EnumHelper枚举帮助类——反射取得枚举Description

Posted 2020-08-09

1、需要引用的命名空间： 

1 using System.Collections.Generic;//键值对
2 using System.Reflection;//反射
3 System.ComponentModel;//指定属性

2、直接上干货，需要的拿走：

（1）、列举所有枚举值和描述

 1         /// <summary>
 2         /// 列举所有枚举值和描述
 3         /// </summary>
 4         /// <typeparam name="T"></typeparam>
 5         /// <returns></returns>
 6         public static Dictionary<int, string> GetDescriptionDictionary<T>() where T : struct
 7         {
 8             Type type = typeof(T);
 9             Dictionary<int, string> dictionary = new Dictionary<int, string>();
10             foreach (int item in System.Enum.GetValues(type))
11             {
12                 string description = string.Empty;
13                 try
14                 {
15                     FieldInfo fieldInfo = type.GetField(System.Enum.GetName(type, item));
16                     if (fieldInfo == null)
17                     {
18                         continue;
19                     }
20                     DescriptionAttribute da = (DescriptionAttribute)Attribute.GetCustomAttribute(fieldInfo, typeof(DescriptionAttribute));
21                     if (da == null)
22                     {
23                         continue;
24                     }
25                     description = da.Description;
26                 }
27                 catch { }
28                 dictionary.Add(item, description);
29             }
30             return dictionary;
31         }

（2）、列举所有枚举值和索引

 1         /// <summary>
 2         /// 列举所有枚举值和索引
 3         /// </summary>
 4         /// <param name="typeParam"></param>
 5         /// <returns></returns>
 6         public static Dictionary<int, string> EnumToFieldDictionary(Type typeParam)
 7         {
 8             //Type typeParam = typeof(obj);
 9             Dictionary<int, string> dictionary = new Dictionary<int, string>();
10             foreach (int i in System.Enum.GetValues(typeParam))
11             {
12                 string name = System.Enum.GetName(typeParam, i);
13                 dictionary.Add(i, name);
14             }
15             return dictionary;
16         }

（3）、获取指定枚举值的描述

 1         /// <summary>
 2         /// 获取指定枚举值的描述
 3         /// </summary>
 4         /// <typeparam name="T"></typeparam>
 5         /// <param name="request"></param>
 6         /// <returns></returns>
 7         public static string GetDescription<T>(T request) where T:struct
 8         {
 9             try
10             {
11                 Type type = request.GetType();
12                 FieldInfo fieldInfo = type.GetField(request.ToString());
13 
14                 if (fieldInfo == null) { return string.Empty; }
15 
16                 DescriptionAttribute da = (DescriptionAttribute)Attribute.GetCustomAttribute(fieldInfo, typeof(DescriptionAttribute));
17 
18                 if (da != null)
19                 {
20                     return da.Description;
21                 }
22                 else
23                 {
24                     return string.Empty;
25                 }
26             }
27             catch
28             {
29                 return string.Empty;
30             }
31         }

（4）、关于扩展
需要的童鞋可以自己写个【获取指定枚举值的描述】的扩展方法，小牛这里没有必要就没写。

 

 【明日小牛】原创——转载请注明出处