public TourViewModel() { CreateTourCommand = new DelegateCommand <string[]>(str => { if ((str[0] != "") && (str[1] != "") && (str[2] != "") && (str[3] != "") && (str[4] != "") && (str[5] != "")) { TourModel.CreatePersonalTicket(str[0], str[1], str[2], str[3], str[4], Convert.ToInt32(str[5])); EnterModel.Close_Tour_Window(); } else { MessageBox.Show("Вы заполнили не все поля!"); } }); AvailableCounties = TourModel.AddItemsToComboBox("Country"); }