public static void Start() { Console.WriteLine("请选择操作:1.查询所有订单 2.增加订单 3.删除订单 4.修改订单"); string choose = Console.ReadLine(); if (choose == "1") { OrderService.SearchInfo(); } else if (choose == "2") { OrderService.AddInfo(); } else if (choose == "3") { OrderService.DeleteInfo(); } else if (choose == "4") { OrderService.ReviseInfo(); } else { Console.WriteLine("请输入正确格式"); } }