using System; using System.Threading; using System.Threading.Tasks; class Program { static async Task Main(string[] args) { var cts = new CancellationTokenSource(); var task = LongRunningOperationAsync(cts.Token); // 模拟用户取消操作 await Task.Delay(1000); cts.Cancel(); try { await task...
public static async Task CancelANonCancellableTaskAsync{Console.WriteLine(nameof(CancelANonCancellableTaskAsync)); using (var cancellationTokenSource = new CancellationTokenSource){// Listening to key press to cancelvar keyBoardTask = Task.Run( =>{Console.WriteLine("Press enter to cancel");Console.ReadK...
创建TaskCompletionSource时建议使用TaskCreationOptions.RunContinuationsAsynchronously属性 对于编写类库的人来说TaskCompletionSource<T>是一个具有非常重要的作用,默认情况下任务延续可能会在调用try/set(Result/Exception/Cancel)的线程上进行运行,这也就是说作为编写类库的人来说必须需要考虑上下文,这通常是非常危险,可能就会...
捕获异常并处理:在异步方法中使用try-catch语句捕获TaskCanceledException异常,并根据具体情况进行处理,例如记录日志、回滚操作等。 取消任务的源头:如果任务的取消是由于外部条件变化引起的,可以在任务启动前检查这些条件,并在需要取消任务时调用CancellationTokenSource的Cancel方法来取消任务。 使用CancellationToken来取消任务:...
source.Cancel();try{ t.Wait(); }catch(AggregateException ae) {foreach(vareinae.InnerExceptions) Console.WriteLine("{0}: {1}", e.GetType().Name, e.Message); } Console.Write("Task t Status: {0}", t.Status);if(t.Status ==TaskStatus.RanToCompletion) ...
The task framework allows cancelling a task. The cancel task request also accepts a reason. However, that reason is not a part of the TaskCancelledException. Incorporating the reason into the TaskCancelledException would improve the info...
System.Threading.Tasks.TaskCanceledException: The request was canceled due to the configured HttpClient.Timeout of 100 seconds elapsing. System.Threading.Tasks.TaskCanceledException The request was canceled due to the configured HttpClient.Timeout of 100 seconds elapsing. at System.Net.Http.HttpClient....
(completedIterations >= 10) source.Cancel(); return iterations; }, token)); Console.WriteLine("Waiting for the first 10 tasks to complete...\n"); try { Task.WaitAll(tasks.ToArray()); } catch (AggregateException) { Console.WriteLine("Status of tasks:\n"); Console.WriteLine("{0,10}...
(completedIterations >= 10) source.Cancel(); return iterations; }, token)); Console.WriteLine("Waiting for the first 10 tasks to complete...\n"); try { Task.WaitAll(tasks.ToArray()); } catch (AggregateException) { Console.WriteLine("Status of tasks:\n"); Console.WriteLine("{0,10}...
I don't think this is a very good API. It shouldn't throw a TaskCanceledException unless the caller supplies a CancelationToken and calls Cancel! It should be a WebException. 3. You code has four diffent Network layers where an error can occur ...