public async void Run(IBackgroundTaskInstance taskInstance)
{
// Don't place any code (including debug code) before GetDeferral!!!
// Get a deferral, to prevent the task from closing prematurely
// while asynchronous code is still running.
deferral = taskInstance.GetDeferral();
taskInstance.Canceled += new BackgroundTaskCanceledEventHandler(OnCanceled);
var tbtLog = await ApplicationData.Current.LocalFolder.CreateFileAsync("UserAwayBackTaskLog.txt", CreationCollisionOption.ReplaceExisting);
var s = await tbtLog.OpenStreamForWriteAsync();
var sw = new StreamWriter(s);
sw.WriteLine("Background task start time: " + DateTime.Now.ToString());
try
{
sw.WriteLine("Unregister all background tasks start: " + DateTime.Now.ToString());
BackTaskReg.unregisterBackTask("TimerTaq.BackTask");
BackTaskReg.unregisterBackTask("HasNetTaq.BackTask");
sw.WriteLine("Unregister all background tasks end: " + DateTime.Now.ToString());
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
finally
{
sw.WriteLine("Background task end time: " + DateTime.Now.ToString());
sw.Flush();
s.Dispose();
// Inform the system that the task is finished.
deferral.Complete();
}
}
public async Task <int> backTaskUpdateTiles()
{
if (isUpdateCompleted == true)
{
isUpdateCompleted = false;
ApplicationTrigger trigger = new ApplicationTrigger();
var btr = await BackTaskReg.RegisterBackgroundTask("BackTaskUpdateTiles", "Taq.BackTask.BackTaskUpdateTiles", trigger);
btr.Completed += Btr_Completed;
var result = await trigger.RequestAsync();
}
return(0);
}
public async void Run(IBackgroundTaskInstance taskInstance)
{
// Don't place any code (including debug code) before GetDeferral!!!
// Get a deferral, to prevent the task from closing prematurely
// while asynchronous code is still running.
deferral = taskInstance.GetDeferral();
taskInstance.Canceled += new BackgroundTaskCanceledEventHandler(OnCanceled);
var tbtLog = await ApplicationData.Current.LocalFolder.CreateFileAsync("AfterUpdateLog.txt", CreationCollisionOption.ReplaceExisting);
var s = await tbtLog.OpenStreamForWriteAsync();
var sw = new StreamWriter(s);
sw.WriteLine("Background task start time: " + DateTime.Now.ToString());
try
{
sw.WriteLine("Unregister old background tasks start: " + DateTime.Now.ToString());
foreach (var task in BackgroundTaskRegistration.AllTasks)
{
if (task.Value.Name != "AfterUpdateBackTask")
{
task.Value.Unregister(true);
}
}
sw.WriteLine("Unregister old background tasks end: " + DateTime.Now.ToString());
sw.WriteLine("Register new background tasks start: " + DateTime.Now.ToString());
/*
* await BackTaskReg.RegisterBackgroundTask("UserPresentBackTask", "Taq.BackTask.UserPresentBackTask", new SystemTrigger(SystemTriggerType.UserPresent, false));
* await BackTaskReg.RegisterBackgroundTask("UserAwayBackTask", "Taq.BackTask.UserAwayBackTask", new SystemTrigger(SystemTriggerType.UserAway, false));*/
await BackTaskReg.UserPresentTaskReg(Convert.ToUInt32(localSettings.Values["BgUpdatePeriod"]));
sw.WriteLine("Register new background tasks end: " + DateTime.Now.ToString());
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
finally
{
sw.WriteLine("Background task end time: " + DateTime.Now.ToString());
sw.Flush();
s.Dispose();
// Inform the system that the task is finished.
deferral.Complete();
}
}
public async Task <int> UserPresentTaskReg(uint timerPeriod)
{
// Update by timer.
var btr = await BackTaskReg.backUpdateReg("Timer", new TimeTrigger(timerPeriod, false));
btr.Completed += Btr_Completed;
// Update if the Internet is available.
/*
* var btr2 = await BackTaskReg.backUpdateReg("HasNet", new SystemTrigger(SystemTriggerType.InternetAvailable, false));
* btr2.Completed += Btr_Completed;
* var btr3 = await BackTaskReg.backUpdateReg("UserPresent", new SystemTrigger(SystemTriggerType.UserPresent, false));
* btr3.Completed += Btr_Completed;*/
return(0);
}
async Task <int> initBackTask()
{
if (app.vm.m.localSettings.Values["BgUpdatePeriod"] == null)
{
app.vm.BgUpdatePeriodId = 0;
}
else
{
app.vm.BgUpdatePeriodId = app.vm.bgUpdatePeriods.FindIndex(x => x == (int)app.vm.m.localSettings.Values["BgUpdatePeriod"]);
}
if (app.vm.m.localSettings.Values["BgMainSiteAutoPos"] == null)
{
app.vm.m.localSettings.Values["BgMainSiteAutoPos"] = false;
}
await BackTaskReg.RegisterBackgroundTask("AfterUpdateBackTask", "Taq.BackTask.AfterUpdate", new SystemTrigger(SystemTriggerType.ServicingComplete, false));
//await BackTaskReg.RegisterBackgroundTask("UserPresentBackTask", "Taq.BackTask.UserPresentBackTask", new SystemTrigger(SystemTriggerType.UserPresent, false));
// Update if user aways.
//await BackTaskReg.RegisterBackgroundTask("UserAwayBackTask", "Taq.BackTask.UserAwayBackTask", new SystemTrigger(SystemTriggerType.UserAway, false));
await UserPresentTaskReg(Convert.ToUInt32(app.vm.m.localSettings.Values["BgUpdatePeriod"]));
return(0);
}