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

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