asp.net2.0实现主从数据表的简单方法

实现效果：在主表里选中某行，从表里得出该行的详情。

方法1：代码实现。
在页面上放一个GridView，一个DetailView。数据绑定GridView并且要设置主键，然后在SelectedIndexChanged事件写代码：选择发生变化时，DetailView也改变为相应的Detail。
具体代码：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class MasterDetail2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            string SQL = "SELECT * FROM [Orders]";
            GridView1.DataSource = Binding(SQL);
            GridView1.DataKeyNames = new string[] { "OrderID" };
            GridView1.DataBind();
        }
     }

    protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {
        string OrderID = Convert.ToString(GridView1.SelectedValue);
        string SQL =  "SELECT * FROM [OrderDetails] WHERE [OrderID]='" + OrderID + "'";
        DetailsView1.DataSource = Binding(SQL);
        DetailsView1.DataBind();
    }