[]）</param>
        public void ExecuteSqlTranWithIndentity(System.Collections.Generic.List<CommandInfo> SQLStringList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    SqlCommand cmd = new SqlCommand();
                    try
                    {
                        int indentity = 0;
                        //循环
                        foreach (CommandInfo myDE in SQLStringList)
                        {
                            string cmdText = myDE.CommandText;
                            SqlParameter[] cmdParms = (SqlParameter[])myDE.Parameters;
                            foreach (SqlParameter q in cmdParms)
                            {
                                if (q.Direction == ParameterDirection.InputOutput)
                                {
                                    q.Value = indentity;
                                }
                            }
                            PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
                            int val = cmd.ExecuteNonQuery();
                            foreach (SqlParameter 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SqlParameter[]）</param>
        public void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    SqlCommand cmd = new SqlCommand();
                    try
                    {
                        int indentity = 0;
                        //循环
                        foreach (DictionaryEntry myDE in SQLStringList)
                        {
                            string cmdText = myDE.Key.ToString();
                            SqlParameter[] cmdParms = (SqlParameter[])myDE.Value;
                            foreach (SqlParameter q in cmdParms)
                            {
                                if (q.Direction == ParameterDirection.InputOutput)
                                {
                                    q.Value = indentity;
                                }
                            }
                            PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
                            int val = cmd.ExecuteNonQuery();
                            foreach (SqlParameter 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 object GetSingle(string SQLString, params SqlParameter[] cmdParms)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    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 (System.Data.SqlClient.SqlException e)
                    {
                        throw e;
                    }
                }
            }
        }
 
        /// <summary>
        /// 执行查询语句，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns>SqlDataReader</returns>
        public SqlDataReader ExecuteReader(string SQLString, params SqlParameter[] cmdParms)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            SqlCommand cmd = new SqlCommand();
            try
            {
                PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                cmd.Parameters.Clear();
                return myReader;
            }
            catch (System.Data.SqlClient.SqlException 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 DataSet Query(string SQLString, params SqlParameter[] cmdParms)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand();
                PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                {
                    DataSet ds = new DataSet();
                    try
                    {
                        da.Fill(ds, "ds");
                        cmd.Parameters.Clear();
                    }
                    catch (System.Data.SqlClient.SqlException ex)
                    {
                        throw new Exception(ex.Message);
                    }
                    return ds;
                }
            }
        }
 
        private void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] 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 (SqlParameter parameter in cmdParms)
                {
                    if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
                        (parameter.Value == null))
                    {
                        parameter.Value = DBNull.Value;
                    }
                    cmd.Parameters.Add(parameter);
                }
            }
        }
 
        #endregion
 
        #region 存储过程操作
 
        /// <summary>
        /// 执行存储过程，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <returns>SqlDataReader</returns>
        public SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            SqlDataReader returnReader;
            connection.Open();
            SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
            command.CommandType = CommandType.StoredProcedure;
            returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
            return returnReader;
 
        }
 
        /// <summary>
        /// 执行存储过程
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <param name="tableName">DataSet结果中的表名</param>
        /// <returns>DataSet</returns>
        public DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                DataSet dataSet = new DataSet();
                connection.Open();
                SqlDataAdapter sqlDA = new SqlDataAdapter();
                sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
                sqlDA.Fill(dataSet, tableName);
                connection.Close();
                return dataSet;
            }
        }
 
        public DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName, int Times)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                DataSet dataSet = new DataSet();
                connection.Open();
                SqlDataAdapter sqlDA = new SqlDataAdapter();
                sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
                sqlDA.SelectCommand.CommandTimeout = Times;
                sqlDA.Fill(dataSet, tableName);
                connection.Close();
                return dataSet;
            }
        }
 
        /// <summary>
        /// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
        /// </summary>
        /// <param name="connection">数据库连接</param>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <returns>SqlCommand</returns>
        private SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
        {
            SqlCommand command = new SqlCommand(storedProcName, connection);
            command.CommandType = CommandType.StoredProcedure;
            foreach (SqlParameter parameter in parameters)
            {
                if (parameter != null)
                {
                    // 检查未分配值的输出参数,将其分配以DBNull.Value.
                    if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
                        (parameter.Value == null))
                    {
                        parameter.Value = DBNull.Value;
                    }
                    command.Parameters.Add(parameter);
                }
            }
            return command;
        }
 
        /// <summary>
        /// 执行存储过程，返回影响的行数      
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <param name="rowsAffected">影响的行数</param>
        /// <returns></returns>
        public int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                int result;
                connection.Open();
                SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
                rowsAffected = command.ExecuteNonQuery();
                result = (int)command.Parameters["ReturnValue"].Value;            
                return result;
            }
        }
 
