I then use that data to make a MemoryStream that I can create a RadUploadSelectedFile from, and add it to the CurrentSession:
RadUploadSelectedFile f =
After each file is added I call PrepareSelectedFilesForUpload so that the user can see the file added and know that progress is being made on the set of files they dropped.
I've tried making a RadUploadSelectedFile from a zero-length MemoryStream, which gave me an UploadItem (yay!). However, adding it to the "TooLargeFiles" collection didn't seem to do anything -- it didn't show an error message to the user, and it uploaded a zero-length file to my server.
Is there a way to do what I want? I'm willing to handle any function I need to to get this to happen.
Thanks for your help!