为DataGrid添加自动编号功能

为DataGrid添加自动编号功能

作者：孟宪会 出自：【孟宪会之精彩世界】 发布日期：2003年6月1日 6点33分54秒

下面的代码实现在DataGrid中添加自动编号的功能，主要是在数据绑定时利用Item属性。

查看例子

DataGridWithLine.aspx

1@ Page Language="vb" AutoEventWireup="false" Codebehind="DataGridWithLine.aspx.vb" Inherits="aspxWeb.DataGridWithLine"

DataGridWithLine.aspx.vb

Imports System Imports System.Data Imports System.Data.OleDb Public Class DataGridWithLine Inherits System.Web.UI.Page Protected WithEvents DataGrid1 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。 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 DataGrid1.Columns(0).HeaderText = "序号" DataGrid1.Columns(1).HeaderText = "文章标题" DataGrid1.Columns(2).HeaderText = "创建日期" Dim cnString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("Test.mdb") Dim strSQL As String = "SELECT TOP 21 Title,CreateDate FROM Document ORDER By CreateDate DESC" Dim cn As New OleDbConnection(cnString) cn.Open() Dim cmd As New OleDbCommand(strSQL, cn) Dim db As OleDbDataReader db = cmd.ExecuteReader(CommandBehavior.CloseConnection) DataGrid1.DataSource = db DataGrid1.DataBind() cn.Close() cn = Nothing cmd = Nothing db.Close() db = Nothing End Sub Private Sub DataGrid1_ItemDataBound(ByVal sender As Object, _ ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles DataGrid1.ItemDataBound If e.Item.ItemIndex <> -1 Then e.Item.Cells(0).Text = e.Item.ItemIndex + 1 End If End Sub End Class