如何获取枚举的描述信息

方法一：   使用[Display(Name="描述")]特性　　

public namespace My.Test.Application
{

    /// <summary>
    /// 定义枚举
    /// </summary>
    public enum ExpendRecordStatusEnum
    {

        /// <summary>
        /// 正常销售
        /// </summary>
        [Display(Name = "正常销售")]
        NormalSale = 4,

        /// <summary>
        /// 退换
        /// </summary>
        [Display(Name = "退换单据")]
        Replacement = 5

    }

    /// <summary>
    /// 枚举帮助
    /// </summary>
    public static class EnumHelper
    {

        /// <summary>
        /// 获得枚举量的Display[name=""]特性
        /// </summary>
        /// <param name="eum"></param>
        /// <returns></returns>
        public static string GetDisplayName(this System.Enum eum)
        {
            var type = eum.GetType(); //先获取这个枚举的类型
            var field = type.GetField(eum.ToString()); //通过这个类型获取到值
            var obj = (DisplayAttribute)field.GetCustomAttribute(typeof(DisplayAttribute)); //得到特性
            return obj.Name ?? "";
        }


    }

    /// <summary>
    /// 枚举测试类
    /// </summary>
    public class TestEnum
    {

        /// <summary>
        /// 获取到字典描述值
        /// </summary>
        /// <returns></returns>
        public string SearchEnumDisplayName()
        {
            return ExpendRecordStatusEnum.NormalSale.GetDisplayName();
        }
    }


}

方法二:   使用[DisplayName("描述")]特性

注意：在netcore 3.1中无法使用DisplayName特性

public namespace My.Test.Application
{

    /// <summary>
    /// 定义枚举
    /// </summary>
    public enum ExpendRecordStatusEnum
    {

        /// <summary>
        /// 正常销售
        /// </summary>
        [DisplayName("正常销售")]
        NormalSale = 4,

        /// <summary>
        /// 退换
        /// </summary>
        [DisplayName("退换单据")]
        Replacement = 5

    }

    /// <summary>
    /// 枚举帮助
    /// </summary>
    public static class EnumHelper
    {

        /// <summary>
        /// 获得枚举量的DisplayName特性
        /// </summary>
        /// <param name="eum"></param>
        /// <returns></returns>
        public static string GetDisplayName(this System.Enum eum)
        {
            var type = eum.GetType(); //先获取这个枚举的类型
            var field = type.GetField(eum.ToString()); //通过这个类型获取到值
            var obj = (DisplayNameAttribute)field.GetCustomAttribute(typeof(DisplayNameAttribute)); //得到特性
            return obj.DisplayName ?? "";
        }


    }

    /// <summary>
    /// 枚举测试类
    /// </summary>
    public class TestEnum
    {

        /// <summary>
        /// 获取到字典描述值
        /// </summary>
        /// <returns></returns>
        public string SearchEnumDisplayName()
        {
            return ExpendRecordStatusEnum.NormalSale.GetDisplayName();
        }
    }


}