在ASP.NET控件DataGrid里添加确认删除的对话框

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

在删除数据前进行确认是一个非常友好的做法。在本文里，我们就讨论利用TemplateColumn和Button服务端控件实现这种功能的方法。

查看例子

DeleteIt.aspx

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="DeleteIt.aspx.vb" Inherits="aspxWeb.DeleteIt"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
    <title>WebForm1</title>
    <meta content="Microsoft Visual Studio .NET 7.0" name="GENERATOR">
    <meta content="Visual Basic 7.0" name="CODE_LANGUAGE">
    <meta content="JavaScript" name="vs_defaultClientScript">
    <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body>
    <asp:label ></asp:BoundColumn>
        </Columns>
      </asp:DataGrid>
    </form>
</body>
</HTML>

后代码：DeleteIt.aspx.vb

Imports System.Web
Imports System.Collections
Imports System
Imports System.Data
Imports System.Data.OleDb
Imports System.Web.UI.WebControls
Public Class DeleteIt
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
Sub Page_Load(ByVal Sender As Object, ByVal e As EventArgs) Handles MyBase.Load
    myDataGrid.HeaderStyle.Font.Bold = True
    myDataGrid.HeaderStyle.HorizontalAlign = HorizontalAlign.Center
    myDataGrid.Columns(0).HeaderText = "操作"
    myDataGrid.Columns(1).HeaderText = "标题"
    myDataGrid.Columns(2).HeaderText = "发布日期"
    If Not IsPostBack Then
      Dim strCn As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("Test.mdb")
      Dim strSql As String
      strSql = "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
Sub DataGrid_ItemCreated(ByVal Sender As Object, ByVal e As DataGridItemEventArgs)_
Handles myDataGrid.ItemCreated
    Select Case e.Item.ItemType
      Case ListItemType.Item, ListItemType.AlternatingItem, ListItemType.EditItem
        Dim myDeleteButton As Button
        myDeleteButton = e.Item.FindControl("btnDelete")
        myDeleteButton.Text = "删除此行"
        myDeleteButton.Attributes.Add("onclick", "return confirm('您真的要删除第 "_
+ e.Item.ItemIndex.ToString + " 行吗？');")
    End Select
End Sub
Private Sub myDataGrid_ItemCommand(ByVal source As Object, _
ByVal e As System.Web.UI.WebControls.DataGridCommandEventArgs)_
Handles myDataGrid.ItemCommand
    Response.Write("您要删除的是：<font color=red>" + e.Item.Cells(1).Text + "</font>")
    e.Item.BackColor = System.Drawing.Color.Ivory
End Sub
End Class