自用类库整理之SqlHelper和MySqlHelper

自用类库整理之SqlHelper和MySqlHelper

自用的SQLHelper和MySqlHelper，除一些通用方法外，封装了一些很实用的批量操作方法，简单介绍下

SqlHelper

• ExecuteEmptyDataTable
  获取空表结构，主要用于需要构造DataTable进行大批量数据插入时使用
• BulkInsert
  大批量数据插入,使用SqlBulkCopy进行大批量数据导入,仅提供了DataTable方式,需要DataReader的请自行重载
• BatchDelete、BatchUpdate
  批量数据更新、插入,使用SqlDataAdapter实现，需要进行较大数据量更新、插入时可以使用此方法，性能还不错BatchUpdate,BatchDelete:分批次批量删除、更新数据,此方法应用场景较少,用于需要删除、更新大量数据的同时不造成数据库阻塞且不影响数据库订阅、复制延时等
• ExecutePageDataTable
  通用的分页方法，提供了CTE表达式的支持
• SqlHelperExtension.cs(ExecuteObject、ExecuteObjects)
  提供了泛型获取对象方法支持,依赖依赖AutoMapper.dll实现，非常在意性能的慎用
• SqlHelperSchemaExtension.cs
  SqlServer获取数据库、表、索引信息的封装，可以用来辅助写自己的代码生成器，查看数据库索引之类的

MySqlHelper

• ExecuteEmptyDataTable
  获取空表结构，主要用于需要构造DataTable进行大批量数据插入时使用
• BulkInsert
  使用MySqlBulkLoader进行大批量数据导入,仅提供了DataTable方式,需要DataReader的请自行重载
• BatchUpdate
  批量数据更新、插入,使用MySqlDataAdapter实现，需要进行较大数据量更新、插入时可以使用此方法，性能还不错
• MySqlHelperExtension.csExecuteObject、ExecuteObjects
  提供了泛型获取对象方法支持,依赖依赖AutoMapper.dll实现，非常在意性能的慎用

 

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

namespace Helpers
{
/// <summary>
/// SqlHelper操作类
/// </summary>
public sealed partial class SqlHelper
{
/// <summary>
/// 批量操作每批次记录数
/// </summary>
public static int BatchSize = 2000;

/// <summary>
/// 超时时间
/// </summary>
public static int CommandTimeOut = 600;

/// <summary>
///初始化SqlHelper实例
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
public SqlHelper(string connectionString)
{
this.ConnectionString = connectionString;
}

/// <summary>
/// 数据库连接字符串
/// </summary>
public string ConnectionString { get; set; }

#region 实例方法

#region ExecuteNonQuery

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <param name="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>返回影响的行数</returns>
public int ExecuteNonQuery(string commandText, params SqlParameter[] parms)
{
return ExecuteNonQuery(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <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>返回影响的行数</returns>
public int ExecuteNonQuery(CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteNonQuery(ConnectionString, commandType, commandText, parms);
}

#endregion ExecuteNonQuery

#region ExecuteScalar

/// <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 T ExecuteScalar<T>(string commandText, params SqlParameter[] parms)
{
return ExecuteScalar<T>(ConnectionString, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </summary>
/// <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 object ExecuteScalar(string commandText, params SqlParameter[] parms)
{
return ExecuteScalar(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </summary>
/// <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行第一列</returns>
public object ExecuteScalar(CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteScalar(ConnectionString, commandType, commandText, parms);
}

#endregion ExecuteScalar

#region ExecuteDataReader

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <param name="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>返回只读数据集</returns>
private SqlDataReader ExecuteDataReader(string commandText, params SqlParameter[] parms)
{
return ExecuteDataReader(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <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>返回只读数据集</returns>
private SqlDataReader ExecuteDataReader(CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteDataReader(ConnectionString, commandType, commandText, parms);
}
#endregion

#region ExecuteDataRow

/// <summary>
/// 执行SQL语句,返回结果集中的第一行
/// </summary>
/// <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</returns>
public DataRow ExecuteDataRow(string commandText, params SqlParameter[] parms)
{
return ExecuteDataRow(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行
/// </summary>
/// <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行</returns>
public DataRow ExecuteDataRow(CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteDataRow(ConnectionString, commandType, commandText, parms);
}

#endregion ExecuteDataRow

#region ExecuteDataTable

/// <summary>
/// 执行SQL语句,返回结果集中的第一个数据表
/// </summary>
/// <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个数据表</returns>
public DataTable ExecuteDataTable(string commandText, params SqlParameter[] parms)
{
return ExecuteDataTable(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一个数据表
/// </summary>
/// <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 DataTable ExecuteDataTable(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="sql">SQL语句</param>
/// <param name="order">排序SQL,如"ORDER BY ID DESC"</param>
/// <param name="pageSize">每页记录数</param>
/// <param name="pageIndex">页索引</param>
/// <param name="parms">查询参数</param>
/// <param name="query">查询SQL</param>
/// <returns></returns>
public DataTable ExecutePageDataTable(string sql, string order, int pageSize, int pageIndex, SqlParameter[] parms = null, string query = null, string cte = null)
{
return ExecutePageDataTable(sql, order, pageSize, pageIndex, parms, query, cte);
}
#endregion ExecuteDataTable

#region ExecuteDataSet

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <param name="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>返回结果集</returns>
public DataSet ExecuteDataSet(string commandText, params SqlParameter[] parms)
{
return ExecuteDataSet(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <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</returns>
public DataSet ExecuteDataSet(CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteDataSet(ConnectionString, commandType, commandText, parms);
}

