Periodictask not being executed

Question

In my WP7 app I am using a periodic task.

Whe I use the code for debugging to launch the Periodic Task it runs as expected i.e.

ScheduledActionService.LaunchForTest(periodicTaskName, TimeSpan.FromSeconds(60));

However when I just add it to the action service it will not execute i.e.

ScheduledActionService.Add(periodicTask);

The code is never executed. Its the same issue as http://forums.create.msdn.com/forums/t/91617.aspx

I have downloaded several sample apps and its the same in all of them. As soon as I comment out the LaunchForTest code then the task is not run. Its the same in the emulator and on the phone. I have checked the Phone > Settings > Background tasks and my task is there and 'on'.

The only thing I do see is the following in the output window when running in debug via the emulator

The thread '<No Name>' (0xf25003e) has exited with code 0 (0x0).

When I am running the ScheduledActionService.LaunchForTest code then I see a similar message, but I also see that assemblies have been loaded etc - and the code is performed.

Any ideas? Its very frustrating. - Thanks!

Answer 1

Make sure to check background service details are added to WPAppManifest.xml file. Below is the sample

<Tasks>
  <DefaultTask Name="_default" NavigationPage="MainPage.xaml" />
  <ExtendedTask Name="BackgroundTask">
    <BackgroundServiceAgent Specifier="ScheduledTaskAgent" Name="Task_Name" Source="Assembly_Name" Type="Assembly_Name.ScheduledAgent" />
  </ExtendedTask>
</Tasks>

A while ago i had same problem, it looks like when you add background agent project to your foreground project, it is missing update the manifest file.