请问一个有关DataList的问题

netdragon · 发表于 2004-2-27 03:51:00

<%@ Page Language="VB" ContentType="text/html" ResponseEncoding="gb2312" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ Import Namespace = "System.Data"  %>
<html>
<head>
   <script language="VB" runat="server">
   ' 创建数据源
   Function CreateDataSource() As ICollection
      Dim myDataTable As New DataTable()
      Dim myDataRow As DataRow
      myDataTable.Columns.Add(New DataColumn("EmployeeName", GetType(String)))
      Dim i As Integer
      For i = 0 To 9
         myDataRow = myDataTable.NewRow()
         myDataRow(0) = "somename" + i.ToString()
         myDataTable.Rows.Add(myDataRow)
      Next i
      Dim myDataView As New DataView(myDataTable)
      Return myDataView
   End Function

   Sub Page_Load(sender As Object, e As EventArgs)
      If Not IsPostBack Then
         '绑定数据到数据源
         myDataList.DataSource = CreateDataSource()
         myDataList.DataBind()
      End If
      ' Attach EventHandler for SelectedIndexChanged event.
      AddHandler myDataList.SelectedIndexChanged, AddressOf selectedItemChanged
   End Sub

   ' Handler function for 'SelectedIndexChanged' event.
   Sub selectedItemChanged(sender As Object, e As EventArgs)
      Dim myCurrentItem As DataListItem = myDataList.SelectedItem
      Dim myNamingContainer As Control = myCurrentItem.Controls(0).NamingContainer
      ' Display the NamingContainer.
      myLabel1.Text = "The NamingContainer is : " + myNamingContainer.UniqueID
      ' Display the UniqueID.
      myLabel2.Text = "The UniqueID is : " + CType(myCurrentItem.Controls(0), Control).UniqueID
   End Sub
</script>
</head>
<body>
   <form runat="server" ID="Form1">
      <asp

abel ID="myLabel1" Runat="server"></asp

abel><br>
<asp

abel ID="myLabel2" Runat="server"></asp:Label><br>
<asp

ataList id="myDataList" runat="server" BorderColor="black">
         <HeaderStyle BackColor="#aaaadd"></HeaderStyle>
         <SelectedItemStyle BackColor="lightgreen"></SelectedItemStyle>
         <HeaderTemplate>
            EmployeeName
         </HeaderTemplate>
         <ItemTemplate>
            <asp:LinkButton id="button1" Text='<%# DataBinder.Eval(Container.DataItem, "EmployeeName") %>' CommandName="select" runat="server" />
                
         </ItemTemplate>
      </asp

ataList>
</form>
</body>
</html>
以上是源代码：请问代码Dim myNamingContainer As Control = myCurrentItem.Controls(0).NamingContainer中的0表示什么？还有代码CType(myCurrentItem.Controls(0), Control).UniqueID中的0表示什么？我改成1时myLabel2后面会显示LinkButton的id。请告诉我这两个数字的意思。跟DataList中的哪个子控件件有关？

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