我想实现Datagrid的多行编辑，但是点击CheckBox控件无反应，提交以后和原来的值一样。源代码如下，请各位高人指点错在哪里。
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="SelectNew.aspx.vb" Inherits="YQLJ.SelectNew"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>SelectNew</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
<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">
<FONT face="宋体">
<asp:DataGrid id="DataGrid1" runat="server" BorderColor="White" BorderStyle="Ridge" CellSpacing="1"
BorderWidth="2px" BackColor="White" CellPadding="3" GridLines="None" AutoGenerateColumns="False"
Width="848px">
<SelectedItemStyle Font-Bold="True" ForeColor="White" BackColor="#9471DE"></SelectedItemStyle>
<ItemStyle ForeColor="Black" BackColor="#DEDFDE"></ItemStyle>
<HeaderStyle Font-Bold="True" ForeColor="#E7E7FF" BackColor="#4A3C8C"></HeaderStyle>
<FooterStyle ForeColor="Black" BackColor="#C6C3C6"></FooterStyle>
<Columns>
<asp:BoundColumn DataField="ID" HeaderText="ID"></asp:BoundColumn> (说明:ID 为数据库中的主键)
<asp:BoundColumn DataField="HL" HeaderText="HL"></asp:BoundColumn> (说明:HL 为数据库中的描述列)
<asp:TemplateColumn HeaderText="Title">
<ItemTemplate>
<asp:CheckBox id=CheckBox1 runat="server" Checked='<%# DataBinder.eval(Container.DataItem,"Valigate") %>'> (说明:Valigate为数据库中的Boolen类型的列)
</asp:CheckBox>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
<PagerStyle HorizontalAlign="Right" ForeColor="Black" BackColor="#C6C3C6"></PagerStyle>
</asp:DataGrid>
<P>
</FONT>
<asp:Button id="Button1" runat="server" Text="生成数据"></asp:Button></P>
<P><FONT face="宋体"></FONT></P>
</form>
</body>
</HTML>
后台代码如下：
Imports System
Imports System.Data
Imports System.Data.OleDb
Public Class SelectNew
Inherits System.Web.UI.Page
#Region " Web 窗体设计器生成的代码 "
'该调用是 Web 窗体设计器所必需的。
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub
Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
Protected WithEvents Button1 As System.Web.UI.WebControls.Button
'注意: 以下占位符声明是 Web 窗体设计器所必需的。
'不要删除或移动它。
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
'不要使用代码编辑器修改它。
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
BindData()
End Sub
Sub BindData()
Dim connection As New OleDbConnection(ConnectionString)
Dim adapter As New OleDbDataAdapter("select * from YQLJTable", connection)
Dim dataset As New DataSet
adapter.Fill(dataset, "myTable")
DataGrid1.DataSource = dataset.Tables("myTable").DefaultView
DataGrid1.DataBind()
End Sub
Private ReadOnly Property ConnectionString() As String
Get
Return ConfigurationSettings.AppSettings("MM_CONNECTION_STRING_YQLJConnection")
End Get
End Property
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim value1 As String
Dim Item As DataGridItem '定义DataGrid对象，用于定义DataGrid的每一行.
Dim MyControl As CheckBox '把 MyControl 定义为 CheckBox 控件.
Dim connection As New OleDbConnection(ConnectionString)
Dim command As New OleDbCommand
connection.Open()
For Each Item In DataGrid1.Items
MyControl = Item.FindControl("CheckBox1") 'MyControl从每行的CheckBox控件中获取值.
If (Not MyControl Is Nothing) Then
If MyControl.Checked = True Then
value1 = MyControl.Checked.TrueString
Else
value1 = MyControl.Checked.FalseString
End If
Response.Write("value=" + value1 + "<br>") '我在这里写出出value1的值，查找问题的出处，发现Value1的值不会因为用户选取CheckBox1而改变,只是按照数据库提取出来的值显示。
Else
Response.Write("Control not exist ...")
End If
Dim id As String = Item.Cells(0).Text
command.Connection = connection
command.CommandText = "update YQLJTable set valigate =" + value1 + " where ID =" + id
command.ExecuteNonQuery()
Next Item
connection.Close()
BindData()
End Sub
End Class