public async Task <bool> RestoreSavedNavigationAsync()
{
DebugWrite($"Frame: {FrameFacadeInternal.FrameId}");
try
{
var state = FrameFacadeInternal.PageStateSettingsService(GetType().ToString());
if (state == null || !state.Exists("CurrentPageType"))
{
return(false);
}
FrameFacadeInternal.CurrentPageType = Type.GetType(state.Read <string>("CurrentPageType"));
FrameFacadeInternal.CurrentPageParam = state.Read <object>("CurrentPageParam");
FrameFacadeInternal.SetNavigationState(state.Read <string>("NavigateState"));
await NavigateToAsync(NavigationMode.Refresh, FrameFacadeInternal.CurrentPageParam);
while (FrameFacadeInternal.Frame.Content == null)
{
Task.Yield().GetAwaiter().GetResult();
}
AfterRestoreSavedNavigation?.Invoke(this, FrameFacadeInternal.CurrentPageType);
return(true);
}
catch { return(false); }
}
public async Task <bool> RefreshAsync()
{
return(await NavigationOrchestratorAsync(CurrentPageType, CurrentPageParam, NavigationMode.Refresh, () =>
{
Windows.ApplicationModel.Resources.Core.ResourceContext.GetForCurrentView().Reset();
FrameFacadeInternal.SetNavigationState(FrameFacadeInternal.GetNavigationState());
return true;
}));
}
public async Task <bool> LoadAsync()
{
// load navigation state from settings
DebugWrite($"Frame: {FrameFacade.FrameId}");
try
{
var frameState = Suspension.GetFrameState();
if (frameState == null || !frameState.Exists("CurrentPageType"))
{
return(false);
}
CurrentPageType = frameState.Read <Type>("CurrentPageType");
CurrentPageParam = frameState.Read <object>("CurrentPageParam");
FrameFacadeInternal.SetNavigationState(frameState.Read <string>("NavigateState"));
while (FrameFacade.Content == null)
{
await Task.Delay(1);
}
var newPage = FrameFacade.Content as Page;
var newViewModel = newPage?.DataContext;
if (newPage?.GetType() != CurrentPageType)
{
// failed to load
return(false);
}
// newTemplate10ViewModel.Properties
if (newViewModel is INavigable)
{
Navigation.SetupViewModel(this, newViewModel as INavigable);
}
// newNavigatedAwareAsync.OnNavigatedTo
await Navigation.NavedToAsync(newPage?.DataContext, NavigationMode.New, null, null, null, newPage, CurrentPageType, CurrentPageParam);
RaiseAfterRestoreSavedNavigation();
return(true);
}
catch { return(false); }
}