添加项目文件。
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using MAX.Core.Extensions;
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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.Reflection;
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namespace MAX.Core.Helpers;
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/// <summary>
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/// 枚举操作
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/// </summary>
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public static partial class EnumHelper
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{
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/// <summary>
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/// 获取实例
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/// </summary>
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/// <typeparam name="TEnum">枚举类型</typeparam>
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/// <param name="member">成员名或值,范例:Enum1枚举有成员A=0,则传入"A"或"0"获取 Enum1.A</param>
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public static TEnum Parse<TEnum>(object member)
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{
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string value = member.SafeString();
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if (string.IsNullOrWhiteSpace(value))
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{
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if (typeof(TEnum).IsGenericType)
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{
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return default;
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}
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throw new ArgumentNullException(nameof(member));
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}
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return (TEnum)Enum.Parse(Common.GetType<TEnum>(), value, true);
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}
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public static object Parse(Type enumObj, object member)
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{
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string value = member.SafeString();
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if (string.IsNullOrWhiteSpace(value))
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{
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if (enumObj.IsGenericType)
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{
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return null;
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}
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throw new ArgumentNullException(nameof(member));
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}
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return Enum.Parse(enumObj, value, true);
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}
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public static TEnum ParseByDescription<TEnum>(string description)
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{
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return (TEnum)ParseByDescription(Common.GetType<TEnum>(), description);
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}
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public static object ParseByDescription(Type enumObj, string description)
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{
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List<EnumItem> listitem = GetItems(enumObj);
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foreach (EnumItem item in listitem)
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{
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if (item.Description == description)
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{
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return Enum.Parse(enumObj, item.Numeric.ToString(), true);
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}
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}
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return null;
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}
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/// <summary>
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/// 获取成员名
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/// </summary>
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/// <typeparam name="TEnum">枚举类型</typeparam>
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/// <param name="member">成员名、值、实例均可,范例:Enum1枚举有成员A=0,则传入Enum1.A或0,获取成员名"A"</param>
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public static string GetName<TEnum>(object member)
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{
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return GetName(Common.GetType<TEnum>(), member);
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}
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/// <summary>
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/// 获取成员名
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/// </summary>
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/// <param name="type">枚举类型</param>
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/// <param name="member">成员名、值、实例均可</param>
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public static string GetName(Type type, object member)
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{
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if (type == null)
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{
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return string.Empty;
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}
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if (member == null)
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{
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return string.Empty;
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}
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if (member is string)
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{
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return member.ToString();
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}
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if (type.GetTypeInfo().IsEnum == false)
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{
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return string.Empty;
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}
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return Enum.GetName(type, member);
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}
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/// <summary>
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/// 获取成员值
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/// </summary>
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/// <typeparam name="TEnum">枚举类型</typeparam>
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/// <param name="member">成员名、值、实例均可，范例:Enum1枚举有成员A=0,可传入"A"、0、Enum1.A，获取值0</param>
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public static int GetValue<TEnum>(object member)
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{
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return GetValue(Common.GetType<TEnum>(), member);
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}
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/// <summary>
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/// 获取成员值
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/// </summary>
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/// <param name="type">枚举类型</param>
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/// <param name="member">成员名、值、实例均可</param>
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public static int GetValue(Type type, object member)
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{
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string value = member.SafeString();
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if (string.IsNullOrWhiteSpace(value))
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{
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throw new ArgumentNullException(nameof(member));
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}
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return (int)Enum.Parse(type, member.ToString(), true);
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}
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/// <summary>
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/// 获取描述,使用System.ComponentModel.Description特性设置描述
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/// </summary>
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/// <typeparam name="TEnum">枚举类型</typeparam>
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/// <param name="member">成员名、值、实例均可</param>
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public static string GetDescription<TEnum>(object member)
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{
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return ReflectionHelper.GetDescription<TEnum>(GetName<TEnum>(member));
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}
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/// <summary>
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/// 获取描述,使用System.ComponentModel.Description特性设置描述
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/// </summary>
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/// <param name="type">枚举类型</param>
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/// <param name="member">成员名、值、实例均可</param>
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public static string GetDescription(Type type, object member)
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{
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return ReflectionHelper.GetDescription(type, GetName(type, member));
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}
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/// <summary>
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/// 获取项集合,文本设置为Description，值为Value
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/// </summary>
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/// <typeparam name="TEnum">枚举类型</typeparam>
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public static List<EnumItem> GetItems<TEnum>()
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{
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return GetItems(typeof(TEnum));
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}
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/// <summary>
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/// 获取项集合,文本设置为Description，值为Value
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/// </summary>
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/// <param name="type">枚举类型</param>
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public static List<EnumItem> GetItems(Type type)
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{
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type = Common.GetType(type);
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if (type.IsEnum == false)
