如何获取当前任务参考？

Question

如何引用我的代码在其中执行的任务？

ISomeInterface impl = new SomeImplementation();
Task.Factory.StartNew(() => impl.MethodFromSomeInterface(), new MyState());

...

void MethodFromSomeInterface()
{
    Task currentTask = Task.GetCurrentTask();    // No such method?
    MyState state = (MyState) currentTask.AsyncState();
}

因为我正在调用一些接口方法,所以我不能只将新创建的任务作为附加参数传递.

Answer 1

由于您无法更改界面或实现,因此您必须自己完成,例如,使用ThreadStaticAttribute:

static class SomeInterfaceTask
{
  [ThreadStatic]
  static Task Current { get; set; }
}

...

ISomeInterface impl = new SomeImplementation();
Task task = null;
task = Task.Factory.StartNew(() =>
{
  SomeInterfaceTask.Current = task;
  impl.MethodFromSomeInterface();
}, new MyState());

...

void MethodFromSomeInterface()
{
  Task currentTask = SomeInterfaceTask.Current;
  MyState state = (MyState) currentTask.AsyncState();
}