public HomePage()
{
this.InitializeComponent();
this.navigationHelper = new NavigationHelper(this);
this.navigationHelper.LoadState += navigationHelper_LoadState;
_viewModel = MainViewModel.Single();
_viewModel.NavigateAction = (evt) => Frame.Navigate(typeof(EventPage), evt);
this.DataContext = _viewModel;
this.Loaded += HomePage_Loaded;
}
public static MainViewModel Single()
{
// assume use on UI thread
if (_instance == null)
{
_instance = new MainViewModel();
}
return _instance;
}
