DBUtility/SQLHelper.cs

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using System;
using System.Configuration;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using System.IO;
using WMPT.Common;
using System.Data.Common;

namespace WMPT.DBUtility
{
    public abstract class SQLHelper
    {
        //数据库连接字符串
        public static string ConnectionString = GetConnectString();

        public static string GetConnectString()
        {
            ConnectionString = ConfigurationManager.ConnectionStrings["conn"].ToString();
            return ConnectionString;
        }

        /// <summary>
        /// 执行一条SQL命令，返回影响的行数
        /// </summary>
        /// <example>
        /// int result = ExecuteNonQuery(CommandType.Text , "Update table1 set field1 = @fild1 where id = @id", myCommandParameters)
        /// </example>
        /// <param name="cmdType">命令字符串类型</param>
        /// <param name="cmdText">命令字符串</param>
        /// <param name="commandParameters">参数</param>
        /// <returns>影响的行数</returns>
        public static int ExecuteNonQuery(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
        {

            SqlCommand cmd = new SqlCommand();

            using (SqlConnection conn = new SqlConnection(ConnectionString))
            {
                PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
                int val = cmd.ExecuteNonQuery();
                cmd.Parameters.Clear();
                return val;
            }
        }

        /// <summary>
        /// 执行一条SQL命令，返回影响的行数
        /// </summary>
        /// <example>
        /// int result = ExecuteNonQuery(myConnection,CommandType.Text , "Update table1 set field1 = @fild1 where id = @id", myCommandParameters)
        /// </example>
        /// <param name="connection">SqlConnection实例</param>
        /// <param name="cmdType">命令字符串类型</param>
        /// <param name="cmdText">命令字符串</param>