ASP.NET AJAX Progress Bar: Update from Code Behind?

I have an Import function for an Excel spreadsheet within an application. It uses the FileUpload control at the moment. I upload the file, then run an operation on that file. I want to inform the user of the operation being done, and the percentage that is done. I figure that I can take the total number of rows I extracted from the Excel spreadsheet, and continuously divide as I insert each record into the database and update a progress bar.

The problem is that I can't seem to find any solution that updates a progress bar from the Code Behind. I tried using Matt Berseth's solution:

http://mattberseth.com/blog/2008/06/aspnet_ajax_progressbar_contro.html

It's very nice to look at, but I can't see to get it working from the Code Behind. Theoretically, I figured that putting a value into a textbox on the page, and setting the onchange to a Javascript function to set the percentage would work as a test, but even that didn't give me the desired results.

Any suggestions as to how this can be done?

From stackoverflow

• thank you very much, what a helpful thread.

• hmmm, i have tried this solution:

  Real-Time Progress Bar With ASP.NET AJAX

  It worked fine!

  Maybe you should have a look at this ajax progress bar