ContextBoundObject 上下文对象的用法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Runtime.Remoting.Contexts;
using System.Runtime.Remoting.Activation;
using System.Runtime.Remoting.Messaging;
using System.Reflection;

namespace ConsoleApplication1
{


    public class UserTrack : ContextAttribute
    {
        public UserTrack() : base("UserCreate") { Console.WriteLine("UserContextAttribute Create..."); }
        public override void GetPropertiesForNewContext(IConstructionCallMessage ctorMsg)
        {
            ctorMsg.ContextProperties.Add(new Processer());
            //base.GetPropertiesForNewContext(ctorMsg);
        }
    }

    [UserTrack()]
    public class User : ContextBoundObject
    {
        private string _userName = "";
        private string _nick = "";
        public User() { Console.WriteLine("UserObject Create..."); }
        public string UserName
        {
            get { return this._userName; }
            set { this._userName = value; }
        }

        public string Nick
        {
            get { return this._nick; }
            set { this._nick = value; }
        }

        public string Password = "";
    }


    public class Processer : IContextProperty, IContributeObjectSink
    {

        #region IContextProperty 成员

        public void Freeze(Context newContext)
        {

        }

        public bool IsNewContextOK(Context newCtx)
        {
            return true;
        }

        public string Name
        {
            get { return "mmcgzs.tracker"; }
        }

        #endregion

        #region IContributeObjectSink 成员

        public IMessageSink GetObjectSink(MarshalByRefObject obj, System.Runtime.Remoting.Messaging.IMessageSink nextSink)
        {
            return new TraceSink(obj, nextSink);
        }

        #endregion
    }

    public class TraceSink : IMessageSink
    {
        private User _sender;
        private IMessageSink _nextSink;

        public TraceSink(MarshalByRefObject sender, IMessageSink nextSink)
        {
            this._nextSink = nextSink;
            this._sender = sender as User;
        }


        #region IMessageSink 成员

        public IMessageCtrl AsyncProcessMessage(IMessage msg, IMessageSink replySink)
        {
            return null;
        }

        public IMessageSink NextSink
        {
            get { return this._nextSink; }
        }

        public IMessage SyncProcessMessage(IMessage msg)
        {
            IMethodCallMessage call = msg as IMethodCallMessage;

            PropertyAction property = GetCallProperty(call);
            if (property != null)
            {
                Console.WriteLine(property.Action+" Property " + property.Name + " value " + property.Value);
            }
            return this._nextSink.SyncProcessMessage(call);
        }


        private PropertyAction GetCallProperty(IMethodCallMessage call)
        {
            PropertyAction p = new PropertyAction();

            if (call == null)
                return null;

            // 得到调用的方法的信息
            MethodBase methodInfo = call.MethodBase;

            if (methodInfo.Name.StartsWith("set_"))
            {
                p.Name = methodInfo.Name.Substring(4);
                p.Value = call.InArgs[0];
                p.Action = methodInfo.Name.Substring(0, 3);
            }
            else if (methodInfo.Name.StartsWith("get_"))
            {
                p.Name = methodInfo.Name.Substring(4);
                p.Value = methodInfo.Invoke(this._sender, null);
                p.Action = methodInfo.Name.Substring(0, 3);
            }
            else if (methodInfo.Name == "FieldSetter")
            {
                p.Name = (string)call.InArgs[1];
                p.Value = call.InArgs[2];
                p.Action = methodInfo.Name;
            }
            else if (methodInfo.Name == "FieldGetter")
            {
                p.Name = (string)call.InArgs[1];
                p.Value = this._sender.GetType().GetField(p.Name).GetValue(this._sender);
                p.Action = methodInfo.Name;
            }
            else
            {
                p = null;
            }

            return p;
        }

        #endregion
    }

    public class PropertyAction {
        public string Name = "";
        public object Value = null;
        public string Action = "";
    }

    class Program
    {
        static void Main(string[] args)
        {
            User user = new User();
            user.UserName = "mmcgzs";
            user.Nick = "毛毛虫";
            user.Password = "888888";
            string a = user.UserName;
            a = user.Password;
            Console.Read();
        }
    }

}