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C#多线程的等待所有线程结束的一个问题

原作者: [db:作者] 来自: [db:来源] 收藏 邀请
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using System;
using System.Threading;
 
namespace ConsoleApplication1
{
    class Program
    {
        private static AutoResetEvent[] events;
 
        static void Main(string[] args)
        {
            int threadNum = 10;
            Thread[] thread = new Thread[threadNum];
 
            events = new AutoResetEvent[threadNum];
 
            for (int i = 0; i < threadNum; i++)
            {
                var waithandler = new AutoResetEvent(false);
                events[i] = waithandler;
                ThreadStart starter = delegate
                {
                    var param = new Tuple<string, AutoResetEvent>("test print:" + i, waithandler);
                    Print(param);
                };
                thread[i] = new Thread(starter)
                {
                    Name = "thread" + i.ToString()
                };
            }
 
            for (int i = 0; i < threadNum; i++)
            {
                thread[i].Start();
            }
 
            WaitHandle.WaitAll(events);
            Console.WriteLine("Completed!");
            Console.Read();
 
        }
 
        private static void Print(object param)
        {
            var p = (Tuple<string, AutoResetEvent>)param;
            Console.WriteLine(Thread.CurrentThread.Name + ": Begin!");
            Console.WriteLine(Thread.CurrentThread.Name + ": Print" + p.Item1);
            Thread.Sleep(300);
            Console.WriteLine(Thread.CurrentThread.Name + ": End!");
            p.Item2.Set();
        }
    }
}

一次性地Set,其实使用ManualResetEvent就足够了。

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using System;
using System.Collections.Generic;
using System.Threading;
 
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var waits = new List<EventWaitHandle>();
            for (int i = 0; i < 10; i++)
            {
                var handler = new ManualResetEvent(false);
                waits.Add(handler);
                new Thread(new ParameterizedThreadStart(Print))
                {
                    Name = "thread" + i.ToString()
                }.Start(new Tuple<string, EventWaitHandle>("test print:" + i, handler));
            }
            WaitHandle.WaitAll(waits.ToArray());
            Console.WriteLine("Completed!");
            Console.Read();
 
        }
 
        private static void Print(object param)
        {
            var p = (Tuple<string, EventWaitHandle>)param;
            Console.WriteLine(Thread.CurrentThread.Name + ": Begin!");
            Console.WriteLine(Thread.CurrentThread.Name + ": Print" + p.Item1);
            Thread.Sleep(300);
            Console.WriteLine(Thread.CurrentThread.Name + ": End!");
            p.Item2.Set();
        }
 
    }
}







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