为DataGrid添加确认删除的对话框（2）
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在DataGrid里添加确认删除的对话框，第二个办法就是利用ButtonColumn，这个办法与第一个方法不同的是：我们不能使用FindControl方法来引用Button控件，这是因为，我们不知道由ButtonColumn产生的每个Button控件的ID，我们这里可以使用TableCell来引用TableCell里的Button控件，一旦引用了Button控件，我们就可以用Attributes集合来添加Onclick事件。源代码如下：
DeleteIt2.aspx
<![CDATA[<%@ Page Language="vb" AutoEventWireup="false" Codebehind="DeleteIt2.aspx.vb" Inherits="aspxWeb.DeleteIt2"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML> <HEAD> <title>DeleteIt2</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="Form1" method="post" runat="server"> </asp:Label> <Columns> <ItemTemplate> ' /> </ItemTemplate> </asp:TemplateColumn> <ItemTemplate> ' /> </ItemTemplate> </asp:TemplateColumn> </Columns> </asp:DataGrid> </form> </body></HTML>]]>DeleteIt2.aspx.vb
<![CDATA[Imports SystemImports System.WebImports System.DataImports System.Data.OleDbImports System.Web.UI.WebControlsPublic Class DeleteIt2 Inherits System.Web.UI.Page Protected WithEvents Label1 As System.Web.UI.WebControls.Label Protected WithEvents myDataGrid As System.Web.UI.WebControls.DataGrid#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 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 '在此处放置初始化页的用户代码 myDataGrid.HeaderStyle.HorizontalAlign = HorizontalAlign.Center myDataGrid.HeaderStyle.Font.Bold = True myDataGrid.HeaderStyle.BackColor = System.Drawing.Color.Ivory myDataGrid.Columns(0).HeaderText = "操作" myDataGrid.Columns(1).HeaderText = "标题" myDataGrid.Columns(2).HeaderText = "创建日期" If Not IsPostBack Then Dim strCn As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" _ + Server.MapPath("Test.mdb") Dim strSql As String = "SELECT Top 15 objectGuid,Title,CreateDate"_ + " FROM Document Order By CreateDate Desc" Dim cn As New OleDbConnection(strCn) cn.Open() Dim cmd As New OleDbCommand(strSql, cn) myDataGrid.DataSource = cmd.ExecuteReader(CommandBehavior.CloseConnection) myDataGrid.DataBind() cmd.Dispose() cmd = Nothing cn.Close() cn.Dispose() cn = Nothing End If End Sub Public Sub DataGrid_ItemCreated(ByVal sender As Object, _ ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles myDataGrid.ItemCreated Select Case e.Item.ItemType Case ListItemType.Item, ListItemType.AlternatingItem, ListItemType.EditItem Dim myTableCell As TableCell myTableCell = e.Item.Cells(0) Dim myDeleteButton As LinkButton myDeleteButton = myTableCell.Controls(0) myDeleteButton.Attributes.Add("onclick", "return confirm('您真的要删除此行吗？');") myDeleteButton.Text = "删除此行" End Select End Sub Sub MyDataGrid_Delete(ByVal Sender As Object, ByVal E As DataGridCommandEventArgs) Label1.Text = "你要删除的是：<font color=red> " _+ myDataGrid.DataKeys(CInt(E.Item.ItemIndex)) + "</font>" E.Item.BackColor = System.Drawing.Color.Tomato End SubEnd Class]]>
