public MainPageViewModel()
 {
     SearchIconCommand = new DelegateCommand(SearchIconConmmandHandler, null, false);
     SearchImages(String.Empty);
     exManager = new ExceptionManager();
     navService = new NavigationService();
     SearchTextVisibility = Visibility.Collapsed;
 }
 public PhotoInfoViewModel()
 {
     BackCommand = new DelegateCommand(BackCommandHandler, null, false);
     MapCommand = new DelegateCommand(MapCommandHandler, null, false);
     navService = new NavigationService();
     flRepository = new FlickrRepository();
     exManager = new ExceptionManager();
 }
 public MapViewModel()
 {
     navService = new NavigationService();
     BackCommand = new DelegateCommand(BackCommandHandler, null, false);
 }