static void Main(string[] args) { OrderDetails order1 = new OrderDetails("20181005001", "John", "Apple", 2.5, 3); OrderDetails order2 = new OrderDetails("20181005002", "Anna", "Apple", 2.5, 4); OrderDetails order3 = new OrderDetails("20181005003", "John", "Pear", 3.5, 3); OrderDetails order4 = new OrderDetails("20181005004", "Peter", "Orange", 3, 3); OrderDetails order5 = new OrderDetails("20181005004", "Peter", "Watermelen", 10, 1000); OrderService MyService = new OrderService(); try { MyService.addOrder(order1); MyService.addOrder(order2); MyService.addOrder(order3); MyService.addOrder(order4); MyService.addOrder(order5); //MyService.showAll(); MyService.changeOrder(order4); //MyService.showAll(); MyService.searchOrder("订单号", "20181005004"); MyService.searchOrder("订单总额", "10000"); MyService.deleteOrder(order4); //MyService.showAll(); } catch (MyException e) { Console.WriteLine(e.Message); } }