User2001833234 posted
Could someone help: I have a project where I'm using the 'FileUpload' Control in an update panel. In order to make the control work correctly I needed to add a 'PostBackTrigger' for the button that is used to process the file from the FileUpload
control. That all works fine other than the program processes a lot of data and needs a progress bar to show the user that its still working. I have tried using the Ajax 'UpdateProgress' control but it will not work when the button (causing the
Async post) has a PostBackTrigger associated with it.
Note: if you take off the Trigger, the UpdateProgress works just fine but the FileUpload fails.
I have run into this issue before with the FileUpload control. Any suggestions would really be appreaciated.
Here is a simple example
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:FileUpload ID="FileUpload" runat="server" />
<asp:Button ID="Button1" runat="server" Text="Button"/>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="Button1" />
</Triggers>
</asp:UpdatePanel>
<asp:UpdateProgress ID="updProgress" runat="server">
<ProgressTemplate>
<div id="load" class="asyncPostBackPanel">
<img src="Images/indicator.gif" alt="Loading..." />
Loading...
</div>
</ProgressTemplate>
</asp:UpdateProgress>
</div>
</form>
