如何在WP8中关闭win应用程序时进行Toast通知?

时间:2013-05-14 12:14:25

标签: c# windows-phone-7 windows-phone-8

我想实现Toast和Tile通知。我的通知必须符合某些条件,例如它需要能够在我的应用关闭时运行。例如,生日提醒可以在应用关闭时在后台运行。

我发现的样本:

ShellToast toast = new ShellToast();
toast.Title = "Toast Title: ";
toast.Content = "TEST";
toast.Show();

以上示例在应用程序运行时有效。这是我的代码:

    private void StartPeriodicAgent()
    {
        // Variable for tracking enabled status of background agents for this app.
        agentsAreEnabled = true;

        // Obtain a reference to the period task, if one exists
        periodicTask = ScheduledActionService.Find(periodicTaskName) as PeriodicTask;

        // If the task already exists and background agents are enabled for the
        // application, you must remove the task and then add it again to update 
        // the schedule
        if (periodicTask != null)
        {
            RemoveAgent(periodicTaskName);
        }

        periodicTask = new PeriodicTask(periodicTaskName);

        periodicTask.ExpirationTime = System.DateTime.Now.AddDays(1);

        // The description is required for periodic agents. This is the string that the user
        // will see in the background services Settings page on the device.
        periodicTask.Description = "This demonstrates a periodic task.";

        // Place the call to Add in a try block in case the user has disabled agents.

        ScheduledActionService.Add(periodicTask);
    }

  private void RunBackgroundWorker()
    {
        //PhoneCallTask calltask = new PhoneCallTask();
        //calltask.PhoneNumber = "03336329631";
        //calltask.DisplayName = "arslan";
        //calltask.Show();


        BackgroundWorker backroungWorker = new BackgroundWorker();

        backroungWorker.DoWork += ((s, args) =>
        {
            Thread.Sleep(10000);
        });

        backroungWorker.RunWorkerCompleted += ((s, args) =>
        {
            this.Dispatcher.BeginInvoke(() =>
            {
                var toast = new ToastPrompt
                {
                    Title = "Simple usage",
                    Message = "Message"
                };
                toast.Show();




            }
        );
        });
        backroungWorker.RunWorkerAsync();
    }

但我没有收到任何通知。任何人都可以告诉我如何设置应用程序未运行时有效的通知吗?

1 个答案:

答案 0 :(得分:2)

BackgroundWorker与您计划定期运行的计划任务不同。

添加Windows Phone计划任务代理,并在该项目中编写代码逻辑,以调用生成吐司所需的调用。

protected override void OnInvoke(ScheduledTask task)
{
  ------------------------------------------------
  Your code for scheduled task running.
} 

完成代码后,一旦计划任务的工作结束,您就可以调用NotifyComplete()来指示。

backgroundworker 只是在一个单独的线程中运行您的代码,除了事实之外,没有与计划任务的关联;您可以在计划任务中使用后台线程。

为了在主应用程序和计划任务之间共享您的逻辑: - 创建一个单独的项目并在其中放入可重用/共享代码。 请参阅主应用程序和计划任务中的此信息以共享/访问变量。

在单独的项目中使用IsolatedStorageFile和Mutex,并在两者之间共享DLL

*计划任务示例的随机参考:http://wildermuth.com/2011/9/6/Periodic_Agents_on_Windows_Phone_7_1 *