c#中自定义注解

来源：互联网发布：宋慧乔的相貌知乎编辑：程序博客网时间：2024/05/07 14:05

代码：

public enum TestEmun
{

        [Remark("AAA")]
        aaa,
        [Remark("BBB")]
        bbb,
        [Remark("CCC")]
        ccc
    }

    public class RemarkAttribute : Attribute
    {
        private string m_remark;

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="remark"></param>
        public RemarkAttribute(string remark)
        {
            this.m_remark = remark;
        }

        /// <summary>
        /// 属性
        /// </summary>
        public string Remark
        {
            get { return m_remark; }
            set { m_remark = value; }
        }

        /// <summary>
        /// 获取枚举的备注信息
        /// </summary>
        /// <param name="val">枚举值</param>
        /// <returns></returns>
        public static string GetEnumRemark(Enum val)
        {
            Type type = val.GetType();
            FieldInfo fd = type.GetField(val.ToString());
            if (fd == null)
                return string.Empty;
            object[] attrs = fd.GetCustomAttributes(typeof(RemarkAttribute), false);
            string name = string.Empty;
            foreach (RemarkAttribute attr in attrs)
            {
                name = attr.Remark;
            }
            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 GetRemark(this Enum val)
        {
            Type type = val.GetType();
            FieldInfo fd = type.GetField(val.ToString());
            if (fd == null)
                return string.Empty;
            object[] attrs = fd.GetCustomAttributes(typeof(RemarkAttribute), false);
            string name = string.Empty;
            foreach (RemarkAttribute attr in attrs)
            {
                name = attr.Remark;
            }
            return name;
        }

}

注意：定义的枚举类一定要继承自attribute类，

不知道下面该写什么了，不写了。。。。。。