How to implement real time updates in ASP.NET

I have seen several websites that show you a real time update of what’s going on in the database. An example could beA stock ticker website that shows stock prices in real time Showing data like...

ASP.Net AJAX timeout although request is completing long bef

I have an ASP.Net application that makes an AJAX request to retrieve at report. The report can run for a long time so I set the asyncpostbacktimeout in to 600. However, when I try to run the report, if...