Cancel a Task if it hasnt completed in 5 seconds

Question

I've an asynchronous method where I'm running a void-return type method in a Task and I want that method to be cancelled in X time (let's say 5 seconds) if it hasn't completed by then.

I found two similar threads: Cancel long running Task after 5 seconds when not finished Asynchronously wait for Task<T> to complete with timeout but I don't manage to get the cancellation to work using these.

This is what I've so far:

 using (var cts = new CancellationTokenSource(5000))
            {
                await Task.Run(() =>
                {
                    CandySystem.QueryCandies(rowOrderByIndex, columnOrderByIndex,
                        orderByDescending);
                }, cts.Token);
            }

I expect method "QueryCandies" to cancel after running for 5 seconds. Could someone provide me "for dummies" explanation what's going wrong here?

To somewhat oversimplify, the cancellation token is checked before the task is started, and if it is cancelled then the task won't even be started - otherwise, the code run by the task will need to check a cancellation token itself in order to cancel. (Normally you'd pass the same cancellation token to your task code and check it at some point or points.) The `Task` class itself will NOT attempt to cancel a task once its been started! — Matthew Watson, Oct 22 '19 at 14:36

Cancel a Task if it hasnt completed in 5 seconds

0 Answers0