C#通过反射进行枚举描述相关操作

C#可以通过反射，来获取枚举的描述信息或通过描述信息获取到指定类型的枚举

 /// <summary>
 /// 获取枚举描述
 /// </summary>
 /// <param name="enumName"></param>
 /// <returns></returns>
 public static string GetDescription(this Enum enumName)
 {
     string description;
     FieldInfo fieldInfo = enumName.GetType().GetField(enumName.ToString());
     DescriptionAttribute[] attributes = fieldInfo.GetDescriptAttr();
     if (attributes != null && attributes.Length > )
         description = attributes[].Description;
     else
         throw new ArgumentException($"{enumName} 未能找到对应的枚举描述.", nameof(enumName));
     return description;
 }

 /// <summary>
 /// 获取枚举描述属性
 /// </summary>
 /// <param name="fieldInfo"></param>
 /// <returns></returns>
 private static DescriptionAttribute[] GetDescriptAttr(this FieldInfo fieldInfo)
 {
     return (DescriptionAttribute[])fieldInfo?.GetCustomAttributes(typeof(DescriptionAttribute), false);
 }

 /// <summary>
 /// 通过描述获取枚举值
 /// </summary>
 /// <typeparam name="TEnum"></typeparam>
 /// <param name="description"></param>
 /// <returns></returns>
 public static TEnum GetEnum<TEnum>(string description)
 {
     Type type = typeof(TEnum);
     foreach (FieldInfo field in type.GetFields())
     {
         DescriptionAttribute[] curDesc = field.GetDescriptAttr();
         if (curDesc != null && curDesc.Length > )
         {
             if (curDesc[].Description == description)
                 return (TEnum)field.GetValue(null);
         }
         else
         {
             if (field.Name == description)
                 return (TEnum)field.GetValue(null);
         }
     }
     throw new ArgumentException($"{description} 未能找到对应的枚举.", nameof(description));
 }