为DataGrid添加CheckBox控件

为DataGrid添加CheckBox控件

CheckBoxDataGrid.aspx

程序代码

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="CheckBoxDataGrid.aspx.vb"
Inherits="aspxWeb.CheckBoxDataGrid" %>


为DataGrid添加CheckBox控件的例子

'
runat="server"Width="80%" ID="lblColumn"/>

后代码 CheckBoxDataGrid.aspx.vb

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.
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