sqlserver帮助类的使用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using Common;
namespace WebApplication5
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

SqlParameter[] paras = new SqlParameter[] {
new SqlParameter("@id",1)
};
DataSet dt = SQLHelper.ExcuteDataSet("select * from [orderinfo] where id=@id", paras);
}
}
}

web.config配置