[C#]EnumHelper

using System;using System.ComponentModel;using System.Reflection;namespace LH.DotNet2.Utilities.Common{    /// <summary>    /// 枚举帮助类    /// </summary>    public static class EnumHelper    {        #region 私有方法        PRivate static DescriptionAttribute[] GetDescriptAttr(this FieldInfo fieldInfo)        {            if (fieldInfo != null)            {                return (DescriptionAttribute[])fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);            }            return null;        }        #endregion 私有方法        /// <summary>        ///判断枚举是否包括枚举常数名称        /// </summary>        /// <typeparam name="T">枚举</typeparam>        /// <param name="enumName">枚举常数名称</param>        /// <returns>是否包括枚举常数名称</returns>        /// 创建  人:言志伟        /// 创建时间:2015-06-04 17:17        /// 备注说明:<c>null</c>        public static bool CheckedContainEnumName<T>(string enumName) where T : struct, IConvertible        {            bool _result = false;            if (typeof(T).IsEnum)            {                string[] _enumnName = Enum.GetNames(typeof(T));                if (_enumnName != null)                {                    for (int i = 0; i < _enumnName.Length; i++)                    {                        if (string.Compare(_enumnName[i], enumName, true) == 0)                        {                            _result = true;                            break;                        }                    }                }            }            return _result;        }        /// <summary>        /// 从枚举中获取Description        /// </summary>        /// <param name="targetEnum">需要获取枚举描述的枚举</param>        /// <returns>描述内容</returns>        public static string GetDescription(this Enum targetEnum)        {            string _description = string.Empty;            FieldInfo _fieldInfo = targetEnum.GetType().GetField(targetEnum.ToString());            DescriptionAttribute[] _attributes = _fieldInfo.GetDescriptAttr();            if (_attributes != null && _attributes.Length > 0)                _description = _attributes[0].Description;            else                _description = targetEnum.ToString();            return _description;        }        /// <summary>        /// 根据Description获取枚举        /// </summary>        /// <typeparam name="T">枚举类型</typeparam>        /// <param name="description">枚举描述</param>        /// <returns>枚举</returns>        public static T ParseEnumDescription<T>(this string description, T defaultValue) where T : struct, IConvertible        {            if (typeof(T).IsEnum)            {                Type _type = typeof(T);                foreach (FieldInfo field in _type.GetFields())                {                    DescriptionAttribute[] _description = field.GetDescriptAttr();                    if (_description != null && _description.Length > 0)                    {                        if (string.Compare(_description[0].Description, description, true) == 0)                        {                            defaultValue = (T)field.GetValue(null);                            break;                        }                    }                    else                    {                        if (string.Compare(field.Name, description, true) == 0)                        {                            defaultValue = (T)field.GetValue(null);                            break;                        }                    }                }            }            return defaultValue;        }        /// <summary>        /// 将枚举常数名称转换成枚举        /// </summary>        /// <typeparam name="T">枚举</typeparam>        /// <param name="enumName">枚举常数名称</param>        /// <returns></returns>        /// 创建  人:言志伟        /// 创建时间:2015-06-05 9:16        /// 备注说明:<c>null</c>        public static T ParseEnumName<T>(this string enumName) where T : struct, IConvertible        {            return (T)Enum.Parse(typeof(T), enumName, true);        }    }}

单元测试:

using Microsoft.VisualStudio.TestTools.UnitTesting;namespace YanZhiwei.DotNet2.Utilities.Common.Tests{    public enum AreaMode    {        NONE,        CITY,        TOWN,        ROAD,        CITYTOWN,        TOWNROAD,        CITYROAD,        ALL    }    [TestClass()]    public class EnumHelperTests    {        [TestMethod()]        public void CheckedContainEnumNameTest()        {            Assert.IsTrue(EnumHelper.CheckedContainEnumName<AreaMode>("none"));        }        [TestMethod()]        public void GetDescriptionTest()        {            Assert.AreEqual("NONE", AreaMode.NONE.GetDescription());        }        [TestMethod()]        public void ParseEnumDescriptionTest()        {            Assert.AreEqual(AreaMode.NONE, EnumHelper.ParseEnumDescription<AreaMode>("NONE", AreaMode.CITYTOWN));        }        [TestMethod()]        public void ParseEnumNameTest()        {            Assert.AreEqual(AreaMode.ALL, EnumHelper.ParseEnumName<AreaMode>("ALL"));        }    }}