C# (CSharp) System.Threading.Tasks System.Threading.Tasks.TaskCompletionSource.TrySetCanceled示例

示例#1

        private static void TransferCompletionToTask <T>(System.Threading.Tasks.TaskCompletionSource <T> tcs, System.ComponentModel.AsyncCompletedEventArgs e, Func <T> getResult, Action unregisterHandler)
        {
            if (e.UserState != tcs)
            {
                return;
            }

            try
            {
                unregisterHandler();
            }
            finally
            {
                if (e.Cancelled)
                {
                    tcs.TrySetCanceled();
                }
                else if (e.Error != null)
                {
                    tcs.TrySetException(e.Error);
                }
                else
                {
                    tcs.TrySetResult(getResult());
                }
            }
        }