Task任务使用记录

C# 4.0才有，4.0以下的不用试。

 

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
 
using System.Threading.Tasks;  
using System.Threading;  
 
namespace TaskDemo  
{  
    class Program  
    {  
        static void Main(string[] args)  
        {  
            try 
            {  
                int mCount = 0;  
 
                CancellationTokenSource tokenSource = new CancellationTokenSource();  
                CancellationToken token = tokenSource.Token;  
 
                Task t = new Task(() =>  
                {  
                    Thread.Sleep(1000);  
                    Console.WriteLine("任务开始工作……");  
                    //模拟工作过程     
                    for (int i = 0; i < 3000; i++)  
                    {  
                        if (token.IsCancellationRequested == true)  
                        {  
                            break;          //这里别人是用一个throw new OperationCanceledException(token); 但是我用就会报错  
                        }  
                        mCount++;  
                        Thread.Sleep(1);   
                    }  
                }, token);  
                token.Register(() =>  
               {      
 
                   Console.WriteLine("Canceled");  
 
               });  
                t.Start();  
                Console.WriteLine("这条语句先运行完毕了……");  
                t.ContinueWith((task) =>  
                {  
                    Console.WriteLine("任务完成，完成时候的状态为：");  
                    Console.WriteLine("IsCanceled={0}\tIsCompleted={1}\tIsFaulted={2}\tmCount={3}", task.IsCanceled, task.IsCompleted, task.IsFaulted, mCount);  
                });  
                Console.WriteLine("现在就按任意键的话，程序就退出了……");  
                Console.ReadKey();      //由于两个sleep都有点时间，如果在这时间之前按下任意键，结果是程序提前终止了  
                tokenSource.Cancel();  
                Console.ReadKey();      //程序退出  
 
            }  
            catch (Exception Ex)  
            {  
                Console.WriteLine(Ex.Message);  
            }  
 
        }  
    }  
}