%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>
 form id="form1" runat="server">
        nbsp;
        div style="text-align: center">
            table style="width: 302px; height: 246px;">
                tr>
                    td colspan="2" style="width: 496px">
                        asp:Label ID="Label2" runat="server" Text="更新指定数据" Font-Bold="True" ForeColor="Blue" Width="132px">/asp:Label>/td>
                /tr>
                tr>
                    td colspan="2" style="width: 496px">
        asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" Font-Size="Smaller" ForeColor="#333333" GridLines="None">
            Columns>
                asp:BoundField DataField="商品编号" HeaderText="商品编号" />
                asp:BoundField DataField="商品名称" HeaderText="商品名称" />
                asp:BoundField DataField="商品数量" HeaderText="商品数量" />
                asp:BoundField DataField="商品单价" HeaderText="商品单价" />
                asp:HyperLinkField DataNavigateUrlFields="商品编号" DataNavigateUrlFormatString="Default.aspx?商品编号={0}"
                    HeaderText="更新" Text="更新" />
            /Columns>
            FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
            EditRowStyle BackColor="#999999" />
            SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
            PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
            HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            AlternatingRowStyle BackColor="White" ForeColor="#284775" />
        /asp:GridView>
                    /td>
                /tr>
                tr>
                    td colspan="2" style="width: 496px" align="center">
                        nbsp;/td>
                /tr>
                tr>
                    td colspan="2" style="width: 496px">
                        asp:Label ID="Label3" runat="server" Font-Size="Smaller" Text="商品名称：" Width="65px">/asp:Label>asp:TextBox ID="TxtName" runat="server">/asp:TextBox>
                    /td>
                /tr>
                tr>
                    td colspan="2">
                        asp:Label ID="Label4" runat="server" Font-Size="Smaller" Text="商品数量：">/asp:Label>
        asp:TextBox ID="TxtNum" runat="server">/asp:TextBox>/td>
                /tr>
                tr>
                    td colspan="2">
                        asp:Label ID="Label5" runat="server" Font-Size="Smaller" Text="商品单价：">/asp:Label>
        asp:TextBox ID="TxtPrice" runat="server">/asp:TextBox>/td>
                /tr>
                tr>
                    td colspan="2" style="width: 496px">
                        nbsp;asp:Button ID="BtnUpdate" runat="server" OnClick="BtnUpdate_Click" Text="更新" Width="55px" />/td>
                /tr>
            /table>
        /div>
    /form>

View Code
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)//首次执行页面时
        {
            GridViewBind();//绑定自定义方法GridViewBind
            if (Request.QueryString["商品编号"] != null)//判断，如果可以获取到id的值，则执行以下操作
            {
                SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);
                con.Open();
                SqlDataAdapter ada = new SqlDataAdapter("select * from tb_shopping05 where 商品编号=" + Request.QueryString["商品编号"] + "", con);
                DataSet ds = new DataSet();
                ada.Fill(ds, "tb_shopping05");
                DataRowView drv = ds.Tables["tb_shopping05"].DefaultView[0];
                this.TxtName.Text = drv["商品名称"].ToString();
                this.TxtNum.Text = drv["商品数量"].ToString();
                this.TxtPrice.Text = drv["商品单价"].ToString();
            }
        }
    }
    public void GridViewBind()//绑定GridView控件的自定义方法
    {
        SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);
        con.Open();
        SqlDataAdapter ada = new SqlDataAdapter("select * from tb_shopping05", con);
        DataSet ds = new DataSet();
        ada.Fill(ds);
        GridView1.DataSource = ds;
        GridView1.DataBind();
        con.Close();
    }
    protected void BtnUpdate_Click(object sender, EventArgs e)
    {
        try
        {
            SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);
            con.Open();
            SqlCommand com = new SqlCommand("update tb_shopping05 set 商品名称='" + this.TxtName.Text + "',商品数量='" + this.TxtNum.Text + "',商品单价='" + this.TxtPrice.Text + "' where 商品编号=" + Request["商品编号"], con);
            com.ExecuteNonQuery();
            GridViewBind();
            Response.Write("script language=javascript>alert('恭喜您！信息更新成功！')/script>");
        }
        catch
        {
            Response.Write("script language=javascript>alert('很遗憾！信息更新失败！')/script>");
        }
    }
}