一个高效反射类
1.项目中有需要用到反射的地方，仔细研究了下反射，其效率并不高
还好微软提供了IL的编程方法，自己实现了一个高效反射类
下面举些常用例子：
我们反射出.NETFramework中的一个未公开的类 SessionStateUtility 并调用其私有方法 Deserialize
1 public static SessionStateStoreData Deserialize(HttpContext context, Stream stream) 2 { 3 DynamicMethodPrivoder _sessionStateUtility=new DynamicMethodPrivoder(typeof(SessionStateUtility), null); 5 return _sessionStateUtility.MethodInvoke("Deserialize", context, stream) as SessionStateStoreData; 6 }
注意：由于DynamicMethodPrivoder.Deserialize 是静态方法 所以DynamicMethodPrivoder构造的第二个参数为null
我们反射出 HttpContext下的一个 HttpSessionStateContainer 对象中 的私有字段 _sessionItems并获取它的值
1 public static SessionStateStoreData GetSessionStoreDate(HttpContext context) 2 { 3 IHttpSessionState container = SessionStateUtility.GetHttpSessionStateFromContext(context); 4 Type _containerType = typeof(HttpSessionStateContainer); 5 DynamicMethodPrivoder _containerPrivoder = new DynamicMethodPrivoder(_containerType, container); 6 ISessionStateItemCollection sessionItems = _containerPrivoder.Field("_sessionItems") as ISessionStateItemCollection; 7 HttpStaticObjectsCollection staticObjects = container.StaticObjects; 8 return new SessionStateStoreData(sessionItems, staticObjects, container.Timeout); 9 }
废话不多说了 直接上源码：https://files.cnblogs.com/dint/DynamicMethodPrivoder.rar
