private async void OnSave(object obj) { IsBusy = true; try { // Thuc hien cong viec tai day var menuLogic = new MenuLogic(_dbContext); await menuLogic.UpdateAsync(new Menu { Id = Menu.Id, ImageIcon = Menu.ImageIcon, MenuName = Menu.MenuName }); var param = new NavigationParameters(); param.Add(Keys.MENU, Menu); await NavigationService.GoBackAsync(param); } catch (Exception e) { await ShowError(e); } finally { IsBusy = false; } }