user control无法显示，求助！

[maya_aliaswavefront]

一个很简单的user control，运行是无法显示，不知道是什么问题。麻烦请帮忙看一下~谢谢了！

DataList中添加了两个hyperlink
<asp:DataList id="list" runat="server" ForeColor="Black">
<SelectedItemTemplate>
<asp:HyperLink id="HyperLink2" runat="server" CssClass="CategorySelected"></asp:HyperLink>
</SelectedItemTemplate>
<ItemTemplate>
<asp:HyperLink id="HyperLink1" runat="server" CssClass="CategoryUnselected"></asp:HyperLink>
</ItemTemplate>
</asp:DataList>

相关的vb代码：
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim listIndex As String = Request.Params("CategoryIndex")

If Not listIndex Is Nothing Then
list.SelectedIndex = CInt(listIndex)
End If

Dim catalog As New Catalog

list.DataSource = catalog.GetCategories()
list.DataBind()
End Sub

GetCategories()的代码：
Public Function GetCategories() As SqlDataReader
Dim connection As New SqlConnection(connectionString)
Dim command As New SqlCommand("GetCategories", connection)
command.CommandType = CommandType.StoredProcedure

connection.Open()
Return command.ExecuteReader(CommandBehavior.CloseConnection)
End Function

数据库的代码：
ALTER PROCEDURE GetCategories AS
SELECT CategoryID, CategoryName
FROM Categories

RETURN

[flyingbirddhp]

代码看不出问题
你应该把你调用的代码贴出来才有用啊

[Seeko0]

//使用DataBind

<asp:DataList id="list" runat="server" ForeColor="Black">
<SelectedItemTemplate>
<asp:HyperLink id="HyperLink2" runat="server" CssClass="CategorySelected" Text='<%# DataBinder.Eval(Container.DataItem, "CategoryID")%>'
"></asp:HyperLink>
</SelectedItemTemplate>
<ItemTemplate>
<asp:HyperLink id="HyperLink1" runat="server" CssClass="CategoryUnselected" Text='<%# DataBinder.Eval(Container.DataItem, "CategoryName")%>'></asp:HyperLink>
</ItemTemplate>
</asp:DataList>

//同时建议，不要使用SqlDataReader 为DataGrid的数据源，因为在打开数据源后没有关闭数据连接。建议采用DataSet为数据源，请参考msdn帮助文档

[maya_aliaswavefront]

谢谢~:)