#endregion ExecuteDataSet

#region 批量操作

/// <summary>
/// 大批量数据插入
/// </summary>
/// <param name="table">数据表</param>
public void BulkInsert(DataTable table)
{
BulkInsert(ConnectionString, table);
}

/// <summary>
/// 使用MySqlDataAdapter批量更新数据
/// </summary>
/// <param name="table">数据表</param>
public void BatchUpdate(DataTable table)
{
BatchUpdate(ConnectionString, table);
}

/// <summary>
/// 分批次批量删除数据
/// </summary>
/// <param name="sql">SQL语句</param>
/// <param name="batchSize">每批次删除记录行数</param>
/// <param name="interval">批次执行间隔(秒)</param>
public void BatchDelete(string sql, int batchSize = 1000, int interval = 1)
{
BatchDelete(ConnectionString, sql, batchSize, interval);
}

/// <summary>
/// 分批次批量更新数据
/// </summary>
/// <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 void BatchUpdate(string sql, int batchSize = 1000, int interval = 1)
{
BatchUpdate(ConnectionString, sql, batchSize, interval);
}

#endregion 批量操作

#endregion 实例方法

#region 静态方法

private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] parms)
{
if (connection.State != ConnectionState.Open) connection.Open();

command.Connection = connection;
command.CommandTimeout = CommandTimeOut;
// 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)
{
command.Transaction = transaction;
}
// 设置命令类型.
command.CommandType = commandType;
if (parms != null && parms.Length > 0)
{
//预处理SqlParameter参数数组，将为NULL的参数赋值为DBNull.Value;
foreach (SqlParameter parameter in parms)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) && (parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
}
command.Parameters.AddRange(parms);
}
}

#region ExecuteNonQuery

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <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>返回影响的行数</returns>
public static int ExecuteNonQuery(string connectionString, string commandText, params SqlParameter[] parms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
return ExecuteNonQuery(connection, CommandType.Text, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </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>返回影响的行数</returns>
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] parms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
return ExecuteNonQuery(connection, commandType, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </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>返回影响的行数</returns>
public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteNonQuery(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <param name="transaction">事务</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>返回影响的行数</returns>
public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteNonQuery(transaction.Connection, transaction, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">事务</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>返回影响的行数</returns>
private static int ExecuteNonQuery(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
SqlCommand command = new SqlCommand();
PrepareCommand(command, connection, transaction, commandType, commandText, parms);
int retval = command.ExecuteNonQuery();
command.Parameters.Clear();
return retval;
}

#endregion ExecuteNonQuery

#region ExecuteScalar

/// <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>
/// <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 object ExecuteScalar(string connectionString, string commandText, params SqlParameter[] parms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
return ExecuteScalar(connection, CommandType.Text, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </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行第一列</returns>
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] parms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
return ExecuteScalar(connection, commandType, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </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行第一列</returns>
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteScalar(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </summary>
/// <param name="transaction">事务</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行第一列</returns>
public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteScalar(transaction.Connection, transaction, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">事务</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行第一列</returns>
private static object ExecuteScalar(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
SqlCommand command = new SqlCommand();
PrepareCommand(command, connection, transaction, commandType, commandText, parms);
object retval = command.ExecuteScalar();
command.Parameters.Clear();
return retval;
}

#endregion ExecuteScalar

#region ExecuteDataReader

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>返回只读数据集</returns>
private static SqlDataReader ExecuteDataReader(string connectionString, string commandText, params SqlParameter[] parms)
{
SqlConnection connection = new SqlConnection(connectionString);
return ExecuteDataReader(connection, null, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </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>返回只读数据集</returns>
private static SqlDataReader ExecuteDataReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] parms)
{
SqlConnection connection = new SqlConnection(connectionString);
return ExecuteDataReader(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </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>返回只读数据集</returns>
private static SqlDataReader ExecuteDataReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteDataReader(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <param name="transaction">事务</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>返回只读数据集</returns>
private static SqlDataReader ExecuteDataReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteDataReader(transaction.Connection, transaction, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">事务</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>返回只读数据集</returns>
private static SqlDataReader ExecuteDataReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
SqlCommand command = new SqlCommand();
PrepareCommand(command, connection, transaction, commandType, commandText, parms);
return command.ExecuteReader(CommandBehavior.CloseConnection);
}

#endregion

#region ExecuteDataRow

/// <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="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>,返回结果集中的第一行</returns>
public static DataRow ExecuteDataRow(string connectionString, string commandText, params SqlParameter[] parms)
{
DataTable dt = ExecuteDataTable(connectionString, CommandType.Text, 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行</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行</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;
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行
/// </summary>
/// <param name="transaction">事务</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行</returns>
public static DataRow ExecuteDataRow(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
DataTable dt = ExecuteDataTable(transaction, commandType, commandText, parms);
return dt.Rows.Count > 0 ? dt.Rows[0] : null;
}

#endregion ExecuteDataRow

#region ExecuteDataTable

/// <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="commandText">SQL语句</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, string commandText, params SqlParameter[] parms)
{
return ExecuteDataSet(connectionString, CommandType.Text, 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];
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一个数据表
/// </summary>
/// <param name="transaction">事务</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(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteDataSet(transaction, commandType, commandText, parms).Tables[0];
}

