RadUpload has been replaced by RadAsyncUpload, Telerik’s next-generation ASP.NET upload component. If you are considering Telerik’s Upload control for new development, check out the documentation of RadAsyncUpload or the control’s product page. If you are already using RadUpload in your projects, you may be interested in reading how easy the transition to RadAsyncUpload is and how you can benefit from it in this blog post. The official support for RadUpload has been discontinued in June 2013 (Q2’13), although it is still be available in the suite. We deeply believe that RadAsyncUpload can better serve your upload needs and we kindly ask you to transition to it to make sure you take advantage of its support and the new features we constantly add to it.
When you submit the page the RadProgressArea control does not appear.
There are several possible reasons for the problem:
RadUploadHttpModule and/or RadUploadProgressHandler are not registered in web.config.
There is no RadProgressManager on the page.
The files are uploaded with an AJAX call.
There is a URL rewriter in the application.
There are other HTTP modules in the application that are designed to handle file uploads.
The application level trace is enabled in web.config.
The application is hosted in a web garden or web farm.
The uploading files have relatively small size (e.g. < 5MB) and are uploaded on localhost.
Before trying to diagnose this problem, make sure you are using the latest available version of the control.
The resolutions of each cause follow:
Add RadProgressManager to the page. You will need the RadUploadHttpModule and RadUploadProgressHandler registrations as well.
RadUpload and any other upload control which uses
<input type=file>html elements is unable to upload files with AJAX calls. For more information and workarounds, see Uploading Files with AJAX.
Configure your URL rewriter to exclude the path "/Telerik.RadUploadProgressHandler.ashx" from rewriting.
Remove all HTTP modules for file upload handling except RadUploadHttpModule. It is possible that the components that use the disabled modules will no longer be operational.
Disable the application level trace.
RadProgressArea cannot be used in web garden or web farm. The files will be uploaded successfully, but no progress will be displayed. If possible, disable the web garden.
There is no resolution, this behavior is expected as the files are uploaded very fast.