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>