C#枚举

  /// <summary>
    /// 枚举
    /// </summary>
    enum TimeOfDay
    {
        Morning =1 ,
        Afternoon =2,
        Evening =3
    }
    /// <summary>
    /// 使用枚举的类
    /// </summary>
    class Program
    {
        public static void Main(string[] args)
        {
            Greeting(TimeOfDay.Morning);
            Greeting(TimeOfDay.Afternoon);
            Greeting(TimeOfDay.Evening);
            PrintValueOfDay(TimeOfDay.Morning);
            GetNameByValue(1);
            Console.ReadKey();
        }
        /// <summary>
        /// 打招呼方法
        /// </summary>
        /// <param name="timeOfDay">每一天的时间段</param>
        static  void Greeting(TimeOfDay timeOfDay)
        {
            switch (timeOfDay)
            {
                case TimeOfDay.Morning:
                    Console.WriteLine("Hello Morning!");
                    break;
                case TimeOfDay.Afternoon:
                    Console.WriteLine("Hello Afternoon!");
                    break;
                case TimeOfDay.Evening:
                    Console.WriteLine("Hello Evening!");
                    break;
            }
        }
        /// <summary>
        /// 打印枚举变量的值
        /// </summary>
        /// <param name="timeOfDay">枚举变量</param>
        private static void PrintValueOfDay(TimeOfDay timeOfDay)
        {
            //Enum.Parse()三个参数依次为枚举类型，要转化的字符串，是否忽略大小写
             int result = Convert.ToInt32(Enum.Parse(typeof(TimeOfDay), timeOfDay.ToString(), true));
             Console.WriteLine("枚举变量"+timeOfDay.ToString()+"的值为"+result);
        }
        /// <summary>
        /// 由枚举名值获得名称
        /// </summary>
        /// <param name="value"></param>
        private static void  GetNameByValue(int value)
        {
           Console.WriteLine("枚举中"+value+"对应的枚举名是"+Enum.GetName(typeof(TimeOfDay),1));
        }