获取枚举类型的描述description

Posted 2020-08-19 牛腩的编程不归路

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;


namespace candel
{
    class Program
    {
        static void Main(string[] args)
        {
            int x = (int)OrderType.WaitConfirm;
            string str = Util.GetEnumDesc(typeof(OrderType), x);
            Console.WriteLine(str);


            Order o = new Order() { Id = 1, Type = (int)OrderType.Complete };
            string str2 = (typeof(OrderType)).GetEnumDesc(o.Type);
            Console.WriteLine(str2);


            Console.Read();
        }




    }


    public class Order
    {
        public int Id { set; get; }
        public int Type { set; get; }
    }




    public enum OrderType
    {
        /// <summary>
        /// 等待用户付款
        /// </summary>
        [Description("等待用户付款")]
        WaitPay = 0,
        /// <summary>
        /// 等待商家发货
        /// </summary>
        [Description("等待商家发货")]
        WaitSend = 1,
        /// <summary>
        /// 等待用户确认收货
        /// </summary>
        [Description("等待用户确认收货")]
        WaitConfirm = 2,
        /// <summary>
        /// 订单完成
        /// </summary>
        [Description("订单完成")]
        Complete = 3
    }




    public static class Util
    {
        /// <summary>
        /// 根据值得到中文备注
        /// </summary>
        /// <param name="e"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static String GetEnumDesc(this Type e, int? value)
        {
            FieldInfo[] fields = e.GetFields();
            for (int i = 1, count = fields.Length; i < count; i++)
            {
                if ((int)System.Enum.Parse(e, fields[i].Name) == value)
                {
                    DescriptionAttribute[] EnumAttributes = (DescriptionAttribute[])fields[i].
                GetCustomAttributes(typeof(DescriptionAttribute), false);
                    if (EnumAttributes.Length > 0)
                    {
                        return EnumAttributes[0].Description;
                    }
                }
            }
            return "";
        }
    }
}