C# EnumHelper
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using System; using System.Collections.Generic; using System.ComponentModel; using System.Reflection; namespace Utils { /// <summary> /// 枚举帮助类 /// </summary> public class EnumHelper { /// <summary> /// 返回枚举值的描述信息。 /// </summary> /// <param name="value">要获取描述信息的枚举值。</param> /// <returns>枚举值的描述信息。</returns> public static string GetEnumDesc<T>(int value) { Type enumType = typeof(T); DescriptionAttribute attr = null; // 获取枚举常数名称。 string name = Enum.GetName(enumType, value); if (name != null) { // 获取枚举字段。 FieldInfo fieldInfo = enumType.GetField(name); if (fieldInfo != null) { // 获取描述的属性。 attr = Attribute.GetCustomAttribute(fieldInfo, typeof(DescriptionAttribute), false) as DescriptionAttribute; } } // 返回结果 if (attr != null && !string.IsNullOrEmpty(attr.Description)) return attr.Description; else return string.Empty; } /// <summary> /// 返回枚举项的描述信息。 /// </summary> /// <param name="e">要获取描述信息的枚举项。</param> /// <returns>枚举项的描述信息。</returns> public static string GetEnumDesc(Enum e) { if (e == null) { return string.Empty; } Type enumType = e.GetType(); DescriptionAttribute attr = null; // 获取枚举字段。 FieldInfo fieldInfo = enumType.GetField(e.ToString()); if (fieldInfo != null) { // 获取描述的属性。 attr = Attribute.GetCustomAttribute(fieldInfo, typeof(DescriptionAttribute), false) as DescriptionAttribute; } // 返回结果 if (attr != null && !string.IsNullOrEmpty(attr.Description)) return attr.Description; else return string.Empty; } /// <summary> /// 获取枚举描述列表,并转化为键值对 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="isHasAll">是否包含“全部”</param> /// <param name="filterItem">过滤项</param> /// <returns></returns> public static List<EnumKeyValue> EnumDescToList<T>(bool isHasAll, params string[] filterItem) { List<EnumKeyValue> list = new List<EnumKeyValue>(); // 如果包含全部则添加 if (isHasAll) { list.Add(new EnumKeyValue() { Key = 0, Name = "全部" }); } #region 方式一 foreach (var item in typeof(T).GetFields()) { // 获取描述 var attr = item.GetCustomAttribute(typeof(DescriptionAttribute), true) as DescriptionAttribute; if (attr != null && !string.IsNullOrEmpty(attr.Description)) { // 跳过过滤项 if (Array.IndexOf<string>(filterItem, attr.Description) != -1) { continue; } // 添加 EnumKeyValue model = new EnumKeyValue(); model.Key = (int)Enum.Parse(typeof(T), item.Name); model.Name = attr.Description; list.Add(model); } } #endregion #region 方式二 //foreach (int item in Enum.GetValues(typeof(T))) //{ // // 获取描述 // FieldInfo fi = typeof(T).GetField(Enum.GetName(typeof(T), item)); // var attr = fi.GetCustomAttribute(typeof(DescriptionAttribute), false) as DescriptionAttribute; // if (attr != null && !string.IsNullOrEmpty(attr.Description)) // { // // 跳过过滤项 // if (Array.IndexOf<string>(filterItem, attr.Description) != -1) // { // continue; // } // // 添加 // EnumKeyValue model = new EnumKeyValue(); // model.Key = item; // model.Name = attr.Description; // list.Add(model); // } //} #endregion return list; } /// <summary> /// 获取枚举值列表,并转化为键值对 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="isHasAll">是否包含“全部”</param> /// <param name="filterItem">过滤项</param> /// <returns></returns> public static List<EnumKeyValue> EnumToList<T>(bool isHasAll, params string[] filterItem) { List<EnumKeyValue> list = new List<EnumKeyValue>(); // 如果包含全部则添加 if (isHasAll) { list.Add(new EnumKeyValue() { Key = 0, Name = "全部" }); } foreach (int item in Enum.GetValues(typeof(T))) { string name = Enum.GetName(typeof(T), item); // 跳过过滤项 if (Array.IndexOf<string>(filterItem, name) != -1) { continue; } // 添加 EnumKeyValue model = new EnumKeyValue(); model.Key = item; model.Name = name; list.Add(model); } return list; } } /// <summary> /// 枚举键值对 /// </summary> public class EnumKeyValue { public int Key { get; set; } public string Name { get; set; } } }