/// <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];
}

/// <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="sql">SQL语句</param>
/// <param name="order">排序SQL,如"ORDER BY ID DESC"</param>
/// <param name="pageSize">每页记录数</param>
/// <param name="pageIndex">页索引</param>
/// <param name="parms">查询参数</param>
/// <param name="query">查询SQL</param>
/// <param name="cte">CTE表达式</param>
/// <returns></returns>
public static DataTable ExecutePageDataTable(string connectionString, string sql, string order, int pageSize, int pageIndex, SqlParameter[] parms = null, string query = null, string cte = null)
{
string psql = string.Format(@"
{3}
SELECT *
FROM (
SELECT ROW_NUMBER() OVER (ORDER BY {1}) RowNumber,*
FROM (
{0}
) t
WHERE 1 = 1 {2}
) t
WHERE RowNumber BETWEEN @RowNumber_Begin
AND @RowNumber_End", sql, order, query, cte);

List<SqlParameter> paramlist = new List<SqlParameter>()
{
new SqlParameter("@RowNumber_Begin", SqlDbType.Int){ Value = (pageIndex - 1) * pageSize + 1 },
new SqlParameter("@RowNumber_End", SqlDbType.Int){ Value = pageIndex * pageSize }
};
if (parms != null) paramlist.AddRange(parms);
return ExecuteDataTable(connectionString, psql, paramlist.ToArray());
}

#endregion ExecuteDataTable

#region ExecuteDataSet

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <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</returns>
public static DataSet ExecuteDataSet(string connectionString, string commandText, params SqlParameter[] parms)
{
return ExecuteDataSet(connectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </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</returns>
public static DataSet ExecuteDataSet(string connectionString, CommandType commandType, string commandText, params SqlParameter[] parms)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
return ExecuteDataSet(connection, commandType, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </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</returns>
public static DataSet ExecuteDataSet(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteDataSet(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <param name="transaction">事务</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</returns>
public static DataSet ExecuteDataSet(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
return ExecuteDataSet(transaction.Connection, transaction, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">事务</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</returns>
private static DataSet ExecuteDataSet(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] parms)
{
SqlCommand command = new SqlCommand();

PrepareCommand(command, connection, transaction, commandType, commandText, parms);
SqlDataAdapter adapter = new SqlDataAdapter(command);

DataSet ds = new DataSet();
adapter.Fill(ds);
if (commandText.IndexOf("@") > 0)
{
commandText = commandText.ToLower();
int index = commandText.IndexOf("where ");
if (index < 0)
{
index = commandText.IndexOf(" where");
}
if (index > 0)
{
ds.ExtendedProperties.Add("SQL", commandText.Substring(0, index - 1)); //将获取的语句保存在表的一个附属数组里，方便更新时生成CommandBuilder
}
else
{
ds.ExtendedProperties.Add("SQL", commandText); //将获取的语句保存在表的一个附属数组里，方便更新时生成CommandBuilder
}
}
else
{
ds.ExtendedProperties.Add("SQL", commandText); //将获取的语句保存在表的一个附属数组里，方便更新时生成CommandBuilder
}

foreach (DataTable dt in ds.Tables)
{
dt.ExtendedProperties.Add("SQL", ds.ExtendedProperties["SQL"]);
}

command.Parameters.Clear();
return ds;
}

#endregion ExecuteDataSet

#region 批量操作

/// <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 (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="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)
{
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, @"[ws.=,']*from", "select top 1 1 from", RegexOptions.IgnoreCase);
existsSql = Regex.Replace(existsSql, @"set[ws.=,']* 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

#endregion 静态方法
}
}

SqlHelper.cs

 

using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Collections.Generic;
using System.Threading;
using System.Text.RegularExpressions;
namespace Helpers
{
/// <summary>
/// SqlHelper扩展(依赖AutoMapper.dll)
/// </summary>
public sealed partial class SqlHelper
{

#region 实例方法

public T ExecuteObject<T>(string commandText, params SqlParameter[] parms)
{
return ExecuteObject<T>(this.ConnectionString, commandText, parms);
}

public List<T> ExecuteObjects<T>(string commandText, params SqlParameter[] parms)
{
return ExecuteObjects<T>(this.ConnectionString, commandText, parms);
}

#endregion

#region 静态方法

public static T ExecuteObject<T>(string connectionString, string commandText, params SqlParameter[] parms)
{
//DataTable dt = ExecuteDataTable(connectionString, commandText, parms);
//return AutoMapper.Mapper.DynamicMap<List<T>>(dt.CreateDataReader()).FirstOrDefault();
using (SqlDataReader reader = ExecuteDataReader(connectionString, commandText, parms))
{
return AutoMapper.Mapper.DynamicMap<List<T>>(reader).FirstOrDefault();
}
}

public static List<T> ExecuteObjects<T>(string connectionString, string commandText, params SqlParameter[] parms)
{
//DataTable dt = ExecuteDataTable(connectionString, commandText, parms);
//return AutoMapper.Mapper.DynamicMap<List<T>>(dt.CreateDataReader());
using (SqlDataReader reader = ExecuteDataReader(connectionString, commandText, parms))
{
return AutoMapper.Mapper.DynamicMap<List<T>>(reader);
}
}

