DevForce Community Forum : Async property navigation and Exceptions http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2012 : Async property navigation and Exceptions Thu, 14 May 2026 11:47:44 -700 Thu, 07 Nov 2013 17:49:50 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=4592 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Async property navigation and Exceptions : It would be ideal if the pending... http://www.ideablade.com/forum/forum_posts.asp?TID=4592&PID=17219#17219 Author: kimj
Subject: 4592
Posted: 07-Nov-2013 at 5:49pm

It would be ideal if the pending entity API used the same async/await pattern as other asynchronous methods in DevForce, but we haven't implemented this yet.
 
Right now, although it's ugly, you can check the Query in the EntityQueriedEventArgs - it will be an EntityRelationQuery for any navigation-based query.
]]> Thu, 07 Nov 2013 17:49:50 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=4592&PID=17219#17219 Async property navigation and Exceptions : Thanks, Kimj - that helps some.So... http://www.ideablade.com/forum/forum_posts.asp?TID=4592&PID=17217#17217 Author: jbiddle61
Subject: 4592
Posted: 07-Nov-2013 at 2:27pm

Thanks, Kimj - that helps some.

So I setup an EntityManagerDelegate to handle these.
So far, so good - if I deliberately cause a database error during async navigation, the event does get passed to my delegate.

The problem I now have is that need some was to determine if I want to handle the error in the delegate or allow it to be passed on.

Basically I need to be able to tell if the exception came from async property navigation or not.
If it comes from async property navigation, I want to handle the error in the delegate; otherwise I want to let the error continue on its merry way and handle it where I am awaiting the async call.

Is there some way to do that?
Or, better yet, is there some way to actually await the async property navigation?

]]> Thu, 07 Nov 2013 14:27:55 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=4592&PID=17217#17217 Async property navigation and Exceptions : Unfortunately the Pending*Resolved... http://www.ideablade.com/forum/forum_posts.asp?TID=4592&PID=17209#17209 Author: kimj
Subject: 4592
Posted: 06-Nov-2013 at 10:42am

Unfortunately the Pending*Resolved event args don't contain error information, but you can listen on the EntityManager's Queried and EntityServerError events to receive error information.  If you've also lost connectivity, the ConnectionStateChanged event will fire too.]]> Wed, 06 Nov 2013 10:42:57 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=4592&PID=17209#17209 Async property navigation and Exceptions : If I enable async property navigation... http://www.ideablade.com/forum/forum_posts.asp?TID=4592&PID=17208#17208 Author: jbiddle61
Subject: 4592
Posted: 05-Nov-2013 at 4:26pm

If I enable async property navigation in my EntityManagers (like TempHire), is there anyway to get notified of any exceptions that are thrown?

I have my database access through a web service (n-tier).
I set a breakpoint just before the access of the navigation property.
When the breakpoint is hit, I stop the web service, and let the program continue.
My PendingEntityResolved event handler never gets called (as expected), but there does not seem to be an exception raised either.

Is there anyway to detect database errors when using async property navigation?]]> Tue, 05 Nov 2013 16:26:32 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=4592&PID=17208#17208