Datagrid根据选择的checkbox编辑和更新多行记录····

前台：

<%@ Page language="c#" Codebehind="WebForm4.aspx.cs" AutoEventWireup="false" Inherits="WebApplication25.WebForm4" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
    <HEAD>
        <title>WebForm4</title>
        <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
        <meta name="CODE_LANGUAGE" Content="C#">
        <meta name="vs_defaultClientScript" content="JavaScript">
        <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
    </HEAD>
    <body>
        <form id="Form1" method="post" runat="server">
            <asp:DataGrid id="DataGrid1" runat="server" AutoGenerateColumns="False" DataKeyField="EmployeeID">
                <Columns>
                    <asp:TemplateColumn>
                        <ItemTemplate>
                            <input type="hidden" id="SelectedID" runat="server" value='<%# Container.ItemIndex%>' name="SelectedID"/>
                            <asp:CheckBox ID="chkExport" Runat="server" />
                        </ItemTemplate>
                    </asp:TemplateColumn>
                    <asp:BoundColumn DataField="EmployeeID" HeaderText="EmployeeID"></asp:BoundColumn>
                    <asp:TemplateColumn HeaderText="FirstName">
                        <ItemTemplate>
                            <asp:Label ID="lab_FirstName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"FirstName")%>'>
                            </asp:Label>
                            <asp:TextBox ID="txt_FirstName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"FirstName")%>' Visible="False">
                            </asp:TextBox>
                        </ItemTemplate>
                    </asp:TemplateColumn>
                    <asp:TemplateColumn HeaderText="LastName">
                        <ItemTemplate>
                            <asp:Label ID="lab_LastName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"LastName")%>'>
                            </asp:Label>
                            <asp:TextBox ID="txt_LastName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"LastName")%>' Visible="False">
                            </asp:TextBox>
                        </ItemTemplate>
                    </asp:TemplateColumn>
                </Columns>
            </asp:DataGrid>
            <asp:Button id="Button1" runat="server" Text="编辑"></asp:Button>
            <asp:Button id="Button2" runat="server" Text="更新"></asp:Button>
        </form>
    </body>
</HTML>

后台：

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace WebApplication25
{
    /// <summary>
    /// WebForm4 的摘要说明。
    /// </summary>
    public class WebForm4 : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.Button Button1;
        protected System.Web.UI.WebControls.Button Button2;
        protected System.Web.UI.WebControls.DataGrid DataGrid1;
        protected System.Web.UI.HtmlControls.HtmlInputHidden SelectID;

        private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
            if(!IsPostBack)
            {
                SetBind();
            }
        }

        private void SetBind()
        {
            SqlConnection conn=new SqlConnection("server=.;uid=sa;pwd=;database=northwind");
            SqlDataAdapter da=new SqlDataAdapter("select * from Employees",conn);
            DataSet ds=new DataSet();
            da.Fill(ds,"table1");
            this.DataGrid1.DataSource=ds.Tables["table1"];
            this.DataGrid1.DataBind();
        }

        #region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }

        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.Button1.Click += new System.EventHandler(this.Button1_Click);
            this.Button2.Click += new System.EventHandler(this.Button2_Click);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion

        private void Button1_Click(object sender, System.EventArgs e)
        {
            foreach(DataGridItem di in this.DataGrid1.Items)
            {
                if(((CheckBox)di.FindControl("chkExport")).Checked==true)
                {
                    ((TextBox)di.FindControl("txt_FirstName")).Visible=true;
                    ((TextBox)di.FindControl("txt_LastName")).Visible=true;
                    ((Label)di.FindControl("lab_FirstName")).Visible=false;
                    ((Label)di.FindControl("lab_LastName")).Visible=false;
                }
            }

        }

        private void Button2_Click(object sender, System.EventArgs e)
        {
            foreach(DataGridItem di in this.DataGrid1.Items)
            {
                if(((CheckBox)di.FindControl("chkExport")).Checked==true)
                {
                    if(((TextBox)di.FindControl("txt_FirstName")).Text!=((Label)di.FindControl("lab_FirstName")).Text||((TextBox)di.FindControl("txt_LastName")).Text!=((Label)di.FindControl("lab_LastName")).Text)
                    {
                        Response.Write("记录号:"+this.DataGrid1.DataKeys[int.Parse(((HtmlInputHidden)di.FindControl("SelectedID")).Value)]+",FirstName:"+((TextBox)di.FindControl("txt_FirstName")).Text+",LastName:"+((TextBox)di.FindControl("txt_LastName")).Text+"<br>");
                    }
                    ((TextBox)di.FindControl("txt_FirstName")).Visible=false;
                    ((TextBox)di.FindControl("txt_LastName")).Visible=false;
                    ((Label)di.FindControl("lab_FirstName")).Visible=true;
                    ((Label)di.FindControl("lab_LastName")).Visible=true;
                    ((CheckBox)di.FindControl("chkExport")).Checked=false;
                }
            }
        }
    }
}