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为DataGrid添加CheckBox控件，并实现“全选”功能。
VB.NET 版本
CheckBoxDataGrid.aspx
<![CDATA[
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="CheckBoxDataGrid.aspx.vb"
Inherits="aspxWeb.CheckBoxDataGrid" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>为DataGrid添加CheckBox控件的例子</title>
<meta name="GENERATOR" content="Microsoft Visual Studio.NET 7.0">
<meta name="CODE_LANGUAGE" content="Visual Basic 7.0">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="frmMain" method="post" runat="server">
<asp:DataGrid id="dgMain" runat="server" Width="98%" AutoGenerateColumns="False">
<SelectedItemStyle Font-Size="9pt" Font-Names="宋体"></SelectedItemStyle>
<EditItemStyle Font-Size="9pt" Font-Names="宋体" Font-Bold="True" ForeColor="Red" BackColor="Info"/>
<AlternatingItemStyle Font-Size="9pt" Font-Names="宋体" ForeColor="ControlText" BackColor="White"/>
<ItemStyle Font-Size="9pt" Font-Names="宋体" ForeColor="ControlText" BackColor="WhiteSmoke"/>
<HeaderStyle Font-Bold="True" HorizontalAlign="Center" ForeColor="Black"
VerticalAlign="Middle" BackColor="Control">
</HeaderStyle>
<Columns>
<asp:TemplateColumn HeaderText="操作">
<HeaderStyle HorizontalAlign="Center" Width="50px"></HeaderStyle>
<ItemTemplate>
<asp:CheckBox ID="chkExport" Runat="server" />
</ItemTemplate>
<EditItemTemplate>
<asp:CheckBox ID="chkExportON" Runat="server" Enabled="true" />
</EditItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="id" ReadOnly="True" HeaderText="序号">
<HeaderStyle Width="50px"></HeaderStyle>
</asp:BoundColumn>
<asp:TemplateColumn SortExpression="demo" HeaderText="标题">
<ItemTemplate>
<asp:Label Text='<%# Server.HTMLEncode(DataBinder.Eval(Container.DataItem, "Title"))%>'
runat="server" Width="80%" ID="lblColumn"/>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>
<asp:Button id="cmdSelectAll" runat="server" Text="全部选中"></asp:Button>
<asp:Button id="cmdFindSelected" runat="server" Text="查看选中的项目"></asp:Button>
<br>
<asp:Label id="Label1" runat="server"></asp:Label>
</form>
</body>
</HTML>
]]>
后代码 CheckBoxDataGrid.aspx.vb
<![CDATA[
Imports System.Data
Imports System.Data.OleDb
Public Class CheckBoxDataGrid
Inherits System.Web.UI.Page
Protected WithEvents cmdSelectAll As System.Web.UI.WebControls.Button
Protected WithEvents dgMain As System.Web.UI.WebControls.DataGrid
Protected WithEvents cmdFindSelected As System.Web.UI.WebControls.Button
Dim oDataView As DataView
Protected WithEvents Label1 As System.Web.UI.WebControls.Label
Dim sConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="_
+ Server.MapPath("Test.mdb")
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs)_
Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)_
Handles MyBase.Load
'Put user code to initialize the page here
dgMain.Columns(0).HeaderText = "选项"
dgMain.Columns(1).HeaderText = "序号"
dgMain.Columns(2).HeaderText = "标题"
cmdFindSelected.Text = "查看选中的项目"
RefreshGrid()
If Not Page.IsPostBack Then
cmdSelectAll.Text = "全部选中"
dgMain.DataBind()
End If
End Sub
#Region "处理多选"
Private Sub cmdSelectAll_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)_
Handles cmdSelectAll.Click
selectAll()
End Sub
Private Sub selectAll()
Dim oDataGridItem As DataGridItem
Dim chkExport As System.Web.UI.WebControls.CheckBox
If cmdSelectAll.Text = "全部选中" Then
For Each oDataGridItem In dgMain.Items
chkExport = oDataGridItem.FindControl("chkExport")
chkExport.Checked = True
Next
cmdSelectAll.Text = "全部不选"
Else
For Each oDataGridItem In dgMain.Items
chkExport = oDataGridItem.FindControl("chkExport")
chkExport.Checked = False
Next
cmdSelectAll.Text = "全部选中"
End If
End Sub
#End Region
#Region "更新DataGrid"
Private Sub RefreshGrid()
Dim oConnection As OleDbConnection
Dim oCommand As OleDbDataAdapter
Dim oDataSet As New DataSet()
Try
Dim sSQL As String = "Select top 5 * from TestTable order by id"
oConnection = New OleDbConnection(sConnectionString)
oCommand = New OleDbDataAdapter(sSQL.ToString, oConnection)
oCommand.Fill(oDataSet, "TestTable")
oDataView = New DataView(oDataSet.Tables("TestTable"))
dgMain.DataSource = oDataView
oConnection.Close()
Catch ex As Exception
'// Place Error Handling here
End Try
End Sub
#End Region
Private Sub cmdFindSelected_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)_
Handles cmdFindSelected.Click
Dim oDataGridItem As DataGridItem
Dim chkExport As System.Web.UI.WebControls.CheckBox
Dim oExArgs As New System.Collections.ArrayList()
Dim sID As String
Label1.Text = ""
For Each oDataGridItem In dgMain.Items
chkExport = oDataGridItem.FindControl("chkExport")
If chkExport.Checked Then
Label1.Text = ""
sID = CType(oDataGridItem.FindControl("lblColumn"), Label).Text
oExArgs.Add(sID)
Dim i As Integer = 0
For i = 0 To oExArgs.Count - 1
Label1.Text += oExArgs(i) + ","
Next
End If
Next
End Sub
End Class
]]>
C# 版本
CheckBoxDataGrid.aspx
<![CDATA[
