About Uploading Files
RadUpload has been replaced by RadAsyncUpload, Telerik’s next-generation ASP.NET upload component.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.
You can use the RadUpload and RadProgressManager components, separately or together, to enhance your application's ability to upload files. When using RadProgressManager, you can also use RadProgressArea to display a progress dialog for lengthy uploads.
Memory optimization now relies on the default .NET Framework 2.0+ engine. This means that the server memory is not overloaded when uploading large files.
RadProgressManager
RadProgressManager is required for enabling the progress monitoring of RadProgressArea.
In order to use RadProgressManager, you must configure your application using the Web.config file. There are two settings you should register:
RadUploadHttpModule - this HttpModule contains the core functionality of the progress manager.
RadUploadProgressHandler - this HttpHandler is used by RadProgressManager for asynchronous progress updates.
By default, you can upload files which size is up to 4MB. You can, however, configure your application for large uploads , to allow up to 2GB.
RadUpload
RadUpload offers several advantages over standard file input controls, including
Automatic file saving - RadUpload can automatically save your uploaded files to a selected folder with just a single property setting.
File saving with server-side code - in complex situations, you can still manipulate uploaded files using server-side code while gaining the benefits of integrated file validation.
Integrated validation - RadUpload can automatically validate file extensions, mime-types, and the size of uploaded files.
In addition to the integrated validation, RadUpload offers options for validation using server-side code or ASP.NET validators.
Adding Custom Fields - RadUpload lets you add custom fields to each file input.
Customizing Appearance - you can customize the appearance of RadUpload to allow multiple file input areas with integrated controls that let the user manipulate them.
Limitations
RadUpload has a few known limitations, which you should know about. Here are the known limitations of RadProgressArea.