怎么求枚举类型中的枚举值的名称

Question

比如说一个枚举类型，
enum weekday
  { 
     sun=1,
mon=2,
tue=3,
wed=4,
thu=5,
fri=6,
sat=7
 } 
怎么在一个程序中求枚举值等于4的名称（也就是希望返回wed)，返回字符串类型 

Answer 1

ToString就可以输出字符串了啊

Answer 2

我现在不知道是WED，只是知道值是4呀

Answer 3

            weekday test = (weekday)4;
            MessageBox.Show(test.ToString());

Answer 4

Enum.Parse(typeof(weekday), "4").ToString();

Answer 5

        private String GetWeekDay(int day)
        {
            String strDay = String.Empty;
            switch (day)
            {
                case (int)weekday.sun:
                    strDay = weekday.sun.ToString();
                    break;
                case (int)weekday.mon:
                    strDay = weekday.mon.ToString();
                    break;
                case (int)weekday.tue:
                    strDay = weekday.tue.ToString();
                    break;
                case (int)weekday.wed:
                    strDay = weekday.wed.ToString();
                    break;
                case (int)weekday.thu:
                    strDay = weekday.thu.ToString();
                    break;
                case (int)weekday.fri:
                    strDay = weekday.fri.ToString();
                    break;
                case (int)weekday.sat:
                    strDay = weekday.sat.ToString();
                    break;
            }
            return strDay;
        }        private void button1_Click(object sender, EventArgs e)
        {
            String strDay = GetWeekDay(4);
            Console.WriteLine(strDay);
        }

Answer 6

 MessageBox.Show( weekday.wed.ToString());