枚举帮助类

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

namespace EnumHelper
{
    /// <summary>
    /// 枚举帮助类
    /// 1、获取枚举的描述文本
    /// 2、获取枚举名和描述信息的列表
    /// </summary>
    public static class EnumHelper
    {
        /// <summary>
        /// 获取枚举值的描述文本
        /// </summary>
        /// <param name="e">枚举值</param>
        /// <returns></returns>
        public static string Description(this System.Enum e)
        {
            Type enumType = e.GetType();
            var name = Enum.GetName(enumType, e);
            string des = GetDescription(enumType, name);
            return des;
        }

        /// <summary>
        /// 获取枚举名和描述信息的列表
        /// </summary>
        /// <typeparam name="T">枚举类型</typeparam>
        /// <param name="EnumType">类型</param>
        /// <returns>枚举名和描述信息键值对</returns>
        public static Dictionary<T, string> GetEnumAndDescription<T>(this Type EnumType) where T : struct
        {
            if (!EnumType.IsEnum)
                throw new ArgumentException("GetEnumValues: Type '" + EnumType.Name + "'不是枚举类型");

            Dictionary<T, string> dic = new Dictionary<T, string>();
            foreach (var item in Enum.GetNames(EnumType))
            {
                var _enum = (T)Enum.Parse(EnumType, item);
                var des = GetDescription(EnumType, item);
                dic.Add(_enum, des);
            }
            return dic;
        }

        /// <summary>
        /// 获取枚举名的描述文本
        /// </summary>
        /// <param name="enumType">类型</param>
        /// <param name="name">枚举名</param>
        /// <returns>描述文本</returns>
        private static string GetDescription(Type enumType, string name)
        {
            string des = string.Empty;
            var fieldInfo = enumType.GetFields().FirstOrDefault(a => a.Name == name);
            object[] obj = fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (obj.Length > 0)
            {
                des = ((DescriptionAttribute)obj[0]).Description;
            }
            return des;
        }
    }
}