逐渐发布数据以查看asp.net mvc

I am generating lets say a 1000 of records to a database. That means it takes some time. Now, a user can become impatient. So I want to show him a progress bar during the generation process, which happens in Controller. I have found pretty cool progress bars in jquery or flash, but I have no idea, how to use them, since after sending a request to an action, the first data I get to create a new view page (I know of) are after the Controller action finishes.I am generating lets say a 1000 of records to a