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{
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throw new InvalidOperationException($"类型 {type} 不是枚举");
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}
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List<EnumItem> result = [];
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foreach (FieldInfo field in type.GetFields())
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{
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AddItem(type, result, field);
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}
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return result.OrderBy(t => t.Numeric).ToList();
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}
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public static CommonItem GetItem(object obj)
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{
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CommonItem item = null;
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if (obj is Enum em)
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{
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//item.Text = em.get
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string text = em.ToString();
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int value = GetValue(obj.GetType(), obj);
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string description = em.ToDescription();
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item = new CommonItem(text, value, des: description);
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}
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return item;
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}
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/// <summary>
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/// 添加描述项
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/// </summary>
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private static void AddItem(Type type, ICollection<EnumItem> result, FieldInfo field)
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{
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if (!field.FieldType.IsEnum)
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{
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return;
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}
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string text = field.Name;
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int value = GetValue(type, field.Name);
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string description = ReflectionHelper.GetDescription(field);
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result.Add(new EnumItem(text, value, description));
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}
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/// <summary>
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/// 获取名称集合
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/// </summary>
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/// <typeparam name="TEnum">枚举类型</typeparam>
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public static List<string> GetNames<TEnum>()
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{
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return GetNames(typeof(TEnum));
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}
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/// <summary>
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/// 获取名称集合
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/// </summary>
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/// <param name="type">枚举类型</param>
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public static List<string> GetNames(Type type)
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{
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type = Common.GetType(type);
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if (type.IsEnum == false)
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{
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throw new InvalidOperationException($"类型 {type} 不是枚举");
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}
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List<string> result = [];
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foreach (FieldInfo field in type.GetFields())
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{
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if (!field.FieldType.IsEnum)
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{
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continue;
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}
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result.Add(field.Name);
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}
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return result;
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}
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/// <summary>
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/// 获取名称集合
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/// </summary>
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/// <typeparam name="TEnum">枚举类型</typeparam>
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public static List<string> GetDescriptions<TEnum>()
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{
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return GetDescriptions(typeof(TEnum));
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}
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/// <summary>
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/// 获取名称集合
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/// </summary>
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/// <param name="type">枚举类型</param>
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public static List<string> GetDescriptions(Type type)
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{
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type = Common.GetType(type);
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if (type.IsEnum == false)
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{
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throw new InvalidOperationException($"类型 {type} 不是枚举");
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}
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List<string> result = [];
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foreach (FieldInfo field in type.GetFields())
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{
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if (!field.FieldType.IsEnum)
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{
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continue;
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}
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string description = ReflectionHelper.GetDescription(field);
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result.Add(description);
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}
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return result;
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}
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/// <summary>
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/// 是否单一标记
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static bool IsSingleFlag(Enum obj)
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{
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int intValue = GetValue(obj.GetType(), obj);
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return (intValue > 0) && ((intValue & (intValue - 1)) == 0);
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}
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/// <summary>
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/// 获取第一个标记
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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 GetFirstFlag<T>(T value) where T : Enum
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{
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long v = System.Convert.ToInt64(value);
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long first = v & -v;
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return Enum.GetValues(typeof(T)).Cast<T>().First(flag => System.Convert.ToInt64(flag) == first);
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}
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}
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/// <summary>
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/// Enum展示类型
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/// </summary>
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public enum EnumDisplayType
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{
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Text,
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Value,
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Description,
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CommonItem
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}
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public class EnumItem
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{
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public string Name { get; init; }
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public int Numeric { get; init; }
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public string Description { get; init; }
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public EnumItem(string name, int numeric, string description)
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{
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Name = name;
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Numeric = numeric;
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Description = description;
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}
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}
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public class EnumItem<TEnum> : EnumItem where TEnum : struct, Enum
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{
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public TEnum Value { get; }
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public EnumItem(TEnum value)
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: base(value.ToString(), System.Convert.ToInt32(value), GetDescription(value))
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{
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Value = value;
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}
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private static string GetDescription(TEnum value)
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{
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var field = typeof(TEnum).GetField(value.ToString())!;
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var attr = field.GetCustomAttribute<DescriptionAttribute>();
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return attr?.Description ?? string.Empty;
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}
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}
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