private async void CrystalApplication_EnteredBackground(object sender, EnteredBackgroundEventArgs e)
{
/// https://blogs.windows.com/buildingapps/2016/06/07/background-activity-with-the-single-process-model/
/// Corresponds to EnteredBackground event. State should now be saved here.
var deferral = e.GetDeferral();
try
{
await PreservationManager.PreserveAsync(OnBackgroundingAsync());
}
catch (Exception)
{
}
finally
{
deferral.Complete();
}
}
private async Task InitializeRootFrameAsync(IActivatedEventArgs e)
{
InitializeIoC();
var rootFrame = Window.Current.Content as Frame;
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active
if (rootFrame == null)
{
// Create a Frame to act as the navigation context and navigate to the first page
rootFrame = new Frame();
//rootFrame.NavigationFailed += OnNavigationFailed;
// Place the frame in the current Window
Window.Current.Content = rootFrame;
var navManager = new NavigationManager(this);
var navService = new FrameNavigationService(rootFrame, navManager);
navService.NavigationLevel = FrameLevel.One;
navManager.RootNavigationService = navService;
InitializeNavigation(navManager);
}
await OnApplicationInitializedAsync();
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//Resurrection!
IStorageItem suspensionStateFileItem = await CrystalApplication.CrystalDataFolder.TryGetItemAsync(PreservationManager.SuspensionStateFileName);
if (suspensionStateFileItem != null)
{
StorageFile suspensionStateFile = (StorageFile)suspensionStateFileItem;
var eventArgs = new CrystalApplicationShouldRestoreEventArgs();
eventArgs.SuspensionFileDate = suspensionStateFile.DateCreated;
if (OnApplicationShouldRestore(eventArgs))
{
if (await PreservationManager.RestoreAsync() == true)
{
//navService.HandleTerminationReload();
//todo handle multiple windows in this case.
try
{
await suspensionStateFile.DeleteAsync();
}
catch (Exception)
{
}
IsRestored = true;
if (Restored != null)
{
Restored(this, EventArgs.Empty);
}
}
}
}
}
// Ensure the current window is active
//Window.Current.Activate();
HandleBackNavigation();
WindowManager.GetStatusManagerForCurrentView().Initialize();
}
