没有得到Enum的预期结果

Question

enum DaysInMonth
    {
        Jan = 31, Feb = 28, Mar = 31, Apr = 30, May = 31, Jun = 30,
        Jul = 31, Aug = 31, Sep = 30, Oct = 31, Nov = 30, Dec = 31
    };
DaysInMonth dm = DaysInMonth.Dec;
        Console.WriteLine($"Number of days in {dm} is {dm:D}");

获取7月份的天数为31天，预计12月份的天数为31

Answer 1

对一个月内的天数进行硬编码并不是一个好主意。闰年怎么样？

一个月内获得天数的正确方法：

DateTime.DaysInMonth(year, month)

Answer 2

您正在尝试使用Enum。所以请尝试以下代码。

enum DaysInMonth
        {
            Jan = 31, Feb = 28, Mar = 31, Apr = 30, May = 31, Jun = 30,
            Jul = 31, Aug = 31, Sep = 30, Oct = 31, Nov = 30, Dec = 31
        };



static void Main(string[] args)
        {
            DaysInMonth dm = DaysInMonth.Dec;
            Console.WriteLine("Number of days in {0} is {1} : ", dm, (int)dm);
            Console.ReadKey();
        }