 Monday, July 05, 2010
WCF RIA Services Part 3 – Updating Data
The third part of my series on WCF RIA Services went up a few days ago, you can check it out here: http://www.silverlightshow.net/items/WCF-RIA-Services-Part-3-Updating-Data.aspx This one starts off with a quick coverage of one important aspect of querying that I did not have room for in Part 2 – expression trees and deferred execution, and what they can do for you with RIA Services. I show how you can formulate a query on the client side based on the expression tree returned by a query method and that is what executes on the server side. Then I get into the way updating (insert, update, and delete really) works in RIA Services. I discuss the way the domain context caches data and tracks its changes, and then only sends the modified entities back in a batch when you call SubmitChanges on the domain context. I also talk a little about the async API of the domain context, which I then followed up on with this post: http://www.softinsight.com/bnoyes/2010/06/29/QueryingWCFRIAServicesAndHandlingAsyncResults.aspx Enjoy!
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