为DataGrid添加自动编号功能
http://lucky_elove.www1.dotnetplayground.com/
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
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&lt;%@ Page Language="vb" AutoEventWireup="false" Codebehind="DataGridWithLine.aspx.vb" Inherits="aspxWeb.DataGridWithLine"%&gt;&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"&gt;&lt;HTML&gt; &lt;HEAD&gt; &lt;title&gt;DataGridWithLine&lt;/title&gt; &lt;meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.0"&gt; &lt;meta name="CODE_LANGUAGE" content="Visual Basic 7.0"&gt; &lt;meta name="vs_defaultClientScript" content="JavaScript"&gt; &lt;meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"&gt; &lt;/HEAD&gt; &lt;body MS_POSITIONING="GridLayout"&gt; &lt;form id="Form1" method="post" runat="server"&gt; &lt;asp:DataGrid id="DataGrid1" runat="server" AutoGenerateColumns="False"&gt; &lt;HeaderStyle Font-Bold="True" Wrap="False" HorizontalAlign="Center"&gt;&lt;/HeaderStyle&gt; &lt;Columns&gt; &lt;asp:TemplateColumn&gt;&lt;/asp:TemplateColumn&gt; &lt;asp:BoundColumn DataField="Title"&gt;&lt;/asp:BoundColumn&gt; &lt;asp:BoundColumn DataField="CreateDate" DataFormatString="{0:yyyy-M-d h:m:s}"&gt;&lt;/asp:BoundColumn&gt; &lt;/Columns&gt; &lt;/asp:DataGrid&gt; &lt;/form&gt; &lt;/body&gt;&lt;/HTML&gt;
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DataGridWithLine.aspx.vb
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Imports SystemImports System.DataImports System.Data.OleDbPublic 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。 &lt;System.Diagnostics.DebuggerStepThrough()&gt; 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 &lt;&gt; -1 Then e.Item.Cells(0).Text = e.Item.ItemIndex + 1 End If End SubEnd Class
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