Codejock Developer Community : Overloading DoPropExchange() http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 14 May 2026 09:42:26 +0000 Thu, 24 Dec 2009 10:39:29 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=15917 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[Overloading DoPropExchange() : Hi, Use pGroup-&gt;GetItems()-&gt;Add(new...]]> http://forum.codejock.com/forum_posts.asp?TID=15917&PID=55840&title=overloading-dopropexchange#55840 Author: Oleg
Subject: 15917
Posted: 24 December 2009 at 10:39am

Hi,

Use pGroup->GetItems()->Add(new CYourgroupItem());  instead of AddTextItem.
]]> Thu, 24 Dec 2009 10:39:29 +0000 http://forum.codejock.com/forum_posts.asp?TID=15917&PID=55840&title=overloading-dopropexchange#55840 <![CDATA[Overloading DoPropExchange() : I wish to store to disk certain...]]> http://forum.codejock.com/forum_posts.asp?TID=15917&PID=55823&title=overloading-dopropexchange#55823 Author: EricFowler
Subject: 15917
Posted: 23 December 2009 at 3:25pm

I wish to store to disk certain properties associated with each group text item in a task panel (it is a text string comprising a database key used to look up associated information, but that should not matter).

Since serialization is handled through DoPropExchange() I assume I must overload some part of that mechanism.

If I declare a class derived from CXTPTaskPanelGroupItem, then overload DoPropExchange() in that class, I am faced with the problem that insertion of my items into my group is done through CXTPTaskPanelGroup::AddTextItem(), which returns an object of type CXTPTaskPanelGroupItem *, which does not support my overload.

My first attempt was to derive a class from CXTPTaskPanelGroup, and have it create and insert my item. But the problem remains: the stored item is not of my class, but the base class, and the serialization/deserialization code I insert into the derived class will not be called.

What am I doing wrong? Remember, the objective is to store a small invisible bit of text along with a task panel group item, and to read/write it out of/into the same archive as is routinely done with DoPropExchange(). This must be easy.

Thanks

Eric]]> Wed, 23 Dec 2009 15:25:47 +0000 http://forum.codejock.com/forum_posts.asp?TID=15917&PID=55823&title=overloading-dopropexchange#55823