Load items asynchronously to a ListView after navigation to Page Windows Phone 8.1

Question

I have a Windows Phone 8.1 app in which I have a button that Navigates to PageTwo.xaml . In that PageTwo.xaml.cs , in the code behind I have something like this:

string type = "";

protected override void OnNavigatedTo(NavigationEventArgs e) {
    type = e.Parameter.ToString();          
}

private void Page_Loaded(object sender, RoutedEventArgs e) {
    PageTwoListViewModel pageTwoListViewModel = ViewModelLocator.PageTwoListStatic;
    this.DataContext = pageTwoListViewModel;
}

The reason I'm setting the DataContext in the Page_Loaded event is because the project is a ClassLibrary and I have no App.xaml file, but that shouldn't affect anything related to my problem.

Then in my PageTwoViewModel I have the following:

public RelayCommand PageLoadedCommand { get; private set; }

public PageTwoListViewModel() {
    this.PageLoadedCommand = new RelayCommand(PageLoaded);
}

private void PageLoaded() {
    LoadList();
}

private async void LoadList() {
    ObservableCollection<MyListModel> _list = await DatabaseService.GetList();
    MyViewList = _list;
}

The code responsible for triggering the PageLoadedCommand is:

<Page (...)>
    <i:Interaction.Behaviors>
        <core:EventTriggerBehavior EventName="Loaded">
            <core:InvokeCommandAction Command="{Binding PageLoadedCommand}">
            </core:InvokeCommandAction>
        </core:EventTriggerBehavior>
    </i:Interaction.Behaviors>
</Page>

The problem here is that the OnNavigatedTo and both Page_Loaded events run before the Page is visible, so if I have a big list to fill, only after everything is done does it go to PageTwo.xaml , freezing the application.
What I want to do is to navigate to PageTwo.xaml and when there, fire up a loading animation and fill my ListView asynchronously. How can I do this?

Answer 1

As it turned out, my problem came from a rather stupid thing. My DatabaseService.GetList(); was not entirely asynchronous, and that was what was causing the problem, so the above implementation works just fine as long as you guarantee the Database calls are asynchronous.