RadControls for ASP.NET AJAX 1. RadUpload needs to be placed inside a form tag
2. The progress manager HTTP handler’s extension should be changed to "axd": Before:
CopyXML
<add path="Telerik.RadUploadProgressHandler.ashx" ... />
After:
CopyXML
<add path="Telerik.RadUploadProgressHandler.axd" ... />
3. Set the AjaxUrl property of RadProgressManager to "~/Telerik.RadUploadProgressHandler.axd":
CopyASPX
<telerik:RadProgressManager runat="server" ID="RadProgressManager1"
AjaxUrl="~/Telerik.RadUploadProgressHandler.axd" />
See Also