This is the code I use for my UpdatePanel.
The FileUploadAsync.HasFile() is always null.
I am wondering what is wrong with my asp.net page ...
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="Server" />
<asp:UpdatePanel ID="UpdatePanelAddFiles"runat="server" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="LkUpload" />
</Triggers>
<ContentTemplate>
<asp:LinkButton ID="LkUpload" runat="server" OnClick="LkUpload_Click" Visible="false">Upload</asp:LinkButton>
<ajaxToolkit:AsyncFileUpload runat="server" ID="FileUploadAsync" />
</ContentTemplate>
</asp:UpdatePanel>
Sumit Kesarwani
03-Sep-2014codebehind: