private async void DeviceWatcher_Removed(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate)
{
// We must update the collection on the UI thread because the collection is databound to a UI element.
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
lock (this)
{
Debug.WriteLine(String.Format("Removed {0}{1}", deviceInfoUpdate.Id, ""));
// Protect against race condition if the task runs after the app stopped the deviceWatcher.
if (sender == deviceWatcher)
{
// Find the corresponding DeviceInformation in the collection and remove it.
BluetoothLEDeviceDisplay bleDeviceDisplay = FindBluetoothLEDeviceDisplay(deviceInfoUpdate.Id);
if (bleDeviceDisplay != null)
{
KnownDevices.Remove(bleDeviceDisplay);
}
DeviceInformation deviceInfo = FindUnknownDevices(deviceInfoUpdate.Id);
if (deviceInfo != null)
{
UnknownDevices.Remove(deviceInfo);
}
}
}
});
}
private async void DeviceWatcher_Updated(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate)
{
// We must update the collection on the UI thread because the collection is databound to a UI element.
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
lock (this)
{
Debug.WriteLine(String.Format("Updated {0}{1}", deviceInfoUpdate.Id, ""));
// Protect against race condition if the task runs after the app stopped the deviceWatcher.
if (sender == deviceWatcher)
{
BluetoothLEDeviceDisplay bleDeviceDisplay = FindBluetoothLEDeviceDisplay(deviceInfoUpdate.Id);
if (bleDeviceDisplay != null)
{
// Device is already being displayed - update UX.
bleDeviceDisplay.Update(deviceInfoUpdate);
return;
}
DeviceInformation deviceInfo = FindUnknownDevices(deviceInfoUpdate.Id);
if (deviceInfo != null)
{
deviceInfo.Update(deviceInfoUpdate);
// If device has been updated with a friendly name it's no longer unknown.
if (deviceInfo.Name != String.Empty)
{
KnownDevices.Add(new BluetoothLEDeviceDisplay(deviceInfo));
UnknownDevices.Remove(deviceInfo);
}
}
}
}
});
}