Managing state tracking in Silverlight

Question

Will EF4 provide a solution for self-tracking entities (via proxy or other solution) in Silverlight ? Will there be a context-based solution or snapshot-based solution ? I would like to hear more regarding NTier support for situations where ObjectContext is not supported on all layers.

Thanks in advance,
Ido Flatow.

Answer 1

Hello Ido,

We released self-tracking entities today as part of the Microsoft Entity Framework Feature CTP 1. You can learn more about what we released today here:

http://blogs.msdn.com/adonet/archive/2009/06/22/announcing-entity-framework-feature-ctp-1.aspx

And in particular about self-tracking entities here:

http://blogs.msdn.com/adonet/archive/2009/06/22/feature-ctp-walkthrough-self-tracking-entities-for-entity-framework.aspx

The version included in the Feature CTP 1 generates