        /// <summary>
        /// 创建 SqlCommand 对象实例(用来返回一个整数值)   
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <returns>SqlCommand 对象实例</returns>
        private SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
        {
            SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
            command.Parameters.Add(new SqlParameter("ReturnValue",
                SqlDbType.Int, 4, ParameterDirection.ReturnValue,
                false, 0, 0, string.Empty, DataRowVersion.Default, null));
            return command;
        }
        #endregion
 
        #region IDisposable 成员
 
        public void Dispose()
        {
            connectionString = string.Empty;
        }
 
        #endregion
    }
}

4、EF的使用和扩展类的使用

/// <summary>
        /// 解析并入数据库
        /// </summary>
        /// <param name="ds"></param>
        /// <param name="factoryNo"></param>
        /// <param name="db"></param>
        public static void XmlFile2DataBase(ref DataSet ds, string factoryNo, XXX_DBEntities db)
        {
            var dtProductLine = ds.Tables["line"];
            var dtLinkData = ds.Tables["bc"];
            //出现过xml缺少字段的情况，84K大小的zip包里的xml bc表只有3个字段，没有批号和日期。如果是这个文件跳过。
            if (dtLinkData.Columns.Count != 5)
                return;
            string outBoxNo = dtLinkData.Rows[0]["out"].ToString();
            //检测是否有重复记录，有则忽略,该文件只要有一个箱码重复，说明此文件是重复上传。事务控制到文件。
            decimal cnt = decimal.Parse(db.AdoExecuteScalar(string.Format("select count(*) as cnt from  SC_PRODUCTSOURCE s where s.outbox_dnacode = '{0}'", outBoxNo)).ToString());
            if (cnt > 0)
            {
                return;
            }
            var dt = db.GetTmpNewDataTable();
            #region 准备临时数据,并使用OracleBulkCopy批量插入，每产线插一次
            foreach (DataRow dr in dtProductLine.Rows)
            {
                if (!string.IsNullOrEmpty(dr["pid"].ToString()))
                {
                    dt.Rows.Clear();
                    int prdCode = int.Parse(dr["psid"].ToString());
                    var product = db.ProductInfo.Where(p => p.PRODUCT_CODE == prdCode).FirstOrDefault();
                    string prdName = product.PRODUCT_CNNAME;
                    string prdBrandName = product.PRD_BRAND;
                    DataView dv = dtLinkData.DefaultView;
                    dv.RowFilter = string.Format("data_Id={0}", dr["line_Id"].ToString());
                    foreach (DataRowView itemRow in dv)
                    {
                        string[] itemList = itemRow["bc_Text"].ToString().Split(",".ToCharArray());
                        string batchNo = itemRow["batchno"].ToString();
                        string outBoxNoSub = itemRow["out"].ToString();
                        for (int idx = 0; idx < itemList.Length; idx++)
                        {
                            DateTime dtProduct = new DateTime(1901, 01, 01);
                            DateTime.TryParse(itemRow["maketime"].ToString(), out dtProduct);
                            var drProductLinkData = dt.NewRow();
                            #region 一盒的生产数据
                            drProductLinkData["PRODUCTSOURCEID"] = Guid.NewGuid().ToString("N").ToUpper();
                            drProductLinkData["FACTORYID"] = factoryNo;
                            drProductLinkData["PRDLINEID"] = dr["no"].ToString();
                            drProductLinkData["MACRANDOMCODE"] = itemList[idx];
                            drProductLinkData["PRODUCTBATCHIDX"] = batchNo;
                            drProductLinkData["LASERDNA_CODE"] = "";
                            drProductLinkData["PRODUCTNO"] = int.Parse(dr["psid"].ToString());
                            drProductLinkData["PRODUCTNAME"] = prdName;
                            drProductLinkData["PRODUCTTYPENAME"] = prdBrandName;
                            drProductLinkData["PRODUCTDATE"] = dtProduct;
                            drProductLinkData["PRINTCODEDT"] = dtProduct;
                            drProductLinkData["FACTORYSHIFTNO"] = "";
                            drProductLinkData["OUTBOX_DNACODE"] = outBoxNoSub;
                            drProductLinkData["VIRTUALBALECODE"] = "";
                            drProductLinkData["SENDTONDC_DT"] = DateTime.Now;
                            drProductLinkData["FAC_NO"] = factoryNo;
                            drProductLinkData["PRODUCTVERSION"] = DateTime.Now;
                            #endregion
                            dt.Rows.Add(drProductLinkData);
                        }
                    }
                    if (dt.Rows.Count > 0)
                    {
                        db.ExecuteSqlBulkCopy(dt);
                    }
                }
            }
            #endregion
        }