#endregion
}

}

SqlHelperExtension.cs

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace Helpers
{
public sealed partial class SqlHelper
{
#region Schema 数据库结构
/// <summary>
/// 执行指定数据库连接字符串的命令,返回服务器数据库名称数组
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <returns></returns>
public string[] GetDatabases(string connectionString)
{
string sql = "select name from sys.databases where name not in ('master','model','msdb','tempdb')";
DataTable dt = ExecuteDataTable(connectionString, sql);
return dt.Rows.Cast<DataRow>().Select(row => row["name"].ToString()).ToArray();
}
/// <summary>
/// 执行指定数据库连接字符串的命令,返回指定数据库的表信息
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="database"></param>
/// <returns></returns>
public List<DbTable> GetDbTables(string connectionString, string database)
{
#region SQL
string sql = string.Format(@"SELECT
obj.name tablename,
schem.name schemname,
idx.rows,
CAST
(
CASE
WHEN (SELECT COUNT(1) FROM sys.indexes WHERE object_id= obj.OBJECT_ID AND is_primary_key=1) >=1 THEN 1
ELSE 0
END
AS BIT) HasPrimaryKey
from {0}.sys.objects obj
inner join {0}.dbo.sysindexes idx on obj.object_id=idx.id and idx.indid<=1
INNER JOIN {0}.sys.schemas schem ON obj.schema_id=schem.schema_id
where type='U'
order by obj.name", database);
#endregion
DataTable dt = ExecuteDataTable(connectionString.Replace("master", database), sql);
return dt.Rows.Cast<DataRow>().Select(row => new DbTable
{
TableName = row.Field<string>("tablename"),
SchemaName = row.Field<string>("schemname"),
Rows = row.Field<int>("rows"),
HasPrimaryKey = row.Field<bool>("HasPrimaryKey")
}).ToList();
}
/// <summary>
/// 执行指定数据库连接字符串的命令,返回指定数据库、表的字段信息
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="database"></param>
/// <param name="tableName"></param>
/// <param name="schema"></param>
/// <returns></returns>
public List<DbColumn> GetDbColumns(string connectionString, string database, string tableName, string schema = "dbo")
{
#region SQL
string sql = string.Format(@"
WITH indexCTE AS
(
SELECT
ic.column_id,
ic.index_column_id,
ic.object_id
FROM {0}.sys.indexes idx
INNER JOIN {0}.sys.index_columns ic ON idx.index_id = ic.index_id AND idx.object_id = ic.object_id
WHERE idx.object_id =OBJECT_ID(@tableName) AND idx.is_primary_key=1
)
select
colm.column_id ColumnID,
CAST(CASE WHEN indexCTE.column_id IS NULL THEN 0 ELSE 1 END AS BIT) IsPrimaryKey,
colm.name ColumnName,
systype.name ColumnType,
colm.is_identity IsIdentity,
colm.is_nullable IsNullable,
cast(colm.max_length as int) ByteLength,
(
case
when systype.name='nvarchar' and colm.max_length>0 then colm.max_length/2
when systype.name='nchar' and colm.max_length>0 then colm.max_length/2
when systype.name='ntext' and colm.max_length>0 then colm.max_length/2
else colm.max_length
end
) CharLength,
cast(colm.precision as int) Precision,
cast(colm.scale as int) Scale,
prop.value Remark
from {0}.sys.columns colm
inner join {0}.sys.types systype on colm.system_type_id=systype.system_type_id and colm.user_type_id=systype.user_type_id
left join {0}.sys.extended_properties prop on colm.object_id=prop.major_id and colm.column_id=prop.minor_id
LEFT JOIN indexCTE ON colm.column_id=indexCTE.column_id AND colm.object_id=indexCTE.object_id
where colm.object_id=OBJECT_ID(@tableName)
order by colm.column_id", database);
#endregion
SqlParameter param = new SqlParameter("@tableName", SqlDbType.NVarChar, 100) { Value = string.Format("{0}.{1}.{2}", database, schema, tableName) };
DataTable dt = ExecuteDataTable(connectionString, sql, param);
return dt.Rows.Cast<DataRow>().Select(row => new DbColumn()
{
ColumnID = row.Field<int>("ColumnID"),
IsPrimaryKey = row.Field<bool>("IsPrimaryKey"),
ColumnName = row.Field<string>("ColumnName"),
ColumnType = row.Field<string>("ColumnType"),
IsIdentity = row.Field<bool>("IsIdentity"),
IsNullable = row.Field<bool>("IsNullable"),
ByteLength = row.Field<int>("ByteLength"),
CharLength = row.Field<int>("CharLength"),
Scale = row.Field<int>("Scale"),
Remark = row["Remark"].ToString()
}).ToList();
}
/// <summary>
/// 执行指定数据库连接字符串的命令,返回指定数据库、表的索引信息
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="database"></param>
/// <param name="tableName"></param>
/// <param name="schema"></param>
/// <returns></returns>
public List<DbIndex> GetDbIndexs(string connectionString, string database, string tableName, string schema = "dbo")
{
#region SQL
string sql = string.Format(@"
select
idx.name IndexName
,idx.type_desc IndexType
,idx.is_primary_key IsPrimaryKey
,idx.is_unique IsUnique
,idx.is_unique_constraint IsUniqueConstraint
,STUFF(
(
SELECT ','+c.name from {0}.sys.index_columns ic
inner join {0}.sys.columns c on ic.column_id=c.column_id and ic.object_id=c.object_id
WHERE ic.is_included_column = 0 and ic.index_id=idx.index_id AND ic.object_id=idx.object_id
ORDER BY ic.key_ordinal
FOR XML PATH('')
),1,1,'') IndexColumns
,STUFF(
(
SELECT ','+c.name from {0}.sys.index_columns ic
inner join {0}.sys.columns c on ic.column_id=c.column_id and ic.object_id=c.object_id
WHERE ic.is_included_column = 1 and ic.index_id=idx.index_id AND ic.object_id=idx.object_id
ORDER BY ic.key_ordinal
FOR XML PATH('')
),1,1,'') IncludeColumns
from {0}.sys.indexes idx
where object_id =OBJECT_ID(@tableName)", database);
#endregion
SqlParameter param = new SqlParameter("@tableName", SqlDbType.NVarChar, 100) { Value = string.Format("{0}.{1}.{2}", database, schema, tableName) };
DataTable dt = ExecuteDataTable(connectionString, sql, param);
return dt.Rows.Cast<DataRow>().Select(row => new DbIndex()
{
IndexName = row.Field<string>("IndexName"),
IndexType = row.Field<string>("IndexType"),
IsPrimaryKey = row.Field<bool>("IsPrimaryKey"),
IsUnique = row.Field<bool>("IsUnique"),
IsUniqueConstraint = row.Field<bool>("IsUniqueConstraint"),
IndexColumns = row.Field<string>("IndexColumns"),
IncludeColumns = row.Field<string>("IncludeColumns")
}).ToList();
}
#endregion
}