<%@ Page language="c#" enableViewState = "true" Codebehind="DataGridCheckBox.aspx.cs"
AutoEventWireup="false" Inherits="eMeng.Exam.DataGridCheckBox.DataGridCheckBox" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>为DataGrid添加CheckBox控件的例子</title>
</HEAD>
<body>
<form id="frmMain" method="post" runat="server">
<asp:DataGrid id="dgMain" runat="server" Width="98%" AutoGenerateColumns="False" Font-Size="9pt" Font-Names="宋体">
<AlternatingItemStyle ForeColor="ControlText" BackColor="White" />
<ItemStyle ForeColor="ControlText" BackColor="WhiteSmoke" />
<HeaderStyle Font-Bold="True" HorizontalAlign="Center" ForeColor="Black" VerticalAlign="Middle"
BackColor="Control"></HeaderStyle>
<Columns>
<asp:TemplateColumn HeaderText="操作">
<HeaderStyle HorizontalAlign="Center" Width="50px"></HeaderStyle>
<ItemTemplate>
<input type="hidden" id="SelectedID" runat="server"
value='<%# DataBinder.Eval(Container.DataItem, "id")%>'/>
<asp:CheckBox ID="chkExport" Runat="server" />
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="id" ReadOnly="True" HeaderText="序号">
<HeaderStyle Width="50px"></HeaderStyle>
</asp:BoundColumn>
<asp:TemplateColumn SortExpression="demo" HeaderText="标题">
<ItemTemplate>
<asp:Label Text='<%# Server.HtmlEncode((string)DataBinder.Eval(Container.DataItem, "Title"))%>'
runat="server" Width="80%" ID="lblColumn" />
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>
<asp:Button id="cmdSelectAll" runat="server" Text="全部选中"></asp:Button>
<asp:Button id="cmdFindSelected" runat="server" Text="查看选中的项目"></asp:Button>
<br>
<asp:Label id="Label1" runat="server"></asp:Label>
<hr>
<asp:Label id="Label2" runat="server"></asp:Label>
</form>
</body>
</HTML>
]]>
DataGridCheckBox.aspx.cs
<![CDATA[
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
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 eMeng.Exam.DataGridCheckBox
{
/// <summary>
/// DataGridCheckBox 的摘要说明。
/// 【孟宪会之精彩世界】
/// </summary>
public class DataGridCheckBox : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button cmdSelectAll;
protected System.Web.UI.WebControls.Button cmdFindSelected;
protected System.Web.UI.WebControls.DataGrid dgMain;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Label Label2;
DataView oDataView;
string sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
+ HttpContext.Current.Server.MapPath("../../aspxWeb.mdb.ascx");
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
dgMain.Columns[0].HeaderText = "选项";
dgMain.Columns[1].HeaderText = "序号";
dgMain.Columns[2].HeaderText = "标题";
cmdFindSelected.Text = "查看选中的项目";
RefreshGrid();
if( !this.IsPostBack)
{
cmdSelectAll.Text = "全部选中";
dgMain.DataBind();
}
}
#region Web Form Designer generated code
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.cmdSelectAll.Click += new System.EventHandler(this.cmdSelectAll_Click);
this.cmdFindSelected.Click += new System.EventHandler(this.cmdFindSelected_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void cmdSelectAll_Click(object sender, System.EventArgs e)
{
selectAll();
}
private void selectAll()
{
System.Web.UI.WebControls.CheckBox chkExport ;
if( cmdSelectAll.Text == "全部选中")
{
foreach(DataGridItem oDataGridItem in dgMain.Items)
{
chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
chkExport.Checked = true;
}
cmdSelectAll.Text = "全部不选";
}
else
{
foreach(DataGridItem oDataGridItem in dgMain.Items)
{
chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
chkExport.Checked = false;
}
cmdSelectAll.Text = "全部选中";
}
}
private void RefreshGrid()
{
OleDbConnection oConnection;
OleDbDataAdapter oCommand ;
DataSet oDataSet = new DataSet();
try
{
string sSQL = "Select top 10 * from Document order by CreateDate DESC";
oConnection = new OleDbConnection(sConnectionString);
oCommand = new OleDbDataAdapter(sSQL.ToString(), oConnection);
oCommand.Fill(oDataSet, "Document");
oDataView = new DataView(oDataSet.Tables["Document"]);
dgMain.DataSource = oDataView;
oConnection.Close();
}
catch(Exception ex)
{
Label1.Text = ex.Message.ToString();
}
}
private void cmdFindSelected_Click(object sender, System.EventArgs e)
{
System.Web.UI.WebControls.CheckBox chkExport;
System.Collections.ArrayList oExArgs = new System.Collections.ArrayList();
string sID;
Label1.Text = "";
Label2.Text = "";
foreach(DataGridItem oDataGridItem in dgMain.Items)
{
chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
if( chkExport.Checked)
{
//如果要进行删除，可以在这里构造sql语句进行删除
string sql = "DELETE FROM Document WHERE id ="
+ ((HtmlInputHidden)oDataGridItem.FindControl("SelectedID")).Value;
Label2.Text += "<li>" + sql;
sID = ((HtmlInputHidden)oDataGridItem.FindControl("SelectedID")).Value;
oExArgs.Add(sID);
int i = 0;
Label1.Text = "";
for( i = 0;i<oExArgs.Count;i++)
{
Label1.Text += oExArgs[i] + "<br>";
}
}
}
Label2.Text += "<br><font color=red>执行SQL语句即可删除，这里省略。</font>";
}
}
}
]]>
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