async void RegisterTask(DeviceWatcherTrigger deviceWatcherTrigger)
{
System.Diagnostics.Debug.WriteLine("[RegisterTask] Register the background task.");
//
// Check for existing registrations of this background task.
//
BackgroundExecutionManager.RemoveAccess();
var access = await BackgroundExecutionManager.RequestAccessAsync();
foreach (var task in BackgroundTaskRegistration.AllTasks)
{
if (task.Value.Name == authBGTaskName)
{
taskRegistered = true;
//task.Value.Unregister(true);
break;
}
}
if (!taskRegistered)
{
if (access == BackgroundAccessStatus.AllowedSubjectToSystemPolicy)
{
BackgroundTaskBuilder authTaskBuilder = new BackgroundTaskBuilder();
authTaskBuilder.Name = authBGTaskName;
SecondaryAuthenticationFactorAuthenticationTrigger myTrigger = new SecondaryAuthenticationFactorAuthenticationTrigger();
authTaskBuilder.TaskEntryPoint = authBGTaskEntryPoint;
authTaskBuilder.SetTrigger(myTrigger);
BackgroundTaskRegistration taskReg = authTaskBuilder.Register();
BackgroundTaskBuilder plugTaskBuilder = new BackgroundTaskBuilder();
plugTaskBuilder.Name = authBGTaskName;
plugTaskBuilder.TaskEntryPoint = authBGTaskEntryPoint;
plugTaskBuilder.SetTrigger(deviceWatcherTrigger);
BackgroundTaskRegistration taskReg2 = plugTaskBuilder.Register();
//String taskRegName = taskReg.Name;
//BackgroundTaskBuilder rebootTaskBuilder = new BackgroundTaskBuilder();
//rebootTaskBuilder.Name = authBGTaskName;
//rebootTaskBuilder.TaskEntryPoint = authBGTaskEntryPoint;
//SystemTrigger trigger = new SystemTrigger(SystemTriggerType.UserPresent, false);
//rebootTaskBuilder.SetTrigger(trigger);
//BackgroundTaskRegistration taskReg3 = rebootTaskBuilder.Register();
//String taskRegName = taskReg.Name;
//taskReg.Progress += OnBgTaskProgress;
System.Diagnostics.Debug.WriteLine("[RegisterTask] Background task registration is completed.");
taskRegistered = true;
}
}
}
private void StartWatcher()
{
DeviceWatcherEventKind[] triggerEventKinds = { DeviceWatcherEventKind.Add, DeviceWatcherEventKind.Remove /*, DeviceWatcherEventKind.Update */ };
//IEnumerable<DeviceWatcherEventKind> triggerEventKinds = DeviceWatcherEventKind.Add;
DeviceWatcher deviceWatcher = null;
string selector = SmartCardReader.GetDeviceSelector();
selector += " AND System.Devices.DeviceInstanceId:~~\"Ledger\"";
deviceWatcher = DeviceInformation.CreateWatcher(selector, null);
DeviceWatcherTrigger deviceWatcherTrigger = deviceWatcher.GetBackgroundTrigger(triggerEventKinds);
RegisterTask(deviceWatcherTrigger);
}
private void StartWatcher()
{
DeviceWatcherEventKind[] triggerEventKinds = { DeviceWatcherEventKind.Add, DeviceWatcherEventKind.Remove, DeviceWatcherEventKind.Update };
DeviceWatcher deviceWatcher = null;
startWatcherButton.IsEnabled = false;
// First get the device selector chosen by the UI.
DeviceSelectorInfo deviceSelectorInfo = (DeviceSelectorInfo)selectorComboBox.SelectedItem;
if (null == deviceSelectorInfo.Selector)
{
// If the a pre-canned device class selector was chosen, call the DeviceClass overload
deviceWatcher = DeviceInformation.CreateWatcher(deviceSelectorInfo.DeviceClassSelector);
}
else if (deviceSelectorInfo.Kind == DeviceInformationKind.Unknown)
{
// Use AQS string selector from dynamic call to a device api's GetDeviceSelector call
// Kind will be determined by the selector
deviceWatcher = DeviceInformation.CreateWatcher(
deviceSelectorInfo.Selector,
null // don't request additional properties for this sample
);
}
else
{
// Kind is specified in the selector info
deviceWatcher = DeviceInformation.CreateWatcher(
deviceSelectorInfo.Selector,
null, // don't request additional properties for this sample
deviceSelectorInfo.Kind);
}
// Get the background trigger for this watcher
DeviceWatcherTrigger deviceWatcherTrigger = deviceWatcher.GetBackgroundTrigger(triggerEventKinds);
rootPage.NotifyUser("Starting Watcher...", NotifyType.StatusMessage);
// Register this trigger for our background task
RegisterBackgroundTask(deviceWatcherTrigger);
stopWatcherButton.IsEnabled = true;
rootPage.NotifyUser("Watcher started...", NotifyType.StatusMessage);
}
private void RegisterBackgroundTask(DeviceWatcherTrigger deviceWatcherTrigger)
{
BackgroundTaskBuilder taskBuilder;
// First see if we already have this background task registered. If so, unregister
// it before we register it with the new trigger.
foreach (var task in BackgroundTaskRegistration.AllTasks)
{
if (backgroundTaskName == task.Value.Name)
{
UnregisterBackgroundTask(task.Value);
}
}
taskBuilder = new BackgroundTaskBuilder();
taskBuilder.Name = backgroundTaskName;
taskBuilder.TaskEntryPoint = "BackgroundDeviceWatcherTaskCs.BackgroundDeviceWatcher";
taskBuilder.SetTrigger(deviceWatcherTrigger);
backgroundTaskRegistration = taskBuilder.Register();
backgroundTaskRegistration.Completed += new BackgroundTaskCompletedEventHandler(OnTaskCompleted);
}
private void RegisterBackgroundTask(DeviceWatcherTrigger deviceWatcherTrigger)
{
BackgroundTaskBuilder taskBuilder;
// First see if we already have this background task registered. If so, unregister
// it before we register it with the new trigger.
foreach (var task in BackgroundTaskRegistration.AllTasks)
{
if (backgroundTaskName == task.Value.Name)
{
UnregisterBackgroundTask(task.Value);
}
}
taskBuilder = new BackgroundTaskBuilder();
taskBuilder.Name = backgroundTaskName;
taskBuilder.TaskEntryPoint = "BackgroundDeviceWatcherTaskCs.BackgroundDeviceWatcher";
taskBuilder.SetTrigger(deviceWatcherTrigger);
backgroundTaskRegistration = taskBuilder.Register();
backgroundTaskRegistration.Completed += new BackgroundTaskCompletedEventHandler(OnTaskCompleted);
}