//Constructor
public GuestViewModel()
{
GuestCatalogSingleton = GuestCatalogSingleton.Instance;
_newGuest = new Guest();
GuestHandler = new GuestHandler(this);
_createCommand = new RelayCommand(GuestHandler.CreateGuest);
_deleteCommand = new RelayCommand(GuestHandler.DeleteGuest, SelectedIndexIsNotSet);
_updateCommand = new RelayCommand(GuestHandler.UpdateGuest, SelectedIndexIsNotSet);
_clearCommand = new RelayCommand(GuestHandler.ClearGuest);
}
public GuestViewModel()
{
GuestCatalogSingleton = GuestCatalogSingleton.Instance;
_newGuest = new Guest();
GuestHandler = new GuestHandler(this);
CreateGuestCommand = new RelayCommand(GuestHandler.CreateGuest);
UpdateGuestCommand = new RelayCommand(GuestHandler.UpdateGuest);
DeleteGuestCommand = new RelayCommand(GuestHandler.DeleteGuest, (() => NewGuest != null && NewGuest.Id != 0));
ClearGuestCommand = new RelayCommand(GuestHandler.ClearGuest);
}
