Question

首先我为PushNotificationTrigger注册了后台任务 - 这里没问题，我可以在BackgroundTaskRegistration.AllTasks中找到它。但推送通知没有任何活动。并且调试告诉我注册的任务没有触发器 - 尽管我使用PushNotificationTrigger注册了它。我错过了什么吗？

private BackgroundTaskRegistration RegisterBackgroundTask(string taskName, IBackgroundTrigger connectedTrigger)
{
    bool taskRegistered = false;
    BackgroundTaskRegistration backgroundTask = null;

    foreach (var task in BackgroundTaskRegistration.AllTasks)
    {
        if (task.Value.Name == taskName)
        {
            taskRegistered = true;
            backgroundTask = (BackgroundTaskRegistration)task.Value;
            break;
        }
    }

    if (!taskRegistered)
    {
        var builder = new BackgroundTaskBuilder();

        builder.Name = taskName;
        builder.TaskEntryPoint = taskName;
        builder.SetTrigger(connectedTrigger);
        backgroundTask = builder.Register();
        backgroundTask.Completed += new BackgroundTaskCompletedEventHandler(OnCompleted);
        backgroundTask.Progress += new BackgroundTaskProgressEventHandler(BackgroundTask_Progress);
    }
    return backgroundTask;
}

async private void OnCompleted(IBackgroundTaskRegistration sender, BackgroundTaskCompletedEventArgs e)
{
    string toastVisual = "<visual><binding template='ToastGeneric'><text>Eine Testnachricht</text><text>OnCompleted has triggered</text></binding></visual>";
    string toastSound = "<audio src=\"ms-appx:///Sounds/blupp.wav\" loop=\"false\"/>";
    string toastXmlString = String.Format(@"<toast>{0}{1}</toast>", toastVisual, toastSound);

    XmlDocument toastXml = new XmlDocument();
    toastXml.LoadXml(toastXmlString);

    var toast = new ToastNotification(toastXml);

    DateTime expdate = DateTime.Now.AddDays(1);
    toast.ExpirationTime = expdate;

    ToastNotificationManager.CreateToastNotifier().Show(toast);
}

private void BackgroundTask_Progress(BackgroundTaskRegistration sender, BackgroundTaskProgressEventArgs args)
{
    string toastVisual = "<visual><binding template='ToastGeneric'><text>Eine Testnachricht</text><text>OnProgress has triggered</text></binding></visual>";
    string toastSound = "<audio src=\"ms-appx:///Sounds/blupp.wav\" loop=\"false\"/>";
    string toastXmlString = String.Format(@"<toast>{0}{1}</toast>", toastVisual, toastSound);

    XmlDocument toastXml = new XmlDocument();
    toastXml.LoadXml(toastXmlString);

    var toast = new ToastNotification(toastXml);

    DateTime expdate = DateTime.Now.AddDays(1);
    toast.ExpirationTime = expdate;

    ToastNotificationManager.CreateToastNotifier().Show(toast);
}

接下来我尝试用BackGround类解决。但是通过该解决方案，我无法找到任何已注册的任务。我想我错过了一些开始，但无法弄清楚是什么。

public async void Run(IBackgroundTaskInstance taskInstance)
{
    BackgroundTaskDeferral _deferral = taskInstance.GetDeferral();

    System.Diagnostics.Debug.WriteLine("BackgroundTasks here");

    var taskRegistered = false;
    var taskName = "alertPushNotification";

    foreach (var task in BackgroundTaskRegistration.AllTasks)
    {
        if (task.Value.Name == taskName)
        {
            taskRegistered = true;
            break;
        }
    }

    if (!taskRegistered)
    {
        var builder = new BackgroundTaskBuilder();

        builder.Name = taskName;
        builder.TaskEntryPoint = "RuntimeComponent1.ExampleBackgroundTask";
        builder.SetTrigger(new PushNotificationTrigger());
        BackgroundTaskRegistration task = builder.Register();
        task.Completed += new BackgroundTaskCompletedEventHandler(OnCompleted);
    }

    _deferral.Complete();
}

private void OnCompleted(IBackgroundTaskRegistration task, BackgroundTaskCompletedEventArgs args)
{
    string toastVisual = "<visual><binding template='ToastGeneric'><text>Eine Testnachricht</text><text>OnCompleted has triggered</text></binding></visual>";
    string toastSound = "<audio src=\"ms-appx:///Sounds/blupp.wav\" loop=\"false\"/>";
    string toastXmlString = String.Format(@"<toast>{0}{1}</toast>", toastVisual, toastSound);

    XmlDocument toastXml = new XmlDocument();
    toastXml.LoadXml(toastXmlString);

    var toast = new ToastNotification(toastXml);

    DateTime expdate = DateTime.Now.AddDays(1);
    toast.ExpirationTime = expdate;

    ToastNotificationManager.CreateToastNotifier().Show(toast);
}

private void OnProgress(IBackgroundTaskRegistration task, BackgroundTaskProgressEventArgs args)
{
    string toastVisual = "<visual><binding template='ToastGeneric'><text>Eine Testnachricht</text><text>OnProgress has triggered</text></binding></visual>";
    string toastSound = "<audio src=\"ms-appx:///Sounds/blupp.wav\" loop=\"false\"/>";
    string toastXmlString = String.Format(@"<toast>{0}{1}</toast>", toastVisual, toastSound);

    XmlDocument toastXml = new XmlDocument();
    toastXml.LoadXml(toastXmlString);

    var toast = new ToastNotification(toastXml);

    DateTime expdate = DateTime.Now.AddDays(1);
    toast.ExpirationTime = expdate;

    ToastNotificationManager.CreateToastNotifier().Show(toast);
}

}

有没有人可以给我一个提示，我错过了哪些代码？

PushNotifications的Backgroundtask失去了他的触发器

0 个答案: