多线程简单示例

转自原文多线程简单示例

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Runtime.Remoting.Messaging;

namespace ThreadMulti
{
    class Program
    {
        delegate string MyDelegate(string msg);
        static object locker=new object();

        static void Main(string[] args)
        {
            System.Console.WriteLine("---------------------");
            WriteLine("Main Thread example.", ConsoleColor.Green);
            WriteLine("Async Thread example.", ConsoleColor.Red);
            WriteLine("Async Thread CallBack", ConsoleColor.Cyan);
            System.Console.WriteLine("---------------------
");

            WriteLine("Main Thread Begin ,ThreadId is : " + Thread.CurrentThread.ManagedThreadId, ConsoleColor.Green);
            MyDelegate myDelegate = new MyDelegate(Messgae);
            //异步调用，传入参数为object类型，此处用stirng示例
            myDelegate.BeginInvoke("Hello Thread World!", Completed, "传参示例");
            //模拟线程工作，可以看到两线程同时工作
            for (int i = 0; i < 5; i++)
            {
                Thread.Sleep(1000);
                WriteLine("Main Thread Works!", ConsoleColor.Green);
            }
            WriteLine("Main Thread Complete!", ConsoleColor.Green);
            Console.ReadKey();
        }

        static string Messgae(string msg)
        {
            WriteLine("Async Thread Begin ,ThreadId is : " + Thread.CurrentThread.ManagedThreadId, ConsoleColor.Red);
            //模拟线程工作，可以看到两线程同时工作
            for (int i = 0; i < 5; i++)
            {
                Thread.Sleep(500);
                WriteLine("Async Thread Works!", ConsoleColor.Red);
            }
            WriteLine("Async Thread Complete!", ConsoleColor.Red);
            return msg;
        }

        static void Completed(IAsyncResult iresult)
        {
            //通过 Thread.CurrentThread.ManagedThreadId 可以看出，回调函数运行在异步线程上
            WriteLine("Async Thread CallBack Begin,ThreadId is : " + Thread.CurrentThread.ManagedThreadId, ConsoleColor.Cyan);
            AsyncResult result = iresult as AsyncResult;
            //使用AsyncDelegate获得委托
            MyDelegate myDelegate = result.AsyncDelegate as MyDelegate;
            //使用EndInvoke获取返回值
            string data = myDelegate.EndInvoke(result);
            //用 AsyncState 获得传入的参数（即19行“传参示例”四个字）
            string asyncState = result.AsyncState.ToString();
            WriteLine("返回的数据:"+data, ConsoleColor.Cyan);
            WriteLine("异步调用结果状态:" + asyncState, ConsoleColor.Cyan);
            //模拟回调函数工作
            for (int i = 0; i < 3; i++)
            {
                Thread.Sleep(500);
                WriteLine("Async Thread CallBack Works!", ConsoleColor.Cyan);
            }
            WriteLine("Async Thread CallBack Complete!", ConsoleColor.Cyan);
        }


        static void WriteLine(string data, ConsoleColor color)
        {
            lock (locker)
            {
                Console.ForegroundColor = color;
                Console.WriteLine(data);
                Console.ResetColor(); 
            }
        }
    }
}

结果：