Hi,
That is a new class of Uploader 3.0 , and we are prepairing the documents for it.
You can also check this method to get the temp path (which name is different from file.FileName)
string fullpath=file.GetTempFilePath();
(if you will not use none-file-system uploader provider.)
(AjaxUploader supports custom provider to store the temporary files, and we already have a database example)
Regards,
Terry