ASP.NET学习笔记2--自己写代码绑定Gridview

CREATE TABLE [SHANGPING_INFO]
(
 [Shangping_Id] INT PRIMARY KEY IDENTITY,
 [Shangping_Name] CHAR(50) NOT NULL,
 [Shangping_Content] CHAR(50) NOT NULL,
 [Add_Time] DATETIME
)
INSERT INTO [VIP_USER] VALUES(‘tangxuelong‘,‘Password@1‘)
INSERT INTO [SHANGPING_INFO] VALUES(‘Airconditioner‘,‘空调‘,2014-5-20)

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 DAL;
namespace MyStore
{
    public partial class Main : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            DBhelper db=new DBhelper();   //实例化
            SqlConnection conn = db.Getcoon();  //创建连接对象
            if (conn.State == ConnectionState.Open) //判断数据库是否打开
            {
                conn.Close();
            }
            conn.Open();                   //打开数据库
            string sql = "select * from [Shangping_Info]";  //查询语句
            SqlDataAdapter da = new SqlDataAdapter(sql,conn); //使用dataadapter查询数据
            DataSet ds = new DataSet();         //创建dataset对象
            da.Fill(ds);                          //将dataAdapter读取的数据填充到dataset中
            GridView_shangping.DataSource = ds;    //把Gridview的数据源绑定到 dataset
            GridView_shangping.DataBind();
            conn.Close();
            da.Dispose();
            
        }
    }
}