/// <summary>
/// Unregister from App events and DeviceWatcher events because this page will be unloaded.
/// </summary>
/// <param name="eventArgs"></param>
//protected override void OnNavigatedFrom(NavigationEventArgs eventArgs)
//{
// StopDeviceWatchers();
// StopHandlingAppEvents();
// // We no longer care about the device being connected
// EventHandlerForDevice.Current.OnDeviceConnected = null;
// EventHandlerForDevice.Current.OnDeviceClose = null;
//}
public async void ConnectToDevice_Click()
{
var selection = ConnectDevicesSelectedItems;
DeviceListEntry entry = null;
if (selection != null)
{
var obj = selection;
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 = this.OnDeviceConnected;
EventHandlerForDevice.Current.OnDeviceClose = this.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.
await Windows.UI.Core.CoreWindow.GetForCurrentThread().Dispatcher.RunAsync(
CoreDispatcherPriority.Normal,
async() =>
{
Boolean openSuccess = await EventHandlerForDevice.Current.OpenDeviceAsync(entry.DeviceInformation, entry.DeviceSelector);
UpdateConnectDisconnectButtonsAndList(!openSuccess);
});
// Disable connect button if we connected to the device
}
}
}
/// <summary>
/// Creates a DeviceListEntry for a device and adds it to the list of devices in the UI
/// </summary>
/// <param name="deviceInformation">DeviceInformation on the device to be added to the list</param>
/// <param name="deviceSelector">The AQS used to find this device</param>
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);
}
}
public void DisconnectFromDevice_Click()
{
var selection = ConnectDevicesSelectedItems;
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 != null)
{
var obj = selection;
entry = (DeviceListEntry)obj;
if (entry != null)
{
EventHandlerForDevice.Current.CloseDevice();
}
}
UpdateConnectDisconnectButtonsAndList(true);
}