/// <summary>
/// 表索引结构
/// </summary>
public sealed class DbIndex
{
/// <summary>
/// 索引名称
/// </summary>
public string IndexName { get; set; }
/// <summary>
/// 索引类型
/// </summary>
public string IndexType { get; set; }
/// <summary>
/// 是否为主键
/// </summary>
public bool IsPrimaryKey { get; set; }

/// <summary>
/// 是否唯一索引
/// </summary>
public bool IsUnique { get; set; }
/// <summary>
/// 是否唯一约束
/// </summary>
public bool IsUniqueConstraint { get; set; }
/// <summary>
/// 索引列
/// </summary>
public string IndexColumns { get; set; }

/// <summary>
/// 覆盖索引列
/// </summary>
public string IncludeColumns { get; set; }
}

/// <summary>
/// 表结构
/// </summary>
public sealed class DbTable
{
/// <summary>
/// 表名称
/// </summary>
public string TableName { get; set; }
/// <summary>
/// 表的架构
/// </summary>
public string SchemaName { get; set; }
/// <summary>
/// 表的记录数
/// </summary>
public int Rows { get; set; }

/// <summary>
/// 是否含有主键
/// </summary>
public bool HasPrimaryKey { get; set; }
}

/// <summary>
/// 表字段结构
/// </summary>
public sealed class DbColumn
{
/// <summary>
/// 字段ID
/// </summary>
public int ColumnID { get; set; }

/// <summary>
/// 是否主键
/// </summary>
public bool IsPrimaryKey { get; set; }

/// <summary>
/// 字段名称
/// </summary>
public string ColumnName { get; set; }

/// <summary>
/// 字段类型
/// </summary>
public string ColumnType { get; set; }

/// <summary>
/// 数据库类型对应的C#类型
/// </summary>
public string CSharpType
{
get
{
return SqlMap.MapCsharpType(ColumnType);
}
}

/// <summary>
///
/// </summary>
public Type CommonType
{
get
{
return SqlMap.MapCommonType(ColumnType);
}
}

/// <summary>
/// 字节长度
/// </summary>
public int ByteLength { get; set; }

/// <summary>
/// 字符长度
/// </summary>
public int CharLength { get; set; }

/// <summary>
/// 小数位
/// </summary>
public int Scale { get; set; }

/// <summary>
/// 是否自增列
/// </summary>
public bool IsIdentity { get; set; }

/// <summary>
/// 是否允许空
/// </summary>
public bool IsNullable { get; set; }

/// <summary>
/// 描述
/// </summary>
public string Remark { get; set; }
}

public class SqlMap
{
public static string MapCsharpType(string dbtype)
{
if (string.IsNullOrEmpty(dbtype)) return dbtype;
dbtype = dbtype.ToLower();
string csharpType = "object";
switch (dbtype)
{
case "bigint": csharpType = "long"; break;
case "binary": csharpType = "byte[]"; break;
case "bit": csharpType = "bool"; break;
case "char": csharpType = "string"; break;
case "date": csharpType = "DateTime"; break;
case "datetime": csharpType = "DateTime"; break;
case "datetime2": csharpType = "DateTime"; break;
case "datetimeoffset": csharpType = "DateTimeOffset"; break;
case "decimal": csharpType = "decimal"; break;
case "float": csharpType = "double"; break;
case "image": csharpType = "byte[]"; break;
case "int": csharpType = "int"; break;
case "money": csharpType = "decimal"; break;
case "nchar": csharpType = "string"; break;
case "ntext": csharpType = "string"; break;
case "numeric": csharpType = "decimal"; break;
case "nvarchar": csharpType = "string"; break;
case "real": csharpType = "Single"; break;
case "smalldatetime": csharpType = "DateTime"; break;
case "smallint": csharpType = "short"; break;
case "smallmoney": csharpType = "decimal"; break;
case "sql_variant": csharpType = "object"; break;
case "sysname": csharpType = "object"; break;
case "text": csharpType = "string"; break;
case "time": csharpType = "TimeSpan"; break;
case "timestamp": csharpType = "byte[]"; break;
case "tinyint": csharpType = "byte"; break;
case "uniqueidentifier": csharpType = "Guid"; break;
case "varbinary": csharpType = "byte[]"; break;
case "varchar": csharpType = "string"; break;
case "xml": csharpType = "string"; break;
default: csharpType = "object"; break;
}
return csharpType;
}

