Windows Phone 8.1中的后台代理(Silverlight)

Question

我正在关注此链接以在WP 8.1 Silverlight中实现ScheduledAgent.

脚步 :-

编辑WMAppManifest.xaml:

<Tasks>
  <DefaultTask Name="_default" NavigationPage="/View/StartPage.xaml" />
  <ExtendedTask Name="BackgroundTask">
    <BackgroundServiceAgent Specifier="ScheduledTaskAgent" Name="ScheduledTaskAgent2" Source="ScheduledTaskAgent2" Type="ScheduledTaskAgent2.ScheduledAgent" />
  </ExtendedTask>
</Tasks>

添加了具有目标版本8.1的新ScheduledAgent项目.:

现在我的ScheduledAgent类

#define DEBUG_AGENT
using System;
using System.Diagnostics;
using System.Windows;
using Microsoft.Phone.Scheduler;
using Microsoft.Phone.Shell;

namespace ScheduledTaskAgent2
{
    public class ScheduledAgent : ScheduledTaskAgent
    {

         protected override void OnInvoke(ScheduledTask task)
         { 

#if DEBUG_AGENT
            ScheduledActionService.LaunchForTest(task.Name, TimeSpan.FromSeconds(60));
#endif
            NotifyComplete();         

          }
    }
}

我的代码启动代理

public const string PeriodicTaskName = "ScheduledTaskAgent2";
private PeriodicTask _periodicTask;

    private void StartPeriodicAgent()
    {
        _isPeriodicTaskStarted = true;

        _periodicTask = ScheduledActionService.Find(PeriodicTaskName) as PeriodicTask;

        if (_periodicTask != null)
        {
            RemoveAgent(PeriodicTaskName);
        }

        _periodicTask = new PeriodicTask(PeriodicTaskName) {Description = "periodic task."};

        try
        {
            ScheduledActionService.Add(_periodicTask);

#if(DEBUG_AGENT)
            ScheduledActionService.LaunchForTest(PeriodicTaskName, TimeSpan.FromSeconds(60));
#endif
         }
         catch (Exception exception){ }
    }         

    private static void RemoveAgent(string name)
    {
       try
       {
           ScheduledActionService.Remove(name);
       }
       catch (Exception){}
    }

现在这就是我为后台代理尝试过的所有内容.这不是调用OnInvoke()方法(至少在调试模式下)

注意:我还添加了对ScheduledTaskAgent2项目的引用.

是否有人在WP 8.1(Silverlight)中实现了ScheduleAgent

它是否受到支持？

Answer 1

我得到了解决方案这是完全可行的解决方案,只需复制粘贴即可.但是无法直接从文档中获取它.只需在Package.appxmanifest文件中添加此扩展名即可.你可以选择打开它right click => viewcode.

 <Extension Category="windows.backgroundTasks" EntryPoint="AgHost.BackgroundTask">
      <BackgroundTasks>
        <Task Type="systemEvent"  />
        <Task Type="timer"/>
      </BackgroundTasks>
    </Extension>