Metro 风格应用程序中的任务

Question

I have a question regarding Task in metro style applications (winrt).

Thread's are not available (at least since windows 8.1/windows phone 8.1), so to perform asynchronous operations we have to use Task now.

• When I create Task and call Run doest it create new Thread? If so is there a way to kill/stop that Thread?

• All Tasks are part of application procces - so when I call Application.Current.Exit() does it stops all Tasks (In case I have not properly stopped/closed/ended them ?) If not Is it possuble? In Thread you could set IsBackground property to force to close them whem application was closed.

• What happens to Tasks when the application is suspended? And what are guidelines ?

Thank you for your help.

Answer 1

When I create Task and call Run does it create new Thread? If so is there a way to kill/stop that Thread?

It doesn't create a new thread, it will use a thread from the thread pool. This is assuming you haven't passed any other TaskScheduler .

If so is there a way to kill/stop that Thread?

There is a way to do cooperative cancellation via the CancellationToken and CancellationTokenSource structures. There is no way to abort a Task such as with Thread.Abort . Task != Thread .

so when I call Application.Current.Exit() does it stops all Tasks

Threadpool threads are background by default, they won't prolong the life of your application like a foreground thread. You're safe to assume once the application has closed, all threads are terminated.