/// <summary>
/// The register task.
/// </summary>
private static async void PushNotifications()
{
const string PushNotificationTaskName = "ToastNotifications";
if (GetRegisteredTask(PushNotificationTaskName) != null)
{
return;
}
var ns = new NotificationStore();
ns.Register();
await BackgroundExecutionManager.RequestAccessAsync();
await ObtainLockScreenAccess();
var taskBuilder = new BackgroundTaskBuilder
{
Name = PushNotificationTaskName,
TaskEntryPoint = typeof(PushNotificationTask).FullName
};
var trigger = new PushNotificationTrigger();
taskBuilder.SetTrigger(trigger);
var internetCondition = new SystemCondition(SystemConditionType.InternetAvailable);
taskBuilder.AddCondition(internetCondition);
try
{
taskBuilder.Register();
}
catch (Exception exception)
{
}
}
public static void Register()
{
foreach (var iter in BackgroundTaskRegistration.AllTasks)
{
IBackgroundTaskRegistration mytask = iter.Value;
if (mytask.Name == "ExampleBackgroundTask")
{
mytask.Unregister(true);
break;
}
}
var builder = new BackgroundTaskBuilder();
PushNotificationTrigger trigger = new PushNotificationTrigger();
builder.SetTrigger(trigger);
builder.Name = "ExampleBackgroundTask";
builder.TaskEntryPoint = "Usergrid.Notifications.ExampleBackgroundTask";
ExampleBackgroundTask.task = builder.Register();
task.Progress += task_Progress;
task.Completed += task_Completed;
}
private async void registerButton_Click(object sender, RoutedEventArgs e)
{
TimeTrigger timetrigger = new TimeTrigger(30, false);
PushNotificationTrigger notificationTrigger = new PushNotificationTrigger();
var SampleTask = new BackgroundTaskBuilder(); //创建后台任务实例
SampleTask.Name = "Reminder"; //指定后台任务名称
SampleTask.TaskEntryPoint = "ReminderComponent.Reminder";//指定后台任务名称
SampleTask.SetTrigger(timetrigger);//指定后台任务的触发器
SystemCondition internetCondition = new SystemCondition(SystemConditionType.InternetAvailable);
SampleTask.AddCondition(internetCondition);
var access = await BackgroundExecutionManager.RequestAccessAsync();
if (access == BackgroundAccessStatus.AllowedMayUseActiveRealTimeConnectivity)
{
BackgroundTaskRegistration task = SampleTask.Register();
task.Progress += Value_Progress; ;
task.Completed += Value_Completed; ;
UpdateUI("", "注册成功");
registerButton.IsEnabled = false;
cancelButtton.IsEnabled = true;
var settings = Windows.Storage.ApplicationData.Current.LocalSettings;
settings.Values.Remove(task.Name);
}
else if (access == BackgroundAccessStatus.Denied)//用户禁用后台任务或后台任务数量已达最大
{
await new MessageDialog("您已禁用后台任务或后台任务数量已达最大!").ShowAsync();
}
}
private void RegisterBackgroundTask()
{
BackgroundTaskBuilder taskBuilder = new BackgroundTaskBuilder();
PushNotificationTrigger trigger = new PushNotificationTrigger();
taskBuilder.SetTrigger(trigger);
// Background tasks must live in separate DLL, and be included in the package manifest
// Also, make sure that your main application project includes a reference to this DLL
taskBuilder.TaskEntryPoint = SAMPLE_TASK_ENTRY_POINT;
taskBuilder.Name = SAMPLE_TASK_NAME;
try
{
BackgroundTaskRegistration task = taskBuilder.Register();
task.Completed += BackgroundTaskCompleted;
}
catch (Exception ex)
{
rootPage.NotifyUser("Registration error: " + ex.Message, NotifyType.ErrorMessage);
UnregisterBackgroundTask();
}
}