static void Main(string[] args) { OrderService orderService = new OrderService(new List <Order>()); Console.Write("请输入订单数量:"); int totalOrder = Convert.ToInt32(Console.ReadLine()); for (int i = 1; i <= totalOrder; i++) { Order order = InputOrder(); try { orderService.AppendOrder(order); Console.WriteLine("\n已添加订单:"); Console.WriteLine(order); } catch (OrderException e) { Console.WriteLine(e.Message); } } int op = 0; while (op < 8) { Console.WriteLine("请选择要执行的操作:\n1.添加订单 2.删除订单 3.打印订单 4.按订单号排序 5.按订单号查询 6.按商品查询 7.按顾客姓名查询 8.退出\n"); op = Convert.ToInt32(Console.ReadLine()); switch (op) { case 1: { Order order = InputOrder(); try { orderService.AppendOrder(order); Console.WriteLine("\n已添加订单:"); Console.WriteLine(order); } catch (OrderException e) { Console.WriteLine(e.Message); } break; } case 2: { Console.Write("请输入订单号:"); int id = Convert.ToInt32(Console.ReadLine()); try { orderService.Delete(id); Console.WriteLine($"成功删除 {id} 号订单"); } catch (OrderException e) { Console.WriteLine(e.Message); } break; } case 3: { Console.WriteLine(orderService); break; } case 4: { orderService.Sort(); break; } case 5: { Console.Write("请输入订单号:"); int id = Convert.ToInt32(Console.ReadLine()); Order order = orderService.InquireByID(id); if (order != null) { Console.WriteLine("\n查询结果:"); Console.WriteLine(order); } else { Console.WriteLine("没有查找到订单"); } break; } case 6: { Console.Write("请输入商品名:"); string name = Console.ReadLine(); List <Order> result = orderService.InquireByCommodity(name); if (result != null) { result.Sort((a, b) => Convert.ToInt32(a.TotalPrice - b.TotalPrice)); OrderService temp = new OrderService(result); Console.WriteLine("\n查询结果:"); Console.WriteLine(temp); } else { Console.WriteLine("没有查找到订单"); } break; } case 7: { Console.Write("请输入顾客姓名:"); string name = Console.ReadLine(); List <Order> result = orderService.InquireByCustomer(name); if (result != null) { result.Sort((a, b) => Convert.ToInt32(a.TotalPrice - b.TotalPrice)); OrderService temp = new OrderService(result); Console.WriteLine("\n查询结果:"); Console.WriteLine(temp); } else { Console.WriteLine("没有查找到订单"); } break; } default: { Console.WriteLine("退出程序"); break; } } } }