/// <summary>
/// Executes when a device is removed from enumeration
/// </summary>
/// <param name="sender"></param>
/// <param name="deviceInfoUpdate"></param>
private async void DeviceWatcher_Removed(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate)
{
try
{
// Protect against race condition if the task runs after the app stopped the deviceWatcher.
if (sender == deviceWatcher)
{
ObservableBluetoothLEDevice dev;
try
{
// Need to lock as another DeviceWatcher might be modifying BluetoothLEDevices
await BluetoothLEDevicesLock.WaitAsync();
// Find the corresponding DeviceInformation in the collection and remove it.
dev = BluetoothLEDevices.FirstOrDefault(device => device.DeviceInfo.Id == deviceInfoUpdate.Id);
if (dev != null)
{ // Found it in our displayed devices
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(
Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
Debug.Assert(BluetoothLEDevices.Remove(dev), "DeviceWatcher_Removed: Failed to remove device from list");
});
}
else
{ // Did not find in diplayed list, let's check the unused list
DeviceInformation di = unusedDevices.FirstOrDefault(device => device.Id == deviceInfoUpdate.Id);
if (di != null)
{ // Found in unused devices, remove it
Debug.Assert(unusedDevices.Remove(di), "DeviceWatcher_Removed: Failed to remove device from unused");
}
}
}
finally
{
BluetoothLEDevicesLock.Release();
}
}
}
catch (Exception ex)
{
Debug.WriteLine("DeviceWatcher_Removed: " + ex.Message);
}
}
/// <summary>
/// Executes when a device is removed from enumeration
/// </summary>
/// <param name="sender"></param>
/// <param name="deviceInfoUpdate"></param>
private async void DeviceWatcher_Removed(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate)
{
try
{
// Protect against race condition if the task runs after the app stopped the deviceWatcher.
if (sender == deviceWatcher)
{
ObservableBluetoothLEDevice dev;
try
{
// Need to lock as another DeviceWatcher might be modifying BluetoothLEDevices
await BluetoothLEDevicesLock.WaitAsync();
// Find the corresponding DeviceInformation in the collection and remove it.
dev = BluetoothLEDevices.FirstOrDefault(device => device.DeviceInfo.Id == deviceInfoUpdate.Id);
if (dev != null)
{ // Found it in our displayed devices
OnDeviceEnumEvent(new BLTEEnumEventArgs()
{
Notify = BLTEEnumEvent.Remove, Device = dev
});
Debug.Assert(BluetoothLEDevices.Remove(dev), "DeviceWatcher_Removed: Failed to remove device from list");
}
else
{ // Did not find in diplayed list, let's check the unused list
DeviceInformation di = unusedDevices.FirstOrDefault(device => device.Id == deviceInfoUpdate.Id);
if (di != null)
{ // Found in unused devices, remove it
Debug.Assert(unusedDevices.Remove(di), "DeviceWatcher_Removed: Failed to remove device from unused");
}
}
}
finally
{
BluetoothLEDevicesLock.Release();
}
}
}
catch (Exception ex)
{
Debug.WriteLine("DeviceWatcher_Removed: " + ex.Message);
}
}
