Flajaxian FileUploader is free and open source .NET web control designed for asynchronous file upload of multiple files at the same time, without a page post back and with a progress bar indicating the current upload progress. This control does not require full trust environment. The control can be extended with the addition of server side and client side functions. Flajaxian FileUploader uses Adobe Flash Player 9 or higher Flash Player for the file upload request.
Help File: http://flajaxian.com/flajaxian.com/FileUploader2.0Help.html