public static Type MapCommonType(string dbtype)
{
if (string.IsNullOrEmpty(dbtype)) return Type.Missing.GetType();
dbtype = dbtype.ToLower();
Type commonType = typeof(object);
switch (dbtype)
{
case "bigint": commonType = typeof(long); break;
case "binary": commonType = typeof(byte[]); break;
case "bit": commonType = typeof(bool); break;
case "char": commonType = typeof(string); break;
case "date": commonType = typeof(DateTime); break;
case "datetime": commonType = typeof(DateTime); break;
case "datetime2": commonType = typeof(DateTime); break;
case "datetimeoffset": commonType = typeof(DateTimeOffset); break;
case "decimal": commonType = typeof(decimal); break;
case "float": commonType = typeof(double); break;
case "image": commonType = typeof(byte[]); break;
case "int": commonType = typeof(int); break;
case "money": commonType = typeof(decimal); break;
case "nchar": commonType = typeof(string); break;
case "ntext": commonType = typeof(string); break;
case "numeric": commonType = typeof(decimal); break;
case "nvarchar": commonType = typeof(string); break;
case "real": commonType = typeof(Single); break;
case "smalldatetime": commonType = typeof(DateTime); break;
case "smallint": commonType = typeof(short); break;
case "smallmoney": commonType = typeof(decimal); break;
case "sql_variant": commonType = typeof(object); break;
case "sysname": commonType = typeof(object); break;
case "text": commonType = typeof(string); break;
case "time": commonType = typeof(TimeSpan); break;
case "timestamp": commonType = typeof(byte[]); break;
case "tinyint": commonType = typeof(byte); break;
case "uniqueidentifier": commonType = typeof(Guid); break;
case "varbinary": commonType = typeof(byte[]); break;
case "varchar": commonType = typeof(string); break;
case "xml": commonType = typeof(string); break;
default: commonType = typeof(object); break;
}
return commonType;
}
}
}

SqlHelperSchemaExtension.cs

 

using System;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using MySql.Data.MySqlClient;

namespace Helpers
{
/// <summary>
/// MySqlHelper操作类
/// </summary>
public sealed partial class MySqlHelper
{
/// <summary>
/// 批量操作每批次记录数
/// </summary>
public static int BatchSize = 2000;

/// <summary>
/// 超时时间
/// </summary>
public static int CommandTimeOut = 600;

/// <summary>
///初始化MySqlHelper实例
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
public MySqlHelper(string connectionString)
{
this.ConnectionString = connectionString;
}

/// <summary>
/// 数据库连接字符串
/// </summary>
public string ConnectionString { get; set; }

#region 实例方法

#region ExecuteNonQuery

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <param name="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>返回影响的行数</returns>
public int ExecuteNonQuery(string commandText, params MySqlParameter[] parms)
{
return ExecuteNonQuery(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <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>返回影响的行数</returns>
public int ExecuteNonQuery(CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteNonQuery(ConnectionString, commandType, commandText, parms);
}

#endregion ExecuteNonQuery

#region ExecuteScalar

/// <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 T ExecuteScalar<T>(string commandText, params MySqlParameter[] parms)
{
return ExecuteScalar<T>(ConnectionString, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </summary>
/// <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 object ExecuteScalar(string commandText, params MySqlParameter[] parms)
{
return ExecuteScalar(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </summary>
/// <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行第一列</returns>
public object ExecuteScalar(CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteScalar(ConnectionString, commandType, commandText, parms);
}

#endregion ExecuteScalar

#region ExecuteDataReader

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <param name="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>返回只读数据集</returns>
private MySqlDataReader ExecuteDataReader(string commandText, params MySqlParameter[] parms)
{
return ExecuteDataReader(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <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>返回只读数据集</returns>
private MySqlDataReader ExecuteDataReader(CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataReader(ConnectionString, commandType, commandText, parms);
}
#endregion

#region ExecuteDataRow

/// <summary>
/// 执行SQL语句,返回结果集中的第一行
/// </summary>
/// <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</returns>
public DataRow ExecuteDataRow(string commandText, params MySqlParameter[] parms)
{
return ExecuteDataRow(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行
/// </summary>
/// <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行</returns>
public DataRow ExecuteDataRow(CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataRow(ConnectionString, commandType, commandText, parms);
}

#endregion ExecuteDataRow

#region ExecuteDataTable

/// <summary>
/// 执行SQL语句,返回结果集中的第一个数据表
/// </summary>
/// <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个数据表</returns>
public DataTable ExecuteDataTable(string commandText, params MySqlParameter[] parms)
{
return ExecuteDataTable(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一个数据表
/// </summary>
/// <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 DataTable ExecuteDataTable(CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataSet(ConnectionString, commandType, commandText, parms).Tables[0];
}

#endregion ExecuteDataTable

#region ExecuteDataSet

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <param name="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>返回结果集</returns>
public DataSet ExecuteDataSet(string commandText, params MySqlParameter[] parms)
{
return ExecuteDataSet(ConnectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <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</returns>
public DataSet ExecuteDataSet(CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataSet(ConnectionString, commandType, commandText, parms);
}

#endregion ExecuteDataSet

#region 批量操作

/// <summary>
/// 使用MySqlDataAdapter批量更新数据
/// </summary>
/// <param name="table">数据表</param>
public void BatchUpdate(DataTable table)
{
BatchUpdate(ConnectionString, table);
}

/// <summary>
///大批量数据插入,返回成功插入行数
/// </summary>
/// <param name="table">数据表</param>
/// <returns>返回成功插入行数</returns>
public int BulkInsert(DataTable table)
{
return BulkInsert(ConnectionString, table);
}

