如何创建一个运行STA线程的任务（TPL）？(How to create a task (TPL) running a STA thread?)

如何创建一个运行STA线程的任务（TPL）？(How to create a task (TPL) running a STA thread?)

使用线程很简单

Thread thread = new Thread(MethodWhichRequiresSTA); thread.SetApartmentState(ApartmentState.STA);

如何在WPF应用程序中完成相同的任务？ 这是一些代码：

Task.Factory.StartNew ( () => {return "some Text";} ) .ContinueWith(r => AddControlsToGrid(r.Result));

我得到一个InvalidOperationException

调用线程必须是STA，因为许多UI组件需要这样做。

Using Thread is pretty straightforward

Thread thread = new Thread(MethodWhichRequiresSTA); thread.SetApartmentState(ApartmentState.STA);

How to accomplish the same using Tasks in a WPF application? Here is some code:

Task.Factory.StartNew ( () => {return "some Text";} ) .ContinueWith(r => AddControlsToGrid(r.Result));

I'm getting an InvalidOperationException with

The calling thread must be STA, because many UI components require this.

最满意答案

您可以使用TaskScheduler.FromCurrentSynchronizationContext方法获取当前同步上下文的TaskScheduler （当您运行WPF应用程序时，这是WPF调度程序）。

然后使用接受TaskScheduler的ContinueWith重载：

var scheduler = TaskScheduler.FromCurrentSynchronizationContext(); Task.Factory.StartNew(...) .ContinueWith(r => AddControlsToGrid(r.Result), scheduler);

You can use the TaskScheduler.FromCurrentSynchronizationContext Method to get a TaskScheduler for the current synchronization context (which is the WPF dispatcher when you're running a WPF application).

Then use the ContinueWith overload that accepts a TaskScheduler:

var scheduler = TaskScheduler.FromCurrentSynchronizationContext(); Task.Factory.StartNew(...) .ContinueWith(r => AddControlsToGrid(r.Result), scheduler);