.NET Information center: Task-based Asynchronous Pattern

Wednesday, February 06, 2013

Task-based Asynchronous Pattern - WaitAsync

Recently I was asked about a specific scenario when some code was being converted into using TAP and this was code that already used tasks. Since the existing code used the "IsFaulted" property a lot I came up with this little extension method making it easy to see if a task failed or not using the await keyword but without adding a lot of exception handling.

1: public static Task<bool> WaitAsync(this Task task)

2: {

3: var tcs = new TaskCompletionSource<bool>();

4: task.ContinueWith(

5: t => tcs.TrySetResult(!(t.IsFaulted || t.IsCanceled)));

6: return tcs.Task;

7: }

public static Task<bool> WaitAsync(this Task task)

{

return task.ContinueWith(

t => !(t.IsFaulted || t.IsCanceled),

TaskContinuationOptions.ExecuteSynchronously);

}