public void OrderS(int x) { switch (x) { case 1: Console.WriteLine("please input name:"); String CName = Console.ReadLine(); Console.WriteLine("please input production:"); String PName = Console.ReadLine(); Console.WriteLine("please input phone:"); String Phone = Console.ReadLine(); orderservice.AddOrder(CName, PName, Phone, orderlist); break; case 2: Console.WriteLine("please input ordernumber:"); String s = Console.ReadLine(); orderservice.DeleteOrder(s, orderlist); break; case 3: Console.WriteLine("please input number:"); String s1 = Console.ReadLine(); Console.WriteLine("1(change name) 2(change production)"); String s2 = Console.ReadLine(); int n = Int32.Parse(s2); String ne = Console.ReadLine(); orderservice.ChangeOrder(s1, n, ne, orderlist); break; case 4: Console.WriteLine("1(search num)、2(search name)、3(search production)"); int x2 = Int32.Parse(Console.ReadLine()); Console.WriteLine("Please input key word:"); String v = Console.ReadLine(); Console.WriteLine("number\tname\tproduction"); orderservice.SearchOrder(x2, v, orderlist); break; case 5: orderservice.Export(orderlist); break; case 6: orderservice.Import(orderlist); break; } }