コード例 #1
0
ファイル: MainPage.xaml.cs プロジェクト: sumitkm/BotRacer
        /// <summary>
        /// Invoked when this page is about to be displayed in a Frame.
        /// </summary>
        /// <param name="e">Event data that describes how this page was reached.
        /// This parameter is typically used to configure the page.</param>
        protected override async void OnNavigatedTo(NavigationEventArgs e)
        {

            // Request the right to have background tasks run in the future. This need only be done once
            // after the app is installed, but it is harmless to do it every time the app is launched.
            if (await BackgroundExecutiondManager.RequestAccessAsync() == BackgroundAccessStatus.Denied)
            {
                // TODO: What?
            }


            // Acquire the set of background tasks that we already have registered. Store them into a dictionary, keyed
            // by task name. (For each LE device, we will use a task name that is derived from its Bluetooth address).
            Dictionary<string, BackgroundTaskRegistration> taskRegistrations = new Dictionary<string, BackgroundTaskRegistration>();
            foreach (BackgroundTaskRegistration reg in BackgroundTaskRegistration.AllTasks.Values)
            {
                taskRegistrations[reg.Name] = reg;
            }

            // Get the list of paired Bluetooth LE devicdes, and add them to our 'devices' list. Associate each device with
            // its pre-existing registration if any, and remove that registration from our dictionary.
            Devices.Clear();

            foreach (DeviceInformation di in await DeviceInformation.FindAllAsync(BluetoothLEDevice.GetDeviceSelector()))
            {
                BluetoothLEDevice bleDevice = await BluetoothLEDevice.FromIdAsync(di.Id);
                Racer device = new Racer(bleDevice);
                if (taskRegistrations.ContainsKey(device.TaskName))
                {
                    device.TaskRegistration = taskRegistrations[device.TaskName];
                    taskRegistrations.Remove(device.TaskName);
                }
                Devices.Add(device);
            }

            // Unregister any remaining background tasks that remain in our dictionary. These are tasks that we registered
            // for Bluetooth LE devices that have since been unpaired.
            foreach (BackgroundTaskRegistration reg in taskRegistrations.Values)
            {
                reg.Unregister(false);
            }

        }
コード例 #2
0
 /// <summary>
 /// Invoked when this page is about to be displayed in a Frame.
 /// </summary>
 /// <param name="e">Event data that describes how this page was reached.
 /// This parameter is typically used to configure the page.</param>
 protected override void OnNavigatedTo(NavigationEventArgs e)
 {
     Device = (Racer)e.Parameter;
 }