我怎么能执行一个非阻塞System.Beep（）？ [英] How can I execute a non-blocking System.Beep()?

问题描述

在C＃中，我可以执行Console.Beep（）。但是，如果你指定的说1000，或1秒的时间，也不会执行的code中的下一行，直到第二遍。

In C# I can perform a Console.Beep(). However, if you specify a duration of say 1000, or 1 second, it will not execute the next line of code until that second passes.

有没有什么办法可以在非阻塞的方式执行Console.Beep（），所以它会继续发出蜂鸣声，仍然继续执行其下的code，同时发出蜂鸣音？

Is there any way possible to execute Console.Beep() in a non-blocking fashion so it will continue to beep and still continue executing the code below it while beeping?

推荐答案

您可以在一个单独的线程中运行它。

You can run it in a separate thread.

new Thread(() => Console.Beep()).Start();

今天早上我醒来发现对这个答案的评论乱舞。所以，我以为我会附和一些其他的想法。

I woke this morning to find flurry of comments on this answer. So I thought I would chime in with some other ideas.

上面也可以实现其上运行的线程池的螺纹，通过使用以下

The above can also be achieved running the thread on the Thread Pool, by using the following.

Action beep = Console.Beep;
beep.BeginInvoke((a) => { beep.EndInvoke(a); }, null);

在上面的code最重要的是，如果你使用的BeginInvoke否则你会遇到内存泄漏调用EndInvoke会在你的委托。

The important thing in the above code is to call EndInvoke on your delegate if you use BeginInvoke otherwise you will experience memory leaks.

从MSDN：重要：总是调用EndInvoke来完成你的异步调用。 <一href="http://msdn.microsoft.com/en-us/library/2e08f6yc(VS.80).aspx">http://msdn.microsoft.com/en-us/library/2e08f6yc(VS.80).aspx

From MSDN:Important: Always call EndInvoke to complete your asynchronous call. http://msdn.microsoft.com/en-us/library/2e08f6yc(VS.80).aspx

另外，也可以使用专用的蜂鸣声线有蜂鸣声在后台运行时，在无需创建一个新的线程，每次或使用线程池的需求（见西蒙·查德威克的评论）。举一个简单的例子，你可以有以下几种。请注意，我通过1作为maxStackSize，这将确保最低（而不是1，最小值）堆栈空间致力于此线程，请参阅MSDN的更多细节这一点。

Alternatively, you can use the dedicated Beep thread to have beeps run in the background when on demand without creating a new thread everytime or using the thread pool (see Simon Chadwick's comment). As a simple example, you could have the following. Notice that I pass 1 as the maxStackSize, this will ensure that the minimum (not 1, minimum) stack space is committed for this thread, see MSDN for more detail on this.

  class BackgroundBeep
  {
    static Thread _beepThread;
    static AutoResetEvent _signalBeep;

    static BackgroundBeep()
    {
      _signalBeep = new AutoResetEvent(false);
      _beepThread = new Thread(() =>
          {
            for (; ; )
            {
              _signalBeep.WaitOne();
              Console.Beep();
            }
          }, 1);
      _beepThread.IsBackground = true;
      _beepThread.Start();      
    }

    public static void Beep()
    {
      _signalBeep.Set();
    }
  }

通过这一点，所有你需要做的，随时与出创建新线程运行的底色蜂鸣音进行下面的调用

With this, all you need to do to run a backround beep at anytime with out creating new threads is make the following call

BackgroundBeep.Beep();

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