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

namespace TempTask.WebEntry.Tools
{
    public class EnumHelper
    {
        /// <summary>
        /// 得到枚举的DescriptionAttribute值。
        /// </summary>
        /// <typeparam name="TEnum"></typeparam>
        /// <param name="value"></param>
        /// <returns></returns>
        static public string GetEnumDescription<TEnum>(object value)
        {
            Type enumType = typeof(TEnum);
            if (!enumType.IsEnum)
                throw new ArgumentException("不是枚举类型");
            var name = Enum.GetName(enumType, value);
            if (name == null)
                return string.Empty;
            object[] objs = enumType.GetField(name).GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (objs == null || objs.Length == 0)
                return string.Empty;
            DescriptionAttribute attr = objs[0] as DescriptionAttribute;
            return attr.Description;
        }
    }
}