问题描述
原谅我,如果这是一个简单的问题;我不能句话在一个通用的足够的方法来搜索答案
考虑以下代码:
VAR任务= Task.Factory.StartNew(()=>无论());
task.ContinueWith(回调,TaskScheduler.FromCurrentSynchronizationContext())
究竟它是如何确定的当回调方法将执行?
它会等待,直到主线程当前做完不管它是干什么的,还是会被调用后立即异步调用完成?并将此回调主线程返回到不管它在做之前,之前完全执行呢?
When the asynchronous call completes, the continuation will be scheduled. The effect of that scheduling depends on the scheduler (of course) but for a "normal" WPF or Windows Forms message loop, I'd expect it to be scheduled in a similar way to a call to Control.BeginInvoke
or Dispatcher.BeginInvoke
- in other words, when the "main" thread has finished the rest of the tasks which had been scheduled before this one.
I wouldn't expect the main thread to magically stop what it's doing and execute the continuation. It could make the continuation a high-priority task in its queue, however.
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