C#枚举案例

一、普通调用

	public enum NoticeType
        {
            Notice = 'A',
            LabRule = 'H',
            HotInformation = 'N',
            Column = 'C',
            All = '1',
            Null = '0'
        }
        private void button1_Click(object sender, EventArgs e)
        {
            //新建枚举类型
            NoticeType noticeType1 = NoticeType.Column;

            //把枚举类型转换为string d="Column"
            string d = noticeType1.ToString();

            //取得枚举类型的基数 'C'
            char dd = (char)noticeType1;

            //通过基数取得对应的枚举类型 
            NoticeType noticeType2 = (NoticeType)Char.Parse("A");//Notice

            //通过名称取得枚举类型 
            NoticeType noticeType3 = (NoticeType)Enum.Parse(typeof(NoticeType), "Notice");
        }

二、获取描述信息

 		[Description("会员等级")]
        enum MemberLevel
        {
            [Description("金牌会员")]
            gold = 1,
            [Description("银牌会员")]
            silver = 2,
            [Description("铜牌会员")]
            copper = 3
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="value">枚举值</param>
        /// <param name="isTop">是否是顶级标题的描述信息</param>
        /// <returns></returns>
        public static string GetDescription(this Enum value, bool isTop = false)
        {

            Type enumType = value.GetType();
            DescriptionAttribute attr = null;
            if (isTop)
            {
                attr = (DescriptionAttribute)Attribute.GetCustomAttribute(enumType, typeof(DescriptionAttribute));
            }
            else
            {
                // 获取枚举常数名称。
                string name = Enum.GetName(enumType, value);
                if (name != null)
                {
                    // 获取枚举字段。
                    FieldInfo fieldInfo = enumType.GetField(name);
                    if (fieldInfo != null)
                    {
                        // 获取描述的属性。
                        attr = Attribute.GetCustomAttribute(fieldInfo, typeof(DescriptionAttribute), false) as DescriptionAttribute;
                    }
                }
            }

            if (attr != null && !string.IsNullOrEmpty(attr.Description))
                return attr.Description;
            else
                return string.Empty;
        }

调用

     		MemberLevel gold = MemberLevel.gold;
            Console.WriteLine(gold.GetDescription());
            System.Console.Read();

标签：attr,NoticeType,C#,DescriptionAttribute,案例,枚举,string,Description
来源： https://www.cnblogs.com/wml-it/p/15763922.html