DevForce Community Forum : Entity Refetch and PropertyChanged http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2010 : Entity Refetch and PropertyChanged Sun, 26 Jul 2026 17:31:06 -700 Mon, 18 Jul 2011 12:06:27 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=2830 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Entity Refetch and PropertyChanged : Thanks Silvio! http://www.ideablade.com/forum/forum_posts.asp?TID=2830&PID=11252#11252 Author: samir
Subject: 2830
Posted: 18-Jul-2011 at 12:06pm

Thanks Silvio!]]> Mon, 18 Jul 2011 12:06:27 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2830&PID=11252#11252 Entity Refetch and PropertyChanged : Hi Samir,DevForce will raise... http://www.ideablade.com/forum/forum_posts.asp?TID=2830&PID=11251#11251 Author: sbelini
Subject: 2830
Posted: 18-Jul-2011 at 12:01pm

Hi Samir,
 
DevForce will raise PropertyChanged on an entity when it´s first loaded only if you set it the event handler in the constructor.
However, this will not work in n-tier because serialization does not use the constructor.
 
In the PropertyChanged handler you will not be able to detect if the entity is being refetched or rolledback, but you could do it by using the EntityChanged handler instead. It has EntityActions that would help you determine these events:
 
void mgr_EntityChanged(object sender, EntityChangedEventArgs e) {
  if (e.Action == EntityAction.ChangeCurrentAndOriginal || e.Action == EntityAction.ChangeOriginal) {
    MessageBox.Show("Refetch");
  }
  if (e.Action == EntityAction.Rollback) {
    MessageBox.Show("RejectChanges");
  }
}
 
Regards,
   Silvio.


Edited by sbelini - 18-Jul-2011 at 12:02pm]]> Mon, 18 Jul 2011 12:01:16 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2830&PID=11251#11251 Entity Refetch and PropertyChanged : Hi.From what I was able to... http://www.ideablade.com/forum/forum_posts.asp?TID=2830&PID=11237#11237 Author: samir
Subject: 2830
Posted: 14-Jul-2011 at 4:05pm

Hi.
 
From what I was able to verify, DevForce raises PropertyChanged on an entity with e.PropertyName="" when it´s first loaded, when it´s refetched and also when we call RejectChanges().
 
Is there any way to know in my PropertyChanged handler if the entity is being first loaded, refetched or RejectChanges() has been called?
 
Thanks,
Samir
]]> Thu, 14 Jul 2011 16:05:01 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2830&PID=11237#11237