private async void ConnectToDeviceClick(object sender, RoutedEventArgs eventArgs) { var selection = connectDevices.SelectedItems; DeviceListEntry entry = null; if (selection.Count > 0) { var obj = selection[0]; entry = (DeviceListEntry)obj; if (entry != null) { // Create an EventHandlerForDevice to watch for the device we are connecting to EventHandlerForDevice.CreateNewEventHandlerForDevice(); // Get notified when the device was successfully connected to or about to be closed EventHandlerForDevice.Current.OnDeviceConnected = OnDeviceConnected; EventHandlerForDevice.Current.OnDeviceClose = OnDeviceClosing; // It is important that the FromIdAsync call is made on the UI thread because the consent prompt, when present, // can only be displayed on the UI thread. Since this method is invoked by the UI, we are already in the UI thread. bool openSuccess = await EventHandlerForDevice.Current.OpenDeviceAsync(entry.DeviceInformation, entry.DeviceSelector); // Disable connect button if we connected to the device UpdateConnectDisconnectButtonsAndList(!openSuccess); if (openSuccess) { stackpanel1.Visibility = Visibility.Collapsed; initialize(); stackpanel2.Visibility = Visibility.Visible; } } } }
/// <summary> /// Creates a DeviceListEntry for a device and adds it to the list of devices in the UI /// </summary> private void AddDeviceToList(DeviceInformation deviceInformation, string deviceSelector) { // search the device list for a device with a matching interface ID var match = FindDevice(deviceInformation.Id); // Add the device if it's new if (match == null) { // Create a new element for this device interface, and queue up the query of its device information match = new DeviceListEntry(deviceInformation, deviceSelector); // Add the new element to the end of the list of devices listOfDevices.Add(match); } }
private void DisconnectFromDeviceClick(object sender, RoutedEventArgs eventArgs) { var selection = connectDevices.SelectedItems; DeviceListEntry entry = null; // Prevent auto reconnect because we are voluntarily closing it // Re-enable the ConnectDevice list and ConnectToDevice button if the connected/opened device was removed. EventHandlerForDevice.Current.IsEnabledAutoReconnect = false; if (selection.Count > 0) { var obj = selection[0]; entry = (DeviceListEntry)obj; if (entry != null) { EventHandlerForDevice.Current.CloseDevice(); } } UpdateConnectDisconnectButtonsAndList(true); }