[C#] 將列舉轉換為 SelectListItem 下拉選單 (Enum To SelectListItem)

 實作

1.列舉內容

 public enum TestEnum
    {
        [Display(Name = "A", Description = "A")]
        A,
        [Display(Name = "B", Description = "B")]
        B
    }

2.建立一個 Enum-Helper

  /// <summary>
    /// Enum-Helper
    /// </summary>
    public static class EnumHelper
    {
        /// <summary>
        /// 轉換為 SelectListItem 下拉選單
        /// </summary>       
        /// <returns></returns>
        public static IEnumerable<SelectListItem> ToSelectListItem<T>() where T : struct
        {
            var type = typeof(T);
            if (!type.IsEnum)
            {
                return null;
            }
            var result = Enum.GetValues(type)
                          .Cast()
                          .Select(x => new SelectListItem
                          {
                              Value = (x.ToInt()).ToString(),
                              Text =$"Name:{x.GetName()},Description:{x.GetDescription()}" 
                          });
            return result;
        }
        /// <summary>
        /// 取得列舉值
        /// </summary>
        /// <typeparam name="T">列舉類型</typeparam>    
        /// <returns></returns>
         public static int ToInt(this Enum obj)
        {
            return Convert.ToInt32(obj);
        }
    }

3.測試與結果