public static void QueryMenu(int i, OrderService os, ref bool flag)
{
switch (i)
{
case 1:
Console.WriteLine("输入客户姓名：");
os.DisplayOrders(os.QueryByName(Console.ReadLine()));
break;
case 2:
Console.WriteLine("输入订单时间");
DateTime.TryParse(Console.ReadLine(), out DateTime time);
os.DisplayOrders(os.QueryByOrderTime(time));
break;
case 3:
Console.WriteLine("输入订单ID：");
Int32.TryParse(Console.ReadLine(), out int id);
os.DisplayOrders(os.QueryByID(id));
break;
case 4:
Console.WriteLine("输入查询条件：（例如： >10 <10 =10）");
string input_price = Console.ReadLine();
float.TryParse(input_price.Substring(1, input_price.Length - 1), out float price);
switch (input_price[0])
{
case '>':
os.DisplayOrders(os.QueryByCertainPrice(x => x > price));
break;
case '<':
os.DisplayOrders(os.QueryByCertainPrice(x => x < price));
break;
case '=':
os.DisplayOrders(os.QueryByCertainPrice(x => x == price));
break;
}
break;
case 5:
Console.WriteLine("输入查询条件：（例如： >2009-05-01 14:57:32.8）");
string input_time = Console.ReadLine();
DateTime.TryParse(input_time.Substring(1, input_time.Length - 1), out DateTime certainTime);
switch (input_time[0])
{
case '>':
os.DisplayOrders(os.QueryByCertainTime(x => x > certainTime));
break;
case '<':
os.DisplayOrders(os.QueryByCertainTime(x => x < certainTime));
break;
case '=':
os.DisplayOrders(os.QueryByCertainTime(x => x == certainTime));
break;
}
break;
case 6:
os.DisplayOrders(os.OrderByID(os.GetOrders()));
break;
case 7:
os.DisplayOrders(os.OrderByTime(os.GetOrders()));
break;
case 8:
os.DisplayOrders(os.OrderByPrice(os.GetOrders()));
break;
case 0:
flag = false;
break;
default:
Console.WriteLine("菜单中无此项");
break;
}
}
