c#像目标c中一样调度队列 [英] c# dispatch queues like in objective c

问题描述

我想模仿c#中的Objective-C分派队列的行为.我看到有一个任务并行库，但是我真的不明白如何使用它，希望能对它有一些解释.

I want to mimic the behavior of objective-c dispatch queues in c#. I see that there is a task parallel library but I really don't understand how to use it and was hoping to get some explanation on how.

在目标c中，我将执行以下操作:

In objective c i would do something like:

-(void)doSomeLongRunningWorkAsync:(a_completion_handler_block)completion_handler
{
 dispatch_async(my_queue, ^{
   result *result_from_long_running_work = long_running_work();
   completion_handler(result_from long_running_work);
 });
}

-(void)aMethod
{
  [self doSomeLongRunningWorkAsync:^(result *) { // the completion handler
    do_something_with_result_from_long_running_async_method_above;
  }];

}

这如何转换为c#风格的任务并行库?

How is this translated into c# style task parallel library?

有没有比较网站?

推荐答案

如果只想在后台线程上执行一些长时间运行的CPU密集型代码，当完成后，请在UI线程上处理结果，将Task.Run()与await结合使用:

If all you want is to execute some long-running CPU-intensive code on a background thread, and when it's done, process the result on the UI thread, use Task.Run() in combination with await:

async Task AMethod()
{
    var result = await Task.Run(() => LongRunningWork());
    DoSomethingWithResult(result);
}

AMethod()现在是一个async Task方法，这意味着它的调用方也必须是一个async方法.

The AMethod() is now an async Task method, which means its caller also has to be an async method.

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