Passing value to nested apex page for editing

Question

I posted same question here https://stackoverflow.com/questions/17260701/passing-values-to-nested-apex-page-for-editing/17289978?noredirect=1#17289978

I followed the solution but getting error while accessing object is Page 2.

This is what I have done:

Page 1:

I have this command button in pageblocktable column

<apex:commandLink reRender="catTable" title="Modify" action="editBuilding" > <apex:param name="bIdModifyParam" value="{!item.id}" assignTo="{!selectedrowId}"/> </apex:commandLink>

On click of button showing this dialog with javascript:

    <div class="popupMain clearfix"> 
   <apex:include pageName="Page2"/> 
    </div> 

Page 1 Controller extension:

public PageReference editBuilding() { 
      for(Object__c obj : Rows)
  { 
     if(obj.Id==selectedrowId){ 
        objbuilding= obj; } 
   } 
   return null; 
 }

Page 2:

<apex:inputField value="{!objbuilding.Id}"/>  
//This line throws error saying objbulding not found

Answer 1

Page 2 needs a controller as well, even if you use the same one it will not share the value in objBuilding.

Your best bet would be to rerender the section of the page with the div popup when the button is clicked, and pass the ID as a parameter. You could then check the parameter in a controller for page 2, or you could just pass the parameter using the name "id" and use a standard controller for page 2.