144 lines
4.4 KiB
C#
144 lines
4.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace OrpaonEMS.App.Com
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{
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public static class EnumExtension
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{
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#region 获取枚举描述内容
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public static Attribute GetEnumAttribute(this Enum value, Type attribute)
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{
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var enumType = value.GetType();
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var name = Enum.GetName(enumType, value);
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if (name != null)
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{
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// 获取枚举字段。
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var fieldInfo = enumType.GetField(name);
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if (fieldInfo != null)
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{
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// 获取描述的属性。
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var attr = Attribute.GetCustomAttribute(fieldInfo,
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attribute, false);
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return attr;
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}
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}
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return null;
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}
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public static T GetEnumAttribute<T>(this Enum value)
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{
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var enumType = value.GetType();
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var name = Enum.GetName(enumType, value);
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if (name != null)
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{
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// 获取枚举字段。
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var fieldInfo = enumType.GetField(name);
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if (fieldInfo != null)
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{
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// 获取描述的属性。
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var attr = Attribute.GetCustomAttribute(fieldInfo, typeof(T), false);
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return (T)(object)attr;
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}
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}
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return default(T);
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}
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/// <summary>
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/// 获取枚举描述内容;
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/// </summary>
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/// <param name="value"></param>
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/// <param name="defaultval"></param>
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/// <returns></returns>
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public static string GetEnumDescription(this Enum value, string defaultval = "")
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{
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var attr = GetEnumAttribute(value, typeof(DescriptionAttribute));
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return (attr as DescriptionAttribute)?.Description ?? defaultval;
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}
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#endregion
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#region 获取枚举列表
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/// <summary>
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/// 通过枚举对象获取枚举列表
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="value"></param>
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/// <returns></returns>
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public static List<T> GetEnumList<T>(this T value)
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{
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var list = new List<T>();
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if (value is Enum)
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{
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var valData = Convert.ToInt32((T)Enum.Parse(typeof(T), value.ToString()));
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var tps = Enum.GetValues(typeof(T));
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list.AddRange(from object tp in tps where ((int)Convert.ToInt32((T)Enum.Parse(typeof(T), tp.ToString())) & valData) == valData select (T)tp);
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}
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return list;
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}
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/* 参考：https://www.codenong.com/17123548/ */
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/// <summary>
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/// 通过枚举类型获取枚举列表;
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="value"></param>
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/// <returns></returns>
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public static List<T> GetEnumList<T>() where T : Enum
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{
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List<T> list = Enum.GetValues(typeof(T)).OfType<T>().ToList();
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return list;
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}
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/* 参考：https://www.codenong.com/105372/ */
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/// <summary>
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/// Gets all items for an enum value.（通过枚举对象获取所有枚举）
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="value">The value.</param>
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/// <returns></returns>
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public static IEnumerable<T> GetAllItems<T>(this Enum value)
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{
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foreach (object item in Enum.GetValues(typeof(T)))
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{
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yield return (T)item;
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}
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}
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/// <summary>
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/// Gets all items for an enum type.（通过枚举类型获取所有枚举）
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <returns></returns>
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public static IEnumerable<T> GetAllItems<T>() where T : struct
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{
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foreach (object item in Enum.GetValues(typeof(T)))
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{
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yield return (T)item;
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}
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}
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#endregion
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/// <summary>
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/// 将枚举转换为值
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="value"></param>
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/// <returns></returns>
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public static T ToValue<T>(this Enum value) where T : struct
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{
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return (T)(object)value;
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}
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}
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}
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