c# - Chain of events / Proxy to original object -

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i have class inherited context bound object. class has attribute on properties. when property changed, postprocess(imessage msg, imessage msgreturn) raise event , event again new property same attribute fired. second change should call postprocess, not happening. because, object second property changed not original .net object marshalbyrefobject / contextboundobject / proxy object. query how cast proxy original object. tried casting , synchonizationattribute, not help. let know events executing in async manner not block code execution, , both proxy , original object exist in same app domain.

i tried 2 object, 1 holding reference of second, , when property of first changed, try change property of second, did not invoke postprocess.

basically need make tree various objects depending on property of other objects. , when 1 property changed, should trigger watcher, , spread chain untill no watcher found. trying contextboundobject.

sample:

public class powerswitch : objectbase {     [watchable]     public bool ison { get; set; }     public bool isworking { get; set; } }  public class bulb : objectbase {     public color color { get; set; }     [watchable]     public bool ison { get; set; }     protected override void update(object sender, propertychangeeventargs e)     {         ((bulb)this).ison = !((bulb)this).ison;            //<-- b1.update should called after this, not     } }  [watchable] public class objectbase : contextboundobject {      public virtual void watch(objectbase watch, string propertyname)      {          watch.watcher.add(this, propertyname);      }       protected virtual void update(object sender,                              propertychangeeventargs e) { }       public dictionary<objectbase, string> watcher                       = new dictionary<objectbase, string>();       internal void notifywatcher(              propertychangeeventargs propertychangeeventargs)      {           watcher.where(sk => sk.value == propertychangeeventargs.name)                         .tolist()                         .foreach((item) =>                         {                             item.key.update(this, propertychangeeventargs);                              });           }     }

main method

        powerswitch s1 = new powerswitch();         bulb b1 = new bulb();         b1.watch(s1, "ison");         s1.ison = true; //<-- b1.update called after

please suggest alternate or better way implement want achieve.

it looks you're close observer pattern, observers subscribe status notifications on subject.

in pattern, b1.ison = true contain code cycles through observers , notifies them of changes. guess if wanted observe lot of properties on 1 object, encapsulate notification code. b1.ison have single line says like: 

this.sendnotification("ison", value);

this seems lot you're doing... if read on pattern might end feeling little more confident, , maybe make few changes standardize code.

by way, there built .net -- iobservable(t). haven't used this, looks strong.


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