<span style="font-size:14px;">using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Reflection; using System.ComponentModel; using System.Collections; using System.Collections.Specialized; namespace JianKunKing.Common.EnumClass { /// <summary> /// 枚举操作类 /// </summary> public static class EnumOperation { #region 从枚举中获取Description /// <summary> /// 从枚举中获取Description /// </summary> /// <param name="enumName">需要获取枚举描述的枚举</param> /// <returns>描述内容</returns> public static string GetDescription(Enum enumName) { try { string _description = string.Empty; FieldInfo _fieldInfo = enumName.GetType().GetField(enumName.ToString()); DescriptionAttribute[] _attributes = GetDescriptAttr(_fieldInfo); if (_attributes != null && _attributes.Length > 0) { _description = _attributes[0].Description; } else { _description = enumName.ToString(); } return _description; } catch (Exception) { throw; } } #endregion #region 获取字段Description(private) /// <summary> /// 获取字段Description /// </summary> /// <param name="fieldInfo">FieldInfo</param> /// <returns>DescriptionAttribute[] </returns> private static DescriptionAttribute[] GetDescriptAttr(this FieldInfo fieldInfo) { try { if (fieldInfo != null) { return (DescriptionAttribute[])fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false); } return null; } catch (Exception) { throw; } } #endregion #region 根据Description获取枚举定义字符串 /// <summary> /// 根据Description获取枚举定义字符串 /// </summary> /// <typeparam name="T">枚举类型</typeparam> /// <param name="description">枚举描述</param> /// <returns>枚举</returns> public static T GetEnumName<T>(string description) { Type _type = typeof(T); foreach (FieldInfo field in _type.GetFields()) { DescriptionAttribute[] _curDesc = field.GetDescriptAttr(); if (_curDesc != null && _curDesc.Length > 0) { if (_curDesc[0].Description == description) { return (T)field.GetValue(null); } } else { if (field.Name == description) { return (T)field.GetValue(null); } } } throw new ArgumentException(string.Format("{0} 未能找到对应的枚举.", description), "Description"); } #endregion #region 将枚举转换为ArrayList /// <summary> /// 将枚举转换为ArrayList /// 说明: /// 若不是枚举类型,则返回NULL /// </summary> /// <param name="type">枚举类型</param> /// <returns>ArrayList</returns> public static ArrayList ToArrayList(Type type) { try { if (type.IsEnum) { ArrayList _array = new ArrayList(); Array _enumValues = Enum.GetValues(type); foreach (Enum value in _enumValues) { _array.Add(new KeyValuePair<Enum, string>(value, GetDescription(value))); } return _array; } return null; } catch (Exception) { throw; } } #endregion #region 根据枚举值得到属性Description中的描述, 如果没有定义此属性则返回空串 /// <summary> /// 根据枚举值得到属性Description中的描述, 如果没有定义此属性则返回空串 /// </summary> /// <param name="value"></param> /// <param name="enumType"></param> /// <returns></returns> public static String GetEnumDescriptionString(int value, Type enumType) { try { NameValueCollection nvc = GetNVCFromEnumValue(enumType); return nvc[value.ToString()]; } catch (Exception) { throw; } } #endregion #region 根据枚举类型得到其所有的值 与 枚举定义Description属性 的集合 /// <summary> /// 根据枚举类型得到其所有的 值 与 枚举定义Description属性 的集合 /// </summary> /// <param name="enumType"></param> /// <returns></returns> public static NameValueCollection GetNVCFromEnumValue(Type enumType) { try { NameValueCollection nvc = new NameValueCollection(); Type typeDescription = typeof(DescriptionAttribute); System.Reflection.FieldInfo[] fields = enumType.GetFields(); string strText = string.Empty; string strValue = string.Empty; foreach (FieldInfo field in fields) { if (field.FieldType.IsEnum) { strValue = ((int)enumType.InvokeMember(field.Name, BindingFlags.GetField, null, null, null)).ToString(); object[] arr = field.GetCustomAttributes(typeDescription, true); if (arr.Length > 0) { DescriptionAttribute aa = (DescriptionAttribute)arr[0]; strText = aa.Description; } else { strText = ""; } nvc.Add(strValue, strText); } } return nvc; } catch (Exception) { throw; } } #endregion #region 根据枚举值得到相应的枚举定义字符串 /// <summary> ///根据枚举值得到相应的枚举定义字符串 /// </summary> /// <param name="value"></param> /// <param name="enumType"></param> /// <returns></returns> public static String GetEnumString(int value, Type enumType) { try { NameValueCollection nvc = GetEnumStringFromEnumValue(enumType); return nvc[value.ToString()]; } catch (Exception) { throw; } } #endregion #region 根据枚举类型得到其所有的 值 与 枚举定义字符串 的集合 /// <summary> /// 根据枚举类型得到其所有的 值 与 枚举定义字符串 的集合 /// </summary> /// <param name="enumType"></param> /// <returns></returns> public static NameValueCollection GetEnumStringFromEnumValue(Type enumType) { try { NameValueCollection nvc = new NameValueCollection(); Type typeDescription = typeof(DescriptionAttribute); System.Reflection.FieldInfo[] fields = enumType.GetFields(); string strText = string.Empty; string strValue = string.Empty; foreach (FieldInfo field in fields) { if (field.FieldType.IsEnum) { strValue = ((int)enumType.InvokeMember(field.Name, BindingFlags.GetField, null, null, null)).ToString(); nvc.Add(strValue, field.Name); } } return nvc; } catch (Exception) { throw; } } #endregion } }</span>
If you know that the enumeration number is the int type number, you can get the name and cast it directly (enumeration type) (int value)
Small note :
For basic public method classes, it is best not to get exceptions and throw them directly. Remember not to swallow or only throw out part of the information.
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