/// <summary>
/// Executes when a device is removed from enumeration
/// </summary>
/// <param name="sender">The device watcher.</param>
/// <param name="deviceInfoUpdate">An update of the device.</param>
private async void DeviceWatcher_Removed(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate)
{
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
if (_readerWriterLockSlim.TryEnterWriteLock(TimeSpan.FromSeconds(1)))
{
var device = BluetoothLeDevices.FirstOrDefault(i => i.DeviceInfo.Id == deviceInfoUpdate.Id);
BluetoothLeDevices.Remove(device);
var unusedDevice = _unusedDevices.FirstOrDefault(i => i.Id == deviceInfoUpdate.Id);
_unusedDevices?.Remove(unusedDevice);
_readerWriterLockSlim.ExitWriteLock();
}
});
}
/// <summary>
/// Executes when a device is removed from enumeration
/// </summary>
/// <param name="sender">The device watcher.</param>
/// <param name="deviceInfoUpdate">An update of the device.</param>
private async void DeviceWatcher_Removed(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate)
{
// Protect against race condition if the task runs after the app stopped the deviceWatcher.
if (sender == _deviceWatcher)
{
await DispatcherQueue.ExecuteOnUIThreadAsync(
() =>
{
if (_readerWriterLockSlim.TryEnterWriteLock(TimeSpan.FromSeconds(1)))
{
var device = BluetoothLeDevices.FirstOrDefault(i => i.DeviceInfo.Id == deviceInfoUpdate.Id);
BluetoothLeDevices.Remove(device);
var unusedDevice = _unusedDevices.FirstOrDefault(i => i.Id == deviceInfoUpdate.Id);
_unusedDevices?.Remove(unusedDevice);
_readerWriterLockSlim.ExitWriteLock();
}
}, DispatcherQueuePriority.Normal);
}
}