private async void BackGround_Title()
{
try
{
await VoiceCommandDefinitionManager.InstallCommandDefinitionsFromStorageFileAsync(await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///VoiceCommand.xml")));
var status = await BackgroundExecutionManager.RequestAccessAsync();
foreach (var cur in BackgroundTaskRegistration.AllTasks)
{
if (cur.Value.Name == "TitleTask")
{
return;
}
}
var builder = new BackgroundTaskBuilder();
builder.Name = "TitleTask";
builder.TaskEntryPoint = "mediaservice.TitleUpdateTask";
builder.SetTrigger(StorageLibraryContentChangedTrigger.Create(await StorageLibrary.GetLibraryAsync(KnownLibraryId.Music)));
builder.AddCondition(new SystemCondition(SystemConditionType.InternetAvailable));
var task = builder.Register();
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
}
}
private async Task Register()
{
BackgroundExecutionManager.RemoveAccess();
var promise = await BackgroundExecutionManager.RequestAccessAsync();
if (promise == BackgroundAccessStatus.DeniedByUser || promise == BackgroundAccessStatus.DeniedBySystemPolicy)
{
return;
}
foreach (var task in BackgroundTaskRegistration.AllTasks)
{
if (task.Value.Name == TaskName)
{
task.Value.Unregister(true);
}
}
var builder = new BackgroundTaskBuilder();
builder.Name = TaskName;
builder.TaskEntryPoint = EntryPoint;
var library = await StorageLibrary.GetLibraryAsync(KnownLibraryId.Pictures);
var contentChangedTrigger = StorageLibraryContentChangedTrigger.Create(library);
builder.SetTrigger(contentChangedTrigger);
builder.IsNetworkRequested = true;
builder.CancelOnConditionLoss = true;
try
{
BackgroundTaskRegistration registration = builder.Register();
Debug.WriteLine(registration.Name);
Debug.WriteLine(registration.TaskId);
Debug.WriteLine(registration.Trigger);
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
throw;
}
}
