等待两个线程完成

如果你有一个主线程启动另外两个线程.使主线程等待另外两个线程的最简洁方法是什么？

我可以使用bgndworker和sleep spinner来检查bgnd worker的IsBusy,但我认为有更好的方法.

编辑 更多要求:

主线程还有其他一些工作要做(例如GUI).

两个衍生线程应该能够报告异常并返回结果值

REA_ANDREW.. 10

使用Thread.Join()的快速示例;

        Thread t1 = new Thread(new ThreadStart(delegate()
        {
            System.Threading.Thread.Sleep(2000);
        }));

        Thread t2 = new Thread(new ThreadStart(delegate()
        {
            System.Threading.Thread.Sleep(4000);
        }));

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

        t1.Join();
        t2.Join();

使用等待句柄编辑另外3个示例:

            ManualResetEvent[] waitHandles = new ManualResetEvent[]{
            new ManualResetEvent(false),
            new ManualResetEvent(false)
        };

        Thread t1 = new Thread(new ParameterizedThreadStart(delegate(object state)
        {
            ManualResetEvent handle = (ManualResetEvent)state;
            System.Threading.Thread.Sleep(2000);
            handle.Set();
        }));

        Thread t2 = new Thread(new ParameterizedThreadStart(delegate(object state)
        {
            ManualResetEvent handle = (ManualResetEvent)state;
            System.Threading.Thread.Sleep(4000);
            handle.Set();
        }));

        t1.Start(waitHandles[0]);
        t2.Start(waitHandles[1]);

        WaitHandle.WaitAll(waitHandles);

        Console.WriteLine("Finished");

Marc Gravell.. 5

请参阅此主题的答案.我喜欢这个选项 ;-p

Forker p = new Forker();
p.Fork(delegate { DoSomeWork(); });
p.Fork(delegate { DoSomeOtherWork(); });
p.Join();

重新返回值/报告异常 - 只需让每个分支在逻辑结束时作为回调...(您可以使用捕获的变量将状态传递到两个分支,包括共享记录器等).

使用Thread.Join()的快速示例;

        Thread t1 = new Thread(new ThreadStart(delegate()
        {
            System.Threading.Thread.Sleep(2000);
        }));

        Thread t2 = new Thread(new ThreadStart(delegate()
        {
            System.Threading.Thread.Sleep(4000);
        }));

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

        t1.Join();
        t2.Join();

使用等待句柄编辑另外3个示例:

            ManualResetEvent[] waitHandles = new ManualResetEvent[]{
            new ManualResetEvent(false),
            new ManualResetEvent(false)
        };

        Thread t1 = new Thread(new ParameterizedThreadStart(delegate(object state)
        {
            ManualResetEvent handle = (ManualResetEvent)state;
            System.Threading.Thread.Sleep(2000);
            handle.Set();
        }));

        Thread t2 = new Thread(new ParameterizedThreadStart(delegate(object state)
        {
            ManualResetEvent handle = (ManualResetEvent)state;
            System.Threading.Thread.Sleep(4000);
            handle.Set();
        }));

        t1.Start(waitHandles[0]);
        t2.Start(waitHandles[1]);

        WaitHandle.WaitAll(waitHandles);

        Console.WriteLine("Finished");

请参阅此主题的答案.我喜欢这个选项 ;-p

Forker p = new Forker();
p.Fork(delegate { DoSomeWork(); });
p.Fork(delegate { DoSomeOtherWork(); });
p.Join();

重新返回值/报告异常 - 只需让每个分支在逻辑结束时作为回调...(您可以使用捕获的变量将状态传递到两个分支,包括共享记录器等).