How Close Async Operation before

Question

Hello.

I'm developing a code that execute AsyncOperation: PairAsync

        private async  void Button_Click(object sender, RoutedEventArgs e)
        {
            // Device Picker
            var devicePicker = new DevicePicker();

            // Filter
            devicePicker.Filter.SupportedDeviceSelectors.Add(WiFiDirectDevice.GetDeviceSelector(WiFiDirectDeviceSelectorType.AssociationEndpoint));

            // Show
            var di = await devicePicker.PickSingleDeviceAsync(new Rect(new Point(0, 0), new Point(10, 10)));

            // Pair
            var result = di.Pairing.PairAsync();
        }

I want to Close the PairAsync operation after 20 seconds if it not completed. I don't know how to do this.

Answer 1

Hello,

Welcome to Microsoft Q&A,

I want to Close the PairAsync operation after 20 seconds if it not completed. I don't know how to do this.

You could call AsTask extension method then pass 20s CancellationToken for PairAsync AsyncOperation method like the following.

var source = new CancellationTokenSource(TimeSpan.FromSeconds(20));  
var res = await PairAsync().AsTask(source.Token);  

Thanks
Nico Zhu

Answer 2

But I have to dispose the CancellationTokenSource then ?