Edit Question - KnowledgeHub

Title Body

I'm a little confused about how to use Tasks with conditional Continuations. If I have a task, and then I want to continue with a tasks that handle success and error, and then wait on those to complete. void FunctionThrows() {throw new Exception("faulted");} static void MyTest() { var taskThrows = Task.Factory.StartNew(() => FunctionThrows()); var onSuccess = taskThrows.ContinueWith( prev => Console.WriteLine("success"), TaskContinuationOptions.OnlyOnRanToCompleted); var onError = taskThrows.ContinueWith( prev => Console.WriteLine(prev.Exception), TaskContinuationOptions.OnlyOnFaulted); //so far, so good //this throws because onSuccess was cancelled before it was started Task.WaitAll(onSuccess, onError); } Is this the preferred way of doing task success/failure branching? Also, how am I supposed to join all these tasks, suppose I've created a long line of continuations, each having their own error handling. //for example var task1 = Task.Factory.StartNew(() => ...) var task1Error = task1.ContinueWith( //on faulted var task2 = task1.ContinueWith( //on success var task2Error = task2.ContinueWith( //on faulted var task3 = task2.ContinueWith( //on success //etc Calling WaitAll on these invariably throws, because some of the continuations will be cancelled due to the TaskContinuationOptions , and calling Wait on a cancelled task throws. How do I join these without getting the "A task was cancelled" exception"?

Tags (comma-separated) Cancel