C#获取Description特性的扩展类详解 C#获取Description特性的扩展类详

C#中Description特性主要用于枚举和属性，方法比较简单，记录一下以便后期使用。
扩展类DescriptionExtension代码如下：

using System; using System.ComponentModel; using System.Reflection; /// /// 描述特性的读取扩展类/// public static class DescriptionExtension{/// /// 获取枚举的描述信息/// public static string GetDescription(this Enum em){Type type = em.GetType(); FieldInfo fd = type.GetField(em.ToString()); string des = fd.GetDescription(); return des; }/// /// 获取属性的描述信息/// public static string GetDescription(this Type type, string proName){PropertyInfo pro = type.GetProperty(proName); string des = proName; if (pro != null){des = pro.GetDescription(); }return des; }/// /// 获取属性的描述信息/// public static string GetDescription(this MemberInfo info){var attrs = (DescriptionAttribute[])info.GetCustomAttributes(typeof(DescriptionAttribute), false); string des = info.Name; foreach (DescriptionAttribute attr in attrs){des = attr.Description; }return des; }}

使用方法：

[Description("测试枚举名")]enum TestEnum {[Description("测试")]Test1 }[Description("测试类名")]class TestClass{[Description("测试class")]public int Test1 { get; set; }}//获取枚举类型的描述特性string str1 = typeof(TestEnum).GetDescription(); //获取枚举值的描述特性string str2 =TestEnum.Test1.GetDescription(); str2 = typeof(TestEnum).GetDescription(nameof(TestEnum.Test1)); str2 = typeof(TestEnum).GetDescription(TestEnum.Test1.ToString()); //获取类的描述特性string str3 = typeof(TestClass).GetDescription(); //获取属性的描述特性（也可以反射遍历属性列表）string str4 = typeof(TestClass).GetDescription(); TestClass test = new TestClass(); str4 = typeof(TestClass).GetDescription(nameof(test.Test1));

补充：
C#利用扩展方法获得枚举的Description

/// /// 扩展方法，获得枚举的Description/// /// 枚举值/// 当枚举值没有定义DescriptionAttribute，是否使用枚举名代替，默认是使用/// 枚举的Descriptionpublic static string GetDescription(this Enum value, Boolean nameInstead = true){Type type = value.GetType(); string name = Enum.GetName(type, value); if (name == null){return null; }FieldInfo field = type.GetField(name); DescriptionAttribute attribute = System.Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute)) as DescriptionAttribute; if (attribute == null && nameInstead == true){return name; }return attribute?.Description; }

【C#获取Description特性的扩展类详解】随便整一个枚举