Attribute 和 Reflection
04年时刚接触到C#,对于Attribute感到特别稀奇,因为我翻遍了整个教程,也看不到关于Attribute的介绍,
对于在代码上面用[]括起来,觉得神秘和不可思议。我们之前学C、C++或者java都没有这种东西。而且这些东
西都不在代码的执行当中,用了有什么意义呢。不过有疑问归有疑问,要说明类是可序列化的,你还得在上面
标示上[Serializable]。那时还不懂,当时只知道如果不加这个程序就编译不过去。渐渐的,不知不觉就知道
了这个东西的用法了。Attribute大家一般都叫特性(为了区分C#中的属性)。System.Attribute也是一个类
,不过这个类好像有点特殊。如同System.Exception一样,所有的异常都要从Exception继承,所有的特性也
要从Attribue继承。个人理解Attribute是对一个类型进行描述,或者说做一个标识。Attribute是属于类型的
一部分,它不是属于类型对象的。
要声明一个自己的Attribute其实很简单。
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标识CustomPropertyAttribute的AttributeUsage本身也是一个Attribute.
现在我们来看下它的使用
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是不是感觉有点熟悉了。当时这个东西是怎样为我们服务的呢。看下面的代码
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