I have a user control.
Inside that user control is an updatepanel with a datalist control.
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="attachments.ascx.cs" Inherits="tools.attachments" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="Ajax" %>
<asp:Label ID="lblAttachStatus" runat="server" CssClass="inputError"></asp:Label>
<Ajax:AsyncFileUpload ID="AjaxFileUpload1" runat="server" OnUploadedComplete="AjaxFileUpload1_OnUploadComplete" ContextKeys="DFC4DA37" Width="400px" /><asp:UpdatePanel ID="updateAttachments" runat="server" UpdateMode="Conditional"><ContentTemplate><asp:DataList ID="datalistAttachments" runat="server" OnItemCommand="datalistAttachments_ItemCommand" OnItemDataBound="datalistAttachments_ItemDataBound" RepeatDirection="Horizontal" Width="100%" GridLines="Horizontal" RepeatColumns="4" Visible="true">
</ContentTemplate>
</asp:UpdatePanel>
When I add this control to the aspx (dragging onto page) I notice that any controls inside the update panel disappear in the GUI. On the initial pageload, the HTML for everything thats in the update panel is not even in the source code.
If I execute the code
- Click button to select file
- AjaxFileUpload1_OnUploadComplete fires
- datalistAttachments.DataSource() has data
- datalistAttachments_ItemDataBound fires
- datalistAttachments.DataBind() appears to bind successfully when stepping through <%#Bind('xxxx')%> in the ASPX
- updateAttachments.Update() executes
However, the results are never displayed. Its almost like any controls in the update panel never existed
Its like everything executes behind the scenes with no errors, but the control is never visible, datalist.visible is never set to false and setting it to true before rendering the page does no good. Any ideas?