I know this question has been asked many times, but my problem is a little different.
I have page which lets user download and upload excel file. During downloading excel, it takes approx 2 mins to generate the file. I have added checkpoints which updates the database with status like (started processing, working on header …etc). I have done the same thing for upload.
I also have a ajax request which checks the database in fixed interval and prints status to user to give feedbacks like (started processing, working on header …etc).
The problem is, i get the feedback only when the process is complete. It looks like the session is blocked during the background process and any other request(ajax) are only completed once the background process is over. ajax makes approx 10 requests within 4 sec intervals.I get the 10 response back only in the end.
I have tried two iframes and also frames, one running the ajax and other running the process, Doesn’t work. i tried separate browser(Process running in IE, ajax running in FF) and that works (so i now my code works). Can anybody advise? Thanks
p.s. My environment is IIS 6, ASP.NET 3.5 with MVC 1.0 browser is IE6.0
This is exactly what i was looking for
(asynchronous-processing-in-asp-net-mvc-with-ajax-progress-bar)
Using delegate BeginInvoke of IAsyncResult helped with the blocked session