public MainPage()
{
this.InitializeComponent();
if (!ViewModelBase.IsInDesignModeStatic)
{
ViewModel = new MainPageViewModel();
DataContext = ViewModel;
this.Loaded += OnLoaded;
}
}
protected override void SaveState(Dictionary<String, Object> pageState)
{
MessengerHelper.Unregister(this, MessengerHelper.SearchHistoryDeleted);
MessengerHelper.Unregister(this, MessengerHelper.DownloadsDeleted);
MessengerHelper.Unregister(this, MessengerHelper.DbLoadCompleted);
var state = ViewModel.SaveState();
state.SearchHistoryVerticalOffset = ScrollViewerHelpers.GetVerticalOffset(searchHistoryListView);
state.DownloadsVerticalOffset = ScrollViewerHelpers.GetVerticalOffset(downloadsListView);
string serializedState = SerializationHelper.SerializeToString(state);
pageState[Constants.MainPageState] = serializedState;
// OnNavigatedFrom would be called *before* SaveState (unless we call base. first), that's why we destroy the references here
DataContext = null;
ViewModel = null;
}
