Long running process using TPL. Could not find how to write callback?

Question

I have used TPL to do long running process like generating 1,00,000 PDF in my asp.net application. Codes is like bellow:

private Task<ErrorList> GeneratePDF()
{
    return Task.Factory.StartNew(

        --pdf generation goes here....
    )
}

Can anybody please help me to do following action:

I want to intimate UI how many PDF has been generated till now.
Once process is completed i want to show one popup page with all details of PDF generation. I could not find a way to write callback....

score 0 · Answer 1 · answered Mar 17 '12 at 17:52

I think you are best off using an architecture that polls your web page/service for the progress and status.
How To: Submit and Poll for Long-Running Tasks is one starting point.

For TPL related callback/progress reporting, see: Reporting Progress from Async Tasks

1 Answers1