[VB.NET]动态生成的repeater,为什么无法显示？_repeater控件使用后什么也没有

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动态生成的repeater,为什么无法显示？
说明:
1)将Shared Sub Item_DataBinding(ByVal sender As Object, ByVal e As System.EventArgs) ... ... end sub 放在
Public Class MyTemplate... ...End class外面时，无法编译通过，提示是“语句在命名空间中无效”，所以放在了class定义之中。

2)代码中的repeater2是通过designed直接添加的，可以显示，说明可以正常查询到数据。

3)比较奇怪，在web form中手动添加一个repeater控件，id是repeater1，然后就可以了，可这笔算是动态创建啊？

Public Class MyTemplate
Implements System.Web.UI.ITemplate

Dim templateType As ListItemType

Sub New(ByVal type As ListItemType)
templateType = type
End Sub

Shared Sub Item_DataBinding(ByVal sender As Object, ByVal e As System.EventArgs)
Dim ph As PlaceHolder = CType(sender, PlaceHolder)
Dim ri As RepeaterItem = CType(ph.NamingContainer, RepeaterItem)
Dim item1Value As Double = _
Convert.ToDouble(DataBinder.Eval(ri.DataItem, "name "))
Dim item2Value As Double = _
Convert.ToDouble(DataBinder.Eval(ri.DataItem, "hobby "))
CType(ph.FindControl( "item1 "), Label).Text = item1Value.ToString()
CType(ph.FindControl( "item2 "), Label).Text = item2Value
End Sub

Public Sub InstantiateIn(ByVal container As System.Web.UI.Control) _
Implements System.Web.UI.ITemplate.InstantiateIn

Dim ph As New PlaceHolder()
Dim item1 As New Label()
Dim item2 As New Label()
item1.ID = "item1 "
item2.ID = "item2 "

Select Case (templateType)
Case ListItemType.Header
ph.Controls.Add(New LiteralControl( "









" & _ " " & _ " ")) Case ListItemType.Item ph.Controls.Add(New LiteralControl( " ")) AddHandler ph.DataBinding, New EventHandler(AddressOf Item_DataBinding) Case ListItemType.AlternatingItem ph.Controls.Add(New LiteralControl( " ")) AddHandler ph.DataBinding, New EventHandler(AddressOf Item_DataBinding) Case ListItemType.Footer ph.Controls.Add(New LiteralControl( " "))
End Select
container.Controls.Add(ph)
End Sub
End Class

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim DS As DataSet
Dim sqlstr As String
Dim MyConnection As SqlConnection
Dim MyCommand As SqlDataAdapter
Dim n As Integer = 1
MyConnection = New SqlConnection( "server=(local);database=Lib;UID=sa;Pwd=123 ")

DS = New DataSet()

Dim Repeater1 As New Repeater()

Repeater1.HeaderTemplate = New MyTemplate(ListItemType.Header)
Repeater1.ItemTemplate = New MyTemplate(ListItemType.Item)
Repeater1.AlternatingItemTemplate = New MyTemplate(ListItemType.AlternatingItem)
Repeater1.FooterTemplate = New MyTemplate(ListItemType.Footer)


MyCommand = New SqlDataAdapter( "select * from abc ", MyConnection)
MyCommand.Fill(DS, "abc ")
Repeater1.DataSource = DS.Tables( "abc ")
Repeater1.DataBind()

''Repeater2.DataSource = DS.Tables( "abc ")
''Repeater2.DataBind()

Button1.Text = "finished "


End Sub
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