c# - Binding to a new instance of an object -

i trying figure out how create new instance of object without breaking xaml bindings. right i'm working observablecollection i'll call:

container.myclass.mycollection 

in viewmodel (with inpc implemented via kind of magic):

public observablecollection<myobject> collection {      { return container.myclass.mycollection; }  } 

in view:

<stackpanel>     <textblock text="{binding collection.count}" />     <itemscontrol itemssource="{binding collection}">         <itemscontrol.itemspanel>             <itemspaneltemplate>                 <uniformgrid columns="1" />             </itemspaneltemplate>         </itemscontrol.itemspanel>         <itemscontrol.itemtemplate>             <datatemplate>                 <button content="{binding name}" />             </datatemplate>         </itemscontrol.itemtemplate>     </itemscontrol> </stackpanel> 

so, if try 'fresh' instance of class, can call , have bindings remain intact:

public void workingsomewhatfreshinstance() {     container.myclass.mycollection.clear();      container.myclass.mycollection.add(new myobject() { name = "test1" });     container.myclass.mycollection.add(new myobject() { name = "test2" }); } 

however, if call method:

public myclass brokenfreshinstance() {     var myclass = new myclass();      myclass.mycollection.add(new myobject() { name = "test1" });     myclass.mycollection.add(new myobject() { name = "test2" });      return myclass; } 

and then:

container.myclass = initialize.brokenfreshinstance(); 

the bindings no longer update. there way use new instance of object , have xaml bindings remain intact?

you can tell view refresh binding new instance calling propertychanged on observable:

public observablecollection<myobject> collection {     { return _collection; }     set      {         _collection = value;         raisepropertychangedevent("collection");     } } 

you need assign collections property trigger event:

 collection = container.myclass.mycollection;   //this trigger propertychangedevent  ...  container.myclass = initialize.brokenfreshinstance();  collection = container.myclass.mycollection;   // trigger again.. 

or can raise change manually doing:

container.myclass = initialize.brokenfreshinstance(); raisepropertychangedevent("collection");