Longlist will not update at load - windows-phone-8

Question

I am having some problems making a long list selector load my data, and i have been unable to find a solution to this problem.
This is my xaml:
<phone:LongListSelector x:Name="animeList"
Margin="0,0,-12,0"
ItemsSource="{Binding Animes}"
Tap="AnimeList_OnTap">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,17">
<TextBlock Text="{Binding Name}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}">
<toolkit:ContextMenuService.ContextMenu>
<toolkit:ContextMenu IsZoomEnabled="false">
<toolkit:MenuItem Header="Add as favorit" Click="AddFavorite" />
</toolkit:ContextMenu>
</toolkit:ContextMenuService.ContextMenu>
</TextBlock>
</StackPanel>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
My view model is simple:
public ObservableCollection<AnimeItemViewModel> _animes { get; set; }
public ObservableCollection<AnimeItemViewModel> Animes
{
get { return _animes; }
set
{
if (value != _animes)
{
_animes = value;
NotifyPropertyChanged("Animes");
}
}
}
And how i load my data:
public MainPage()
{
InitializeComponent();
DataContext = App.ViewModel;
this.Loaded += OnLoaded;
}
private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
{
ObservableCollection<AnimeItemViewModel> _animes = new ObservableCollection<AnimeItemViewModel>();
foreach (var i in App.AnimeList.List)
_animes.Add(new AnimeItemViewModel() { AId = i.AId, Name = i.Name });
App.ViewModel.Animes = _animes;
}
And lastly just to show that there are data in the list
Update: I also have a search function, and if i enter a search text will the longlist update, but i am for some reason unable to scroll
private void OnKeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
ObservableCollection<AnimeItemViewModel> _animes = new ObservableCollection<AnimeItemViewModel>();
foreach (var i in App.AnimeList.List)
if (string.IsNullOrWhiteSpace(SearchTextBox.Text) || i.Name.ToLower().Contains(SearchTextBox.Text.ToLower()))
_animes.Add(new AnimeItemViewModel() { AId = i.AId, Name = i.Name });
App.ViewModel.Animes = _animes;
}
}

Answer 1

Try placing your loading code in OnNavigatedTo. As for the scrolling issue - setting a proper height to the StackPanel. Let me know if it works.