#endregion 批量操作

#endregion 实例方法

#region 静态方法

private static void PrepareCommand(MySqlCommand command, MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, MySqlParameter[] parms)
{
if (connection.State != ConnectionState.Open) connection.Open();

command.Connection = connection;
command.CommandTimeout = CommandTimeOut;
// 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)
{
command.Transaction = transaction;
}
// 设置命令类型.
command.CommandType = commandType;
if (parms != null && parms.Length > 0)
{
//预处理MySqlParameter参数数组，将为NULL的参数赋值为DBNull.Value;
foreach (MySqlParameter parameter in parms)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) && (parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
}
command.Parameters.AddRange(parms);
}
}

#region ExecuteNonQuery

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <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>返回影响的行数</returns>
public static int ExecuteNonQuery(string connectionString, string commandText, params MySqlParameter[] parms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
return ExecuteNonQuery(connection, CommandType.Text, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </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>返回影响的行数</returns>
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
return ExecuteNonQuery(connection, commandType, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </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>返回影响的行数</returns>
public static int ExecuteNonQuery(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteNonQuery(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <param name="transaction">事务</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>返回影响的行数</returns>
public static int ExecuteNonQuery(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteNonQuery(transaction.Connection, transaction, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回影响的行数
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">事务</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>返回影响的行数</returns>
private static int ExecuteNonQuery(MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
MySqlCommand command = new MySqlCommand();
PrepareCommand(command, connection, transaction, commandType, commandText, parms);
int retval = command.ExecuteNonQuery();
command.Parameters.Clear();
return retval;
}

#endregion ExecuteNonQuery

#region ExecuteScalar

/// <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 MySqlParameter[] 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>
/// <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 object ExecuteScalar(string connectionString, string commandText, params MySqlParameter[] parms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
return ExecuteScalar(connection, CommandType.Text, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </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行第一列</returns>
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
return ExecuteScalar(connection, commandType, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </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行第一列</returns>
public static object ExecuteScalar(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteScalar(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </summary>
/// <param name="transaction">事务</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行第一列</returns>
public static object ExecuteScalar(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteScalar(transaction.Connection, transaction, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集中的第一行第一列
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">事务</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行第一列</returns>
private static object ExecuteScalar(MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
MySqlCommand command = new MySqlCommand();
PrepareCommand(command, connection, transaction, commandType, commandText, parms);
object retval = command.ExecuteScalar();
command.Parameters.Clear();
return retval;
}

#endregion ExecuteScalar

#region ExecuteDataReader

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>返回只读数据集</returns>
private static MySqlDataReader ExecuteDataReader(string connectionString, string commandText, params MySqlParameter[] parms)
{
MySqlConnection connection = new MySqlConnection(connectionString);
return ExecuteDataReader(connection, null, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </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>返回只读数据集</returns>
private static MySqlDataReader ExecuteDataReader(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
MySqlConnection connection = new MySqlConnection(connectionString);
return ExecuteDataReader(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </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>返回只读数据集</returns>
private static MySqlDataReader ExecuteDataReader(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataReader(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <param name="transaction">事务</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>返回只读数据集</returns>
private static MySqlDataReader ExecuteDataReader(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataReader(transaction.Connection, transaction, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回只读数据集
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">事务</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>返回只读数据集</returns>
private static MySqlDataReader ExecuteDataReader(MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
MySqlCommand command = new MySqlCommand();
PrepareCommand(command, connection, transaction, commandType, commandText, parms);
return command.ExecuteReader(CommandBehavior.CloseConnection);
}

#endregion

#region ExecuteDataRow

/// <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="commandText">SQL语句</param>
/// <param name="parms">查询参数</param>
/// <returns>,返回结果集中的第一行</returns>
public static DataRow ExecuteDataRow(string connectionString, string commandText, params MySqlParameter[] parms)
{
DataTable dt = ExecuteDataTable(connectionString, CommandType.Text, 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行</returns>
public static DataRow ExecuteDataRow(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] 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行</returns>
public static DataRow ExecuteDataRow(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] 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="transaction">事务</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行</returns>
public static DataRow ExecuteDataRow(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
DataTable dt = ExecuteDataTable(transaction, commandType, commandText, parms);
return dt.Rows.Count > 0 ? dt.Rows[0] : null;
}

#endregion ExecuteDataRow

#region ExecuteDataTable

/// <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="commandText">SQL语句</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, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataSet(connectionString, CommandType.Text, 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 MySqlParameter[] 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(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] 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="transaction">事务</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(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataSet(transaction, 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="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 ExecuteDataTable

#region ExecuteDataSet

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <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</returns>
public static DataSet ExecuteDataSet(string connectionString, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataSet(connectionString, CommandType.Text, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </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</returns>
public static DataSet ExecuteDataSet(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
return ExecuteDataSet(connection, commandType, commandText, parms);
}
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </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</returns>
public static DataSet ExecuteDataSet(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataSet(connection, null, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <param name="transaction">事务</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</returns>
public static DataSet ExecuteDataSet(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
return ExecuteDataSet(transaction.Connection, transaction, commandType, commandText, parms);
}

/// <summary>
/// 执行SQL语句,返回结果集
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="transaction">事务</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</returns>
private static DataSet ExecuteDataSet(MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] parms)
{
MySqlCommand command = new MySqlCommand();

PrepareCommand(command, connection, transaction, commandType, commandText, parms);
MySqlDataAdapter adapter = new MySqlDataAdapter(command);

