异步/等待、线程池和 SetApartmentState

Question

I'd like to use await Task.Run(DoWork) , to do some repetitive single-threaded computational work on ThreadPool. The problem is, I need to use STA COM objects inside DoWork , so I guess I cannot use ThreadPool because I cannot alter the apartment state of a pool thread.

How can I still use async / await in this scenario? Creating my own pool of STA threads with a custom task scheduler sounds like an excessive work.

Answer 1

Stephen Toub has already written an StaTaskScheduler ^{( archive )} ; I recommend you use that.

You can then construct a TaskFactory using that TaskScheduler . There is no equivalent to Task.Run on the TaskFactory type but you can easily create one using StartNew and Unwrap .