Windows Phone Silverlight 8.1 'BACKGROUNDTASKHOST.EXE has exited with code 1 (0x1)'

Question

I want to create a scheduled task agent for my windows phone application. I followed this link. But it seemed that the backgroud task exited wrongly. Here are some details:

I have two projects in my solution: TestApp (Windows Phone Silverlight 8.1) and ScheduledTaskAgent1 (Windows Phone Silverlight 8.1).
I have added the ScheduledTaskAgent1 as a reference of TestApp.

I have added the code below to WMAppManifest.xml in TestApp:

<Tasks>
  <DefaultTask Name ="_default" NavigationPage="MainPage.xaml" ActivationPolicy="Resume"/>
  <ExtendedTask Name="BackgroundTask">
    <BackgroundServiceAgent Specifier="ScheduledTaskAgent" Name="ScheduledTaskAgent1" Source="ScheduledTaskAgent1" Type="ScheduledTaskAgent1.ScheduledAgent" />
  </ExtendedTask>
</Tasks>

In my MainPage.xaml.cs in TestApp, I have the following code:

private async void StartPeriodicTask()
{
    periodicTask = ScheduledActionService.Find(periodicTaskName) as PeriodicTask;
    if (periodicTask != null)
    {
        try
        {
            ScheduledActionService.Remove(periodicTaskName);
        }
        catch (System.Exception)
        {
        }
    }

    periodicTask = new PeriodicTask(periodicTaskName);
    periodicTask.Description = "Lock Screen Image Changing Task";
    periodicTask.ExpirationTime = DateTime.Now.AddDays(14);

    try
    {
        ScheduledActionService.Add(periodicTask);
        System.Diagnostics.Debug.WriteLine("Periodic task added.");
#if(DEBUG_AGENT)
        System.Diagnostics.Debug.WriteLine("Starting debugging");
        ScheduledActionService.LaunchForTest(periodicTaskName, TimeSpan.FromSeconds(15));
        System.Diagnostics.Debug.WriteLine("Periodic task is started: " + periodicTaskName);
#endif
    }
    catch (InvalidOperationException e)
    {
        if (e.Message.Contains("BNS Error: The action is disabled"))
        {
            MessageBox.Show("Background agents for this application have been disabled by the user.");
        }
    }
    catch (SchedulerServiceException)
    {
        System.Diagnostics.Debug.WriteLine("Periodic task added failed.");
    }
} /* void StartPeriodicTask() */

In my ScheduledAgent.cs in ScheduledTaskAgent1, I have the following simple code:

protected override void OnInvoke(ScheduledTask task)
{
    System.Diagnostics.Debug.WriteLine("Background task accomplished.");
    NotifyComplete();   
} /* OnInvoke() */

Other code in ScheduledAgent.cs kept unchanged as it was created automatcally by VS2013.

After I started the program and called StartPeriodicTask(), I got these outputs:

'BACKGROUNDTASKHOST.EXE' (CoreCLR: DefaultDomain): Loaded 'C:\windows\system32\mscorlib.ni.dll'. Cannot find or open the PDB file.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Windows.RuntimeHost.ni.dll'. Cannot find or open the PDB file.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Windows.ni.dll'. Cannot find or open the PDB file.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Net.ni.dll'. Cannot find or open the PDB file.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\windows\system32\System.ni.dll'. Cannot find or open the PDB file.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\windows\system32\System.Xml.ni.dll'. Cannot find or open the PDB file.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\Data\Programs\{8BF294CB-9B46-4BD1-84A7-58C60582A35C}\Install\TestApp.DLL'. Symbols loaded.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\windows\system32\Microsoft.Phone.ni.dll'. Cannot find or open the PDB file.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\windows\system32\Microsoft.Phone.Interop.ni.dll'. Cannot find or open the PDB file.
'BACKGROUNDTASKHOST.EXE' (CoreCLR: Silverlight AppDomain): Loaded 'C:\Data\Programs\{8BF294CB-9B46-4BD1-84A7-58C60582A35C}\Install\ScheduledTaskAgent1.DLL'. Symbols loaded.
Background task accomplished.
The program '[0xCF0] BACKGROUNDTASKHOST.EXE' has exited with code 1 (0x1).

The last two lines showed the OnInvoke() method was called but the task exited wrongly.

So, how can I make the background task exits correctly?

Any reply will be appreciated.

Have you tried this: http://stackoverflow.com/questions/25942340/backgroundtaskhost-exe-has-exited-with-code-1-0x1-geofence-issue or this http://stackoverflow.com/questions/24988200/backgroundtaskhost-exe-exits-with-code-1-0x1 — Igor Ralic, Mar 09 '15 at 16:40
@igrali, sure! Of course I have read it. And he setted a background task in another way, but if I use `Windows Runtime Component` to build a background task, I cannot using LockScreenManger and some other lock screen api. — zsrkmyn, Mar 09 '15 at 17:13
Any Solution on above issue. I am struggling for the same. If anyone have answer please update. — Leo, Jun 30 '15 at 08:00
Had the same issue. Follow this link on how to add a project reference https://msdn.microsoft.com/en-us/library/hh708954.aspx Your Runtime Component must be listed under "References" of your Windows Phone Project — Ascot Harris, May 11 '16 at 15:01

Windows Phone Silverlight 8.1 'BACKGROUNDTASKHOST.EXE has exited with code 1 (0x1)'

0 Answers0