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