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);