C# Task使用CancellationTokenSource取消任务

• 使用CancellationTokenSource取消任务

  CancellationTokenSource Source = new CancellationTokenSource();                  
              Task T = Task.Factory.StartNew(() =>
              {
               //如果Token被取消  
                  while (!Source.IsCancellationRequested)
                  {
                      Thread.Sleep(100);
                      Console.WriteLine("当前Thread正在运行{0}", Thread.CurrentThread.ManagedThreadId);
                  }
              }, Source.Token);
              Thread.Sleep(1000);
              Source.Cancel();     

  取消的回调方法

       CancellationTokenSource Source = new CancellationTokenSource();
               Source.Token.Register(() =>
               {
                   Console.WriteLine("当前的Source已经被取消");
               });
               Task T = Task.Factory.StartNew(() =>
               {
                   while (!Source.IsCancellationRequested)
                   {
                       Thread.Sleep(100);
                       Console.WriteLine("当前Thread正在运行{0}", Thread.CurrentThread.ManagedThreadId);
                   }
               }, Source.Token);
               Thread.Sleep(1000);
               Source.Cancel();

  延时取消

  CancellationTokenSource Source = new CancellationTokenSource();
               Source.Token.Register(() =>
               {
                   Console.WriteLine("当前的Source已经被取消");
               });
               Task T = Task.Factory.StartNew(() =>
               {
                   while (!Source.IsCancellationRequested)
                   {
                       Thread.Sleep(100);
                       Console.WriteLine("当前Thread正在运行{0}", Thread.CurrentThread.ManagedThreadId);
                   }
               }, Source.Token);           
               //延时取消
               Source.CancelAfter(new TimeSpan(0, 0, 0, 5));

  取消的组合

     //只要一个被取消，comineSource的组合就被取消，类似于WhenAny
                 CancellationTokenSource Source = new CancellationTokenSource();
                 Source.Cancel();
                 CancellationTokenSource Source2 = new CancellationTokenSource();
                 //comineSource 里面只要有一个被取消了，comineSource的状态就被取消
                 var comineSource = CancellationTokenSource.CreateLinkedTokenSource(Source.Token, Source2.Token);             
                 Console.WriteLine("s1={0},s2={1},s3={2}", Source.IsCancellationRequested, Source2.IsCancellationRequested, comineSource.IsCancellationRequested);

•