DevForce Community Forum : OfType<T> support http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2010 : OfType<T> support Tue, 21 Apr 2026 14:16:25 -700 Tue, 13 Jul 2010 17:40:33 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=1945 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ OfType<T> support : Actually, no. The filtering will... http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7616#7616 Author: ting
Subject: 1945
Posted: 13-Jul-2010 at 5:40pm

Actually, no.  The filtering will be performed by the Entity Framework on the server or by DevForce on the client.  If you are using inheritance near the root of your hierarchy (as oppposed to near the leaf) and have a lot of subclasses, this will perform very poorly with the Entity Framework.
]]> Tue, 13 Jul 2010 17:40:33 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7616#7616 OfType<T> support : Ah - thanks! Can I just check... http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7565#7565 Author: leeatkinson
Subject: 1945
Posted: 08-Jul-2010 at 4:46am

Ah - thanks!

Can I just check though - this returns an IQuerable which I can cast to EntityQuery. Does the OfType filtering still take place in the storage (in my case in SQL), rather than at either the server or the client?

Lee]]> Thu, 08 Jul 2010 04:46:57 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7565#7565 OfType<T> support : You might be missing a using statement.... http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7557#7557 Author: ting
Subject: 1945
Posted: 07-Jul-2010 at 7:21pm

You might be missing a using statement.  Can you check for:

using System.Linq
 
]]> Wed, 07 Jul 2010 19:21:26 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7557#7557 OfType<T> support : What reference do I need to enable... http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7542#7542 Author: leeatkinson
Subject: 1945
Posted: 07-Jul-2010 at 4:41am

What reference do I need to enable OfType<> in Silverlight? For example, the following doesn't work (OfType doesn't exist).

var mgr = new EntityManager();
mgr.Employees.OfType<Manager>();

I have tried the following and works - but is that functionally identical to the above?

var mgr = new EntityManager();
mgr.GetQuery<Manager>();

Lee
]]> Wed, 07 Jul 2010 04:41:07 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7542#7542 OfType<T> support : Yes. We support the entire range... http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7531#7531 Author: ting
Subject: 1945
Posted: 06-Jul-2010 at 5:31pm

Yes.  We support the entire range of operators that are available in the Entity Framework, including OfType<T>.
]]> Tue, 06 Jul 2010 17:31:27 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7531#7531 OfType<T> support : Hi In the Silverlight client,... http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7527#7527 Author: leeatkinson
Subject: 1945
Posted: 06-Jul-2010 at 1:26pm

Hi

In the Silverlight client, is OfType<T> supported? It doesn't seem to be, but the list at http://www.ideablade.com/DevForceSilverlight/DevForceSilverlight_And_WCF_RIAServices_FeatureComparison.aspx suggests it is.

Lee]]> Tue, 06 Jul 2010 13:26:02 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=1945&PID=7527#7527