larg file upload with progress bar in asp.net

i am working with large video upload . for this i use splits the video into blocks(10 MB) and upload it using offset value. more over i have to show the progress

but i couldn't show the progress while the upload in progress. once the upload is over ,then status message appears.what is solution for this?

To my knowledge, you can't do this directly with the file upload controls in ASP.NET, specifically because the information is in the same thread. This is due to the HTTP POST of your file being in the same thread handling the update of the progress bar. You'll need to split the operations in some fashion, either using AJAX, Flash, or something similar.