C# 多线程处理相关说明: WaitHandle,waitCallback, ThreadPool.QueueUserWorkItem

  class TestThread

    {

        

        static void Main()

        {

            //使用WaitHandle静态方法阻止一个线程，直到一个或多个同步对象接收到信号

            WaitHandle[] waitHandles = new WaitHandle[] 

            {

            new ManualResetEvent(false),

            new ManualResetEvent(false)

            };



            WaitCallback waitCallback = new WaitCallback(MyThreadWork);



            WaitCallback waitCallback2 = new WaitCallback(MyThreadWork2);     // 增加线程工作类型



            ThreadPool.QueueUserWorkItem(waitCallback, "第一个线程");

            ThreadPool.QueueUserWorkItem(waitCallback, "第二个线程");



            MyState myState = new MyState("第三个线程", 100, waitHandles[0]); // 增加自定义的线程参数类型



            ThreadPool.QueueUserWorkItem(waitCallback2, myState);

            ThreadPool.QueueUserWorkItem(waitCallback2, new MyState("第四个线程", 2, waitHandles[1]));



            WaitHandle.WaitAll(waitHandles);



            Console.WriteLine("MyState 的 Number 值为: {0}", myState.Number);    // 读取线程改变后的 MyState

        }



        public static void MyThreadWork(object state)

        {

            Console.WriteLine("MyThreadWork 开始启动 …… {0}", (string)state);

            Thread.Sleep(1000);

            Console.WriteLine("运行结束…… {0}", (string)state);

        }



        // use MyState class 

        public static void MyThreadWork2(object state)

        {

            MyState myState = ((MyState)state);

            Console.WriteLine("MyThreadWork2 开始启动…… {0},{1}", ((MyState)state).Info, ((MyState)state).Number);

            Thread.Sleep(1000);

            ((MyState)state).Number += 1;      // 将 state的 Number 加 1

            Console.WriteLine("运行结束…… {0},{1}", ((MyState)state).Info, ((MyState)state).Number);

            ((ManualResetEvent)myState.DoneEvent).Set();

        }



    }



    public class MyState

    {

        private string info;

        private int number;

        private WaitHandle _doneEvent;





        public MyState(string info, int number, WaitHandle doneEvent)

        {

            this.info = info;

            this.number = number;

            this._doneEvent = doneEvent;

        }



        public string Info

        {

            get

            {

                return this.info;

            }

            set

            {

                this.info = value;

            }

        }



        public WaitHandle DoneEvent

        {

            get

            {

                return this._doneEvent;

            }

        }



        public int Number

        {

            get

            {

                return this.number;

            }

            set

            {

                this.number = value;

            }

        }

    }