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

namespace EShang.Common
{
    /// <summary>
    /// 描述特性的读取
    /// </summary>
    public static class DescriptionHelper
    {
        /// <summary>
        /// 获取枚举的描述
        /// </summary>
        /// <param name="em"></param>
        /// <returns></returns>
        public static string GetEnumDescription(this Enum em)
        {
            Type type = em.GetType();
            var name = Enum.GetName(type, em);
            if (name == null)
                return "";
            var field = type.GetField(name);
            if (field == null)
                return "";
            if (!(Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute)) is DescriptionAttribute attribute))
            {
                return name;
            }
            return attribute.Description;
        }
    }
}