C# AOP实现

using System; using System.Collections.Generic; using System.Text; using System.Runtime.Remoting.Proxies; namespace Aop { public class AopAttribute : ProxyAttribute { public override MarshalByRefObject CreateInstance(Type serverType) { AopProxy realProxy = new AopProxy(serverType); return realProxy.GetTransparentProxy() as MarshalByRefObject; } } }

AopProxy.cs

using System; using System.Collections.Generic; using System.Text; using System.Reflection.Emit; using System.Runtime.Remoting.Proxies; using System.Runtime.Remoting.Messaging; using System.Runtime.Remoting.Activation; using System.Windows.Forms; namespace Aop { public class AopProxy : RealProxy { public AopProxy(Type serverType) : base(serverType) { } public override IMessage Invoke(IMessage msg) { if (msg is IConstructionCallMessage) { IConstructionCallMessage constructCallMsg = msg as IConstructionCallMessage; IConstructionReturnMessage constructionReturnMessage = this.InitializeServerObject((IConstructionCallMessage)msg); RealProxy.SetStubData(this, constructionReturnMessage.ReturnValue); MessageBox.Show("Call constructor"); return constructionReturnMessage; } else { IMethodCallMessage callMsg = msg as IMethodCallMessage; IMessage message; try { object[] args = callMsg.Args; object o = callMsg.MethodBase.Invoke(GetUnwrappedServer(), args); message = new ReturnMessage(o, args, args.Length, callMsg.LogicalCallContext, callMsg); } catch (Exception e) { message = new ReturnMessage(e, callMsg); } MessageBox.Show(message.Properties["__Return"].ToString()); return message; } } } }

AopAttribute.cs

using System; using System.Collections.Generic; using System.Text; namespace Aop { [AopAttribute] public class AopClass : ContextBoundObject { public string Hello() { return "welcome"; } } }

AopClass.cs