DevForce Community Forum : Lazy Load on Many to Many http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2010 : Lazy Load on Many to Many Wed, 13 May 2026 14:04:30 -700 Fri, 27 Jan 2012 06:29:15 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=3234 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Lazy Load on Many to Many : Great, thank you very much. http://www.ideablade.com/forum/forum_posts.asp?TID=3234&PID=12556#12556 Author: gregweb
Subject: 3234
Posted: 27-Jan-2012 at 6:29am

Great, thank you very much.]]> Fri, 27 Jan 2012 06:29:15 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3234&PID=12556#12556 Lazy Load on Many to Many : Hi Greg,Since navigation... http://www.ideablade.com/forum/forum_posts.asp?TID=3234&PID=12555#12555 Author: sbelini
Subject: 3234
Posted: 26-Jan-2012 at 5:30pm

Hi Greg,
 
Since navigation properties are retrieved asynchronously in Silverlight, you should use the PendingEntityResolved and PendingEntityListResolved events.
 
You can find detailed information about asynchronous navigation properties in the DevForce Resource Center.
 
I'm also attaching a simple solution (based on yours, but using NorthwindIB) that uses lazy loading to populate the right grid.
uploads/892/T11446.zip
 
Regards,
   Silvio.
]]> Thu, 26 Jan 2012 17:30:10 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3234&PID=12555#12555 Lazy Load on Many to Many : SilverlightApplication24.zip I... http://www.ideablade.com/forum/forum_posts.asp?TID=3234&PID=12547#12547 Author: gregweb
Subject: 3234
Posted: 25-Jan-2012 at 2:56pm

SilverlightApplication24.zip

I have a Page with Two Grids on it. On the left is a Grid of Entities. On the right is a grid which shows items related to the Entities on the left. In other words, Navigational Items.

This is wired up and it works ok.

However, the navigational items is actually a many to many link. So the links show, but it's just an id of the actual Entity that I want to show.

ParentEntity -> LinkingEntity -> actual entity.

The only way I could come up with to Bind all the way down to the actual entity was to add custom properties to the Linking Entity that match the actual entity properties. The linking entity has a navigational property to the actual entity so I can retrieve the actual properties through it.

And this works, sort of. It shows the actual properties, but it requires clicking around in the left grid to get the properties in the right to be lazy loaded. The linking entities are propertly loaded, but not the actual entity. After clicking around, it does trigger the lazy load, but it should just be loaded from the start.

Attached is a project that shows this. It connects to a database which I can make available, but it was too big to post on the forum.

One solution on this that I did find was to do an include so the actual entities are downloaded from the start instead of lazy loaded. But there will be too many of the entities to do this at production time, so we are trying to get lazy loading to work.

Also note that I tested this with both the Telerik grid, as well as the Toolkit grid, and they both product the same result. The result is that the actual entities are not loaded initially. When you click on a different row on the right, a two out of the three actual entities are loaded. Clicking back and forth in the left grid finally results in them all being loaded on the right.

Thanks,
Greg]]> Wed, 25 Jan 2012 14:56:13 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3234&PID=12547#12547