MysqlµÄDBHelper.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using MySql.Data.MySqlClient;
namespace i_salesDAL
{
public class DBHelper
{
//Òýµ¼Êý¾Ý¿âÁ¬½ÓÊý¾Ý¿âµ÷ÓÃWeb.ConfigÎļþ
private static MySqlConnection connection;
//´´½¨Á¬½Ó
public static MySqlConnection Connection
{
get
{
MySqlConnection myConn = new MySqlConnection("server=localhost;user id=root;password=root;database=google;CharSet=gb2312;");
string connectionString = myConn.ConnectionString;
if (connection == null)
{
connection = new MySqlConnection(connectionString);
//´ò¿ªÁ¬½Ó
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Closed)
{
connection.Open();
}
else if (connection.State == System.Data.ConnectionState.Broken)
{
connection.Close();
connection.Open();
}
return connection;
}
}
//£¨Î޲Σ©·µ»ØÖ´ÐеÄÐÐÊý(ɾ³ýÐ޸ĸüÐÂ)
public static int ExecuteCommand(string safeSql)
{
MySqlCommand cmd = new MySqlCommand(safeSql, Connection);
int result = cmd.ExecuteNonQuery();
return result;
}
//£¨ÓвΣ©
public static int ExecuteCommand(string sql, params MySqlParameter[] values)
{
MySqlCommand cmd = new MySqlCommand(sql, Connection);
cmd.Parameters.AddRange(values);
return cmd.ExecuteNonQuery();
}
//£¨Î޲Σ©·µ»ØµÚÒ»ÐеÚÒ»ÁÐ(ɾ³ýÐ޸ĸüÐÂ)
public static int GetScalar(string safeSql)
{
MySqlCommand cmd = new MySqlCommand(safeSql, Con