public static class EnumHelper{#region get/// <summary>///  获得枚举类型所包含的全部项的列表/// </summary>/// <param name="enumType">枚举的类型</param>/// <returns></returns>public static List<EnumItem> GetEnumItems(Type enumType){return GetEnumItems(enumType, false);}/// <summary>/// 获得枚举类型所包含的全部项的列表，包含"All"。/// </summary>/// <param name="enumType">枚举对象类型</param>/// <returns></returns>public static List<EnumItem> GetEnumItemsWithAll(Type enumType){return GetEnumItems(enumType, true);}/// <summary>/// 获得枚举类型所包含的全部项的列表/// </summary>/// <param name="enumType">枚举对象类型</param>/// <param name="withAll">是否需要包含'All'</param>/// <returns></returns>public static List<EnumItem> GetEnumItems(Type enumType, bool withAll){List<EnumItem> list = new List<EnumItem>();if (enumType.IsEnum != true){//whether the type is enum typethrow new InvalidOperationException();}if (withAll == true)list.Add(new EnumItem(-1, "All"));// 获得特性Description的类型信息Type typeDescription = typeof(DescriptionAttribute);// 获得枚举的字段信息（因为枚举的值实际上是一个static的字段的值）System.Reflection.FieldInfo[] fields = enumType.GetFields();// 检索所有字段foreach (FieldInfo field in fields){// 过滤掉一个不是枚举值的，记录的是枚举的源类型if (field.FieldType.IsEnum == false)continue;// 通过字段的名字得到枚举的值int value = (int)enumType.InvokeMember(field.Name, BindingFlags.GetField, null, null, null);string text = string.Empty;// 获得这个字段的所有自定义特性，这里只查找Description特性object[] arr = field.GetCustomAttributes(typeDescription, true);if (arr.Length > 0){// 因为Description自定义特性不允许重复，所以只取第一个DescriptionAttribute aa = (DescriptionAttribute)arr[0];// 获得特性的描述值text = aa.Description;}else{// 如果没有特性描述，那么就显示英文的字段名text = field.Name;}list.Add(new EnumItem(value, text));}return list;}/// <summary>/// the the enum value's descrption attribute information/// </summary>/// <param name="enumType">the type of the enum</param>/// <param name="value">the enum value</param>/// <returns></returns>public static string GetDescriptionByEnum<T>(T t){if (t == null){return null;}Type enumType = typeof(T);List<EnumItem> list = GetEnumItems(enumType);foreach (EnumItem item in list){if (Convert.ToInt32(item.Key) == Convert.ToInt32(t))return item.Value.ToString();}return string.Empty;}public static string GetDescriptionByEnum(object t){if (t == null){return string.Empty;}Type enumType = t.GetType();List<EnumItem> list = GetEnumItems(enumType);foreach (EnumItem item in list){if (Convert.ToInt32(item.Key) == Convert.ToInt32(t))return item.Value.ToString();}return string.Empty;}/// <summary>/// get the enum value's int mode value/// </summary>/// <param name="enumType">the type of the enum</param>/// <param name="value">the enum value's descrption</param>/// <returns></returns>public static int GetValueByDescription<T>(string description){Type enumType = typeof(T);List<EnumItem> list = GetEnumItems(enumType);foreach (EnumItem item in list){if (item.Value.ToString().ToLower() == description.Trim().ToLower())return Convert.ToInt32(item.Key);}return -1;}/// <summary>/// get the Enum value according to the its decription/// </summary>/// <param name="enumType">the type of the enum</param>/// <param name="value">the description of the EnumValue</param>/// <returns></returns>public static T GetEnumByDescription<T>(string description){if (description == null){return default(T);}Type enumType = typeof(T);List<EnumItem> list = GetEnumItems(enumType);foreach (EnumItem item in list){if (item.Value.ToString().ToLower() == description.Trim().ToLower())return (T)item.Key;}return default(T);}/// <summary>/// get the description attribute of a Enum value/// </summary>/// <param name="enumType">the type of the enum</param>/// <param name="value">enum value name</param>/// <returns></returns>public static T GetEnumByName<T>(string name){Type enumType = typeof(T);List<EnumItem> list = GetEnumItems(enumType);bool flag = false;foreach (EnumItem item in list){if (item.Value.ToString().ToLower() == name.Trim().ToLower()){flag = true;return (T)item.Key;}}if (!flag){throw new ArgumentException("Can not found specify the name of the enum", "name");}return default(T);}public static T GetEnumByValue<T>(object value){bool flag = false;if (value == null)throw new ArgumentNullException("value");try{Type enumType = typeof(T);List<EnumItem> list = GetEnumItems(enumType);foreach (EnumItem item in list){if (item.Key.ToString().Trim().ToLower() == value.ToString().Trim().ToLower()){flag = true;return (T)item.Key;}}if (!flag){throw new ArgumentException("Can not found specify the value of the enum", "value");} return default(T);}catch{return default(T);}}public static int? GetValueByEnum(object value){if (value == null)return null;try{return (int)value;}catch{return null;}}#endregion #region Parse Enum/// <summary>/// 提供Value的字符,转换为对应的枚举对象/// <remarks>适用于枚举对象值定义为Char类型的</remarks>/// </summary>/// <typeparam name="T"></typeparam>/// <param name="c"></param>/// <returns></returns>public static T Parse<T>(char c) where T : struct{return Parse<T>((ulong)c);}/// <summary>/// 提供Value的字符,转换为对应的枚举对象/// <remarks>适用于枚举对象值定义为Int类型的</remarks>/// </summary>/// <typeparam name="T"></typeparam>/// <param name="l"></param>/// <returns></returns>public static T Parse<T>(ulong l) where T : struct{if (!typeof(T).IsEnum){throw new ArgumentException("Need System.Enum as generic type!");}object o = Enum.Parse(typeof(T), l.ToString());if (Enum.IsDefined(typeof(T), o)){return (T)o;}throw new InvalidCastException();}/// <summary>/// 提供Value的字符,转换为对应的枚举对象/// <remarks>适用于枚举对象值定义为Char类型的</remarks>/// </summary>/// <typeparam name="T"></typeparam>/// <param name="value"></param>/// <returns></returns>public static T Parse<T>(string value) where T : struct{if (value == null || value.Trim().Length != 1){throw new ArgumentException("Invalid cast,value must be one character!");}return Parse<T>(value[0]);}/// <summary>/// /// </summary>/// <typeparam name="T"></typeparam>/// <param name="c"></param>/// <param name="result"></param>/// <returns></returns>public static bool TryParse<T>(char c, out T result) where T : struct{return TryParse<T>((ulong)c, out result);}/// <summary>/// /// </summary>/// <typeparam name="T"></typeparam>/// <param name="value"></param>/// <param name="result"></param>/// <returns></returns>public static bool TryParse<T>(string value, out T result) where T : struct{try{if (value == null || value.Trim().Length != 1){throw new ArgumentException("Invalid cast,value must be one character!");}return TryParse<T>(value[0], out result);}catch{result = default(T);return false;}}/// <summary>/// /// </summary>/// <typeparam name="T"></typeparam>/// <param name="value"></param>/// <param name="result"></param>/// <returns></returns>public static bool TryParse<T>(ulong value, out T result) where T : struct{try{result = Parse<T>(value);return true;}catch{result = default(T);return false;}}#endregion}public class EnumItem{private object m_key;private object m_value;public object Key{get { return m_key; }set { m_key = value; }}public object Value{get { return m_value; }set { m_value = value; }}public EnumItem(object _key, object _value){m_key = _key;m_value = _value;}}