DataSet ds = new DataSet();
adapter.Fill(ds);
if (commandText.IndexOf("@") > 0)
{
commandText = commandText.ToLower();
int index = commandText.IndexOf("where ");
if (index < 0)
{
index = commandText.IndexOf(" where");
}
if (index > 0)
{
ds.ExtendedProperties.Add("SQL", commandText.Substring(0, index - 1)); //将获取的语句保存在表的一个附属数组里，方便更新时生成CommandBuilder
}
else
{
ds.ExtendedProperties.Add("SQL", commandText); //将获取的语句保存在表的一个附属数组里，方便更新时生成CommandBuilder
}
}
else
{
ds.ExtendedProperties.Add("SQL", commandText); //将获取的语句保存在表的一个附属数组里，方便更新时生成CommandBuilder
}

foreach (DataTable dt in ds.Tables)
{
dt.ExtendedProperties.Add("SQL", ds.ExtendedProperties["SQL"]);
}

command.Parameters.Clear();
return ds;
}

#endregion ExecuteDataSet

#region 批量操作

/// <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)
{
MySqlConnection connection = new MySqlConnection(connectionString);

MySqlCommand command = connection.CreateCommand();
command.CommandTimeout = CommandTimeOut;
command.CommandType = CommandType.Text;
MySqlDataAdapter adapter = new MySqlDataAdapter(command);
MySqlCommandBuilder commandBulider = new MySqlCommandBuilder(adapter);
commandBulider.ConflictOption = ConflictOption.OverwriteChanges;

MySqlTransaction 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 (MySqlException ex)
{
if (transaction != null) transaction.Rollback();
throw ex;
}
finally
{
connection.Close();
connection.Dispose();
}
}

/// <summary>
///大批量数据插入,返回成功插入行数
/// </summary>
/// <param name="connectionString">数据库连接字符串</param>
/// <param name="table">数据表</param>
/// <returns>返回成功插入行数</returns>
public static int BulkInsert(string connectionString, DataTable table)
{
if (string.IsNullOrEmpty(table.TableName)) throw new Exception("请给DataTable的TableName属性附上表名称");
if (table.Rows.Count == 0) return 0;
int insertCount = 0;
string tmpPath = Path.GetTempFileName();
string csv = DataTableToCsv(table);
File.WriteAllText(tmpPath, csv);
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
MySqlTransaction tran = null;
try
{
conn.Open();
tran = conn.BeginTransaction();
MySqlBulkLoader bulk = new MySqlBulkLoader(conn)
{
FieldTerminator = ",",
FieldQuotationCharacter = '"',
EscapeCharacter = '"',
LineTerminator = " ",
FileName = tmpPath,
NumberOfLinesToSkip = 0,
TableName = table.TableName,
};
bulk.Columns.AddRange(table.Columns.Cast<DataColumn>().Select(colum => colum.ColumnName).ToList());
insertCount = bulk.Load();
tran.Commit();
}
catch (MySqlException ex)
{
if (tran != null) tran.Rollback();
throw ex;
}
}
File.Delete(tmpPath);
return insertCount;
}

/// <summary>
///将DataTable转换为标准的CSV
/// </summary>
/// <param name="table">数据表</param>
/// <returns>返回标准的CSV</returns>
private static string DataTableToCsv(DataTable table)
{
//以半角逗号（即,）作分隔符，列为空也要表达其存在。
//列内容如存在半角逗号（即,）则用半角引号（即""）将该字段值包含起来。
//列内容如存在半角引号（即"）则应替换成半角双引号（""）转义，并用半角引号（即""）将该字段值包含起来。
StringBuilder sb = new StringBuilder();
DataColumn colum;
foreach (DataRow row in table.Rows)
{
for (int i = 0; i < table.Columns.Count; i++)
{
colum = table.Columns[i];
if (i != 0) sb.Append(",");
if (colum.DataType == typeof(string) && row[colum].ToString().Contains(","))
{
sb.Append(""" + row[colum].ToString().Replace(""", """") + """);
}
else sb.Append(row[colum].ToString());
}
sb.AppendLine();
}

return sb.ToString();
}

#endregion 批量操作

#endregion 静态方法
}
}

MySqlHelper.cs

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MySql.Data.MySqlClient;
using System.Data;

namespace Helpers
{
/// <summary>
/// MySqlHelper扩展(依赖AutoMapper.dll)
/// </summary>
public sealed partial class MySqlHelper
{
#region 实例方法

public T ExecuteObject<T>(string commandText, params MySqlParameter[] parms)
{
return ExecuteObject<T>(this.ConnectionString, commandText, parms);
}

public List<T> ExecuteObjects<T>(string commandText, params MySqlParameter[] parms)
{
return ExecuteObjects<T>(this.ConnectionString, commandText, parms);
}

#endregion

#region 静态方法

public static T ExecuteObject<T>(string connectionString, string commandText, params MySqlParameter[] parms)
{
//DataTable dt = ExecuteDataTable(connectionString, commandText, parms);
//return AutoMapper.Mapper.DynamicMap<List<T>>(dt.CreateDataReader()).FirstOrDefault();
using (MySqlDataReader reader = ExecuteDataReader(connectionString, commandText, parms))
{
return AutoMapper.Mapper.DynamicMap<List<T>>(reader).FirstOrDefault();
}
}

public static List<T> ExecuteObjects<T>(string connectionString, string commandText, params MySqlParameter[] parms)
{
//DataTable dt = ExecuteDataTable(connectionString, commandText, parms);
//return AutoMapper.Mapper.DynamicMap<List<T>>(dt.CreateDataReader());
using (MySqlDataReader reader = ExecuteDataReader(connectionString, commandText, parms))
{
return AutoMapper.Mapper.DynamicMap<List<T>>(reader);
}
}

#endregion
}

}

MySqlHelperExtension.cs

最后附上文件源码及相关DLL:SQL.rar

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分类: C#