Using a CancellationToken to cancel a task without explicitly checking within the task?

Question

Background:

I have a web application which kicks off long running (and stateless) tasks:

var          


        

Answer 1

If you actually just have a bunch of method calls you are calling one after the other, you can implement a method runner that runs them in sequence and checks in between for the cancellation.

Something like this:

public static void WorkUntilFinishedOrCancelled(CancellationToken token, params Action[] work)
{
    foreach (var workItem in work)
    {
        token.ThrowIfCancellationRequested();
        workItem();
    }
}

You could use it like this:

async Task DoWork(Foo foo)
{
    WorkUntilFinishedOrCancelled([YourCancellationToken], DoStuff1, DoStuff2, DoStuff3, ...);        
}

This would essentially do what you want.