C# .NET 获取枚举值的自定义属性

一、定义一个类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Reflection;
namespace XXX.XXX.Utils

{

    /// <summary>

    /// 备注特性

    /// </summary>

    public class DescAttribute : Attribute

    {

        private string m_desc;

        public DescAttribute(string desc)

        {

            this.m_desc = desc;

        }

        /// <summary>

        /// 备注

        /// </summary>

        public string Desc

        {

            get { return m_desc; }

            set { m_desc = value; }

        }

        /// <summary>

        /// 获取枚举的备注信息

        /// </summary>

        /// <param name="val">枚举值</param>

        /// <returns></returns>

        public static string GetEnumDesc(Enum val)

        {

            Type type = val.GetType();

            FieldInfo fd = type.GetField(val.ToString());

            if (fd == null)

                return string.Empty;

            object[] attrs = fd.GetCustomAttributes(typeof(DescAttribute), false);

            string name = string.Empty;

            foreach (DescAttribute attr in attrs)

            {

                name = attr.Desc;

            }

            return name;

        }

    }

    /// <summary>

    /// 枚举扩展类

    /// </summary>

    public static class EnumExtension

    {

        /// <summary>

        /// 获取枚举的备注信息

        /// </summary>

        /// <param name="em"></param>

        /// <returns></returns>

        public static string GetDesc(this Enum em)

        {

            Type type = em.GetType();

            FieldInfo fd = type.GetField(em.ToString());

            if (fd == null)

                return string.Empty;

            object[] attrs = fd.GetCustomAttributes(typeof(DescAttribute), false);

            string name = string.Empty;

            foreach (DescAttribute attr in attrs)

            {

                name = attr.Desc;

            }

            return name;

        }

    }

}

二、定义一个枚举，并引用如上命名空间

public enum EnumCalculationTag

{

        [Desc("This is description")]

        A

}

三、获取注解（需引用“一”中的命名空间）

EnumCalculationTag.A.GetDesc()