http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2010 : How do I get a "real" HasChanges? Wed, 29 Jul 2026 17:41:43 -700 Mon, 14 Mar 2011 11:08:24 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=2556 http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ http://www.ideablade.com/forum/forum_posts.asp?TID=2556&PID=10167#10167 Author: smi-mark
Subject: 2556
Posted: 14-Mar-2011 at 11:08am

No problem. By the way, you do not need to call BeginEdit() in DevForce.]]> Mon, 14 Mar 2011 11:08:24 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2556&PID=10167#10167 http://www.ideablade.com/forum/forum_posts.asp?TID=2556&PID=10166#10166 Author: AuerRo
Subject: 2556
Posted: 14-Mar-2011 at 11:01am

It works indeed! Thank you very much!]]> Mon, 14 Mar 2011 11:01:47 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2556&PID=10166#10166 http://www.ideablade.com/forum/forum_posts.asp?TID=2556&PID=10165#10165 Author: smi-mark
Subject: 2556
Posted: 14-Mar-2011 at 8:42am

I've created some extension methods to do this.

It hasn't been fully tested yet but it seems to work on everything I've done so far.


public static bool IsDirty(this EntityWrapper wrapper)
{
    if (wrapper.EntityAspect.EntityState == EntityState.Unchanged)
        return false;

    if (wrapper.EntityAspect.EntityState == EntityState.Added)
        return true;

    return wrapper.EntityAspect.EntityMetadata.DataProperties
        .Where(p =>
            p.GetValue(wrapper, EntityVersion.Original) != p.GetValue(wrapper, EntityVersion.Current)
            &&
            !p.GetValue(wrapper, EntityVersion.Original).Equals(p.GetValue(wrapper, EntityVersion.Current)
            )).Any();
}

public static bool IsDirty(this EntityManager manager)
{
   return manager.GetEntityGroups().Any(g => g.Any(w => w.IsDirty()));
}
]]> Mon, 14 Mar 2011 08:42:17 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2556&PID=10165#10165 http://www.ideablade.com/forum/forum_posts.asp?TID=2556&PID=10164#10164 Author: AuerRo
Subject: 2556
Posted: 14-Mar-2011 at 2:44am

Hi, quick intro: "real" HasChanges means HasChanges to return False, if changes are undone manually in the UI by the user.

I'm quite new to DevForce, and had the similar question in RIA Services before. As I switched to DevForce (several reasons), ran into the same problem, and thought maybe there is a solution for this already implemented.

Description:

• I have an entity (e.g. Employee), on which I activate IEditableObject.BeginEdit() and change a Property (e.g. Property "Surname" from "Auer" to "Auerrr").
• If I call employee.EntityAspect.HasChanges, it returns True, perfect.
• Now I change the Property back to the original value ("Surname" from "Auerrr" to "Auer").
• I want HasChanges to be False, but it isn't.

Questions: 

• Do I have to compare all entity-properties in my own code, or is there an easy way to achieve a "real" HasChanges? 
• If I have to compare them on my own, what would be the best way to achieve this? (I think the easiest way would be to compare the properties with the clone-source created in the implementation of IEditableObject, but: Is there a way to access it?)
• What is the difference between EntityAspect.IsChanged and EntityAspect.HasChanges()?

Thanks for any hint!

]]> Mon, 14 Mar 2011 02:44:33 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2556&PID=10164#10164