如何獲取枚舉的描述信息

方法一：   使用[Display(Name="描述")]特性　　

public namespace My.Test.Application
{

    /// <summary>
    /// 定義枚舉
    /// </summary>
    public enum ExpendRecordStatusEnum
    {

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

        /// <summary>
        /// 退換
        /// </summary>
        [Display(Name = "退換單據")]
        Replacement = 5

    }

    /// <summary>
    /// 枚舉幫助
    /// </summary>
    public static class EnumHelper
    {

        /// <summary>
        /// 獲得枚舉量的Display[name=""]特性
        /// </summary>
        /// <param name="eum"></param>
        /// <returns></returns>
        public static string GetDisplayName(this System.Enum eum)
        {
            var type = eum.GetType(); //先獲取這個枚舉的類型
            var field = type.GetField(eum.ToString()); //通過這個類型獲取到值
            var obj = (DisplayAttribute)field.GetCustomAttribute(typeof(DisplayAttribute)); //得到特性
            return obj.Name ?? "";
        }


    }

    /// <summary>
    /// 枚舉測試類
    /// </summary>
    public class TestEnum
    {

        /// <summary>
        /// 獲取到字典描述值
        /// </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中無法使用DisplayName特性

 

public namespace My.Test.Application
{

    /// <summary>
    /// 定義枚舉
    /// </summary>
    public enum ExpendRecordStatusEnum
    {

        /// <summary>
        /// 正常銷售
        /// </summary>
        [DisplayName("正常銷售")]
        NormalSale = 4,

        /// <summary>
        /// 退換
        /// </summary>
        [DisplayName("退換單據")]
        Replacement = 5

    }

    /// <summary>
    /// 枚舉幫助
    /// </summary>
    public static class EnumHelper
    {

        /// <summary>
        /// 獲得枚舉量的DisplayName特性
        /// </summary>
        /// <param name="eum"></param>
        /// <returns></returns>
        public static string GetDisplayName(this System.Enum eum)
        {
            var type = eum.GetType(); //先獲取這個枚舉的類型
            var field = type.GetField(eum.ToString()); //通過這個類型獲取到值
            var obj = (DisplayNameAttribute)field.GetCustomAttribute(typeof(DisplayNameAttribute)); //得到特性
            return obj.DisplayName ?? "";
        }


    }

    /// <summary>
    /// 枚舉測試類
    /// </summary>
    public class TestEnum
    {

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


}