如何将嵌套线程与其父线程或调用线程同步 [英] how to synchronize nested thread with its parent or calling thread

问题描述

i我调用2个或更多线程取决于具体情况，所以如何同步这些线程。

i意思是说，当这两个线程完成时，控件应该返回到调用线程，否则它应该等待。



i我使用一个简单的窗口形式，它包含一个按钮，在这个按钮的click事件上，我启动一个线程，它调用另一个方法，并在该方法中我已经声明了超过2个线程（根据条件）。



第一个线程完成而第二个线程正在运行时出现问题，并且调用线程在参数中发送一个新值。

i希望调用线程应该等到所有这些线程都被刷新。



请给我任何建议。

i am calling 2 or more threads depends on the situation, so how to synchronize these threads.
i mean to say, that when both of these threads finishes then the control should return to the calling thread otherwise it should wait.

i am using a simple window form, it contains a a button, on the click event of this button, i start a thread, it calls another method and in that method i have declared more than 2 thread (based on the condition).

problem occurs when first thread finishes while the second is running , and the calling thread sends a new value in the parameter.
i want that the calling thread should wait until all these thread finshed.

any suggestion please.

推荐答案

不确定这个解决方案是否完美匹配，但现在确实如此。至少你应该知道同步。



密钥是类 AutoResetEvent 和 WaitHandle 。



创建一个包含线程方法的类。

Not sure if this solution is a perfect match, but here it is. At least you should get an idea about synchronization.

The keys are the classes AutoResetEvent and WaitHandle.

Create a class that contains the thread method.

public class WorkingClassHero
{
  public AutoResetEvent I_am_done;

  public WorkingClassHero()
  {
    I_am_done = new AutoResetEvent(false);
  }

  public void DoWork()
  {
    AddCodeToDoTheJob();
    I_am_done.Set();
  }
}

然后启动线程并等待它们完成。

Then start the threads and wait for the them to finish.

WorkingClassHero hero1 = new WorkingClassHero();
Thread t1 = new Thread(new ThreadStart(hero1.DoWork));
WorkingClassHero hero2 = new WorkingClassHero();
Thread t2 = new Thread(new ThreadStart(hero2.DoWork));

WaitHandle[] waitHandles = new WaitHandle[]
{
  hero1.I_am_done,
  hero2.I_am_done
};

t1.Start();
t2.Start();           

WaitHandle.WaitAll(waitHandles);

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