当值不同时，我如何在映射响应上使用开关响应？

Question

我一直在尝试在映射的响应上使用switch语句来确定它是一周中的哪一天。根据响应，向用户写入一个字符串。例如，对于星期一，写.Monday是第一个工作日。对于星期二，写。星期二是第二个工作日。等等。

我曾尝试如下所述和C＃不允许使用或||操作员可以帮助我吗？

using System; 

enum WeekDay { Sunday = 0, Monday = 1, Tuesday, Thursday, Friday, Saturday }; 

static void Main(string[] args) 
{ 
    { 
     Console.WriteLine("What day is today"); 
     String strday = Console.ReadLine(); 

     WeekDay Result = WeekDay.Sunday; 
     WeekDay Result1 = WeekDay.Monday; 
     WeekDay Result2 = WeekDay.Tuesday; 

     switch (Result) 
     { 
      case WeekDay.Sunday: 
      Console.WriteLine("Sunday is a first day"); 
      break; 
     } 

     switch (Result1) 
     { 
      case WeekDay.Monday: 
      Console.WriteLine("Monday is a second day"); 
      break; 
     } 

     Console.ReadLine(); 
    } 
} 

}

Answer 1

这是因为你的开关的语法是有点过。你是100％正确的，交换机不允许& &或||操作。我想你会想要这样的事情：

DateTime curDate = DateTime.Now; 

    switch(curDate.DayofWeek) //day of week is an enum, you can .ToString() it to compare against "Monday", "Tuesday", etc... or leave it as an INT, your call. 
    { 
     case (1): 
      Console.WriteLine("Sunday is first day") 
      break; 
     case (2): 
      Console.WriteLine("Monday is second day") 
      break; 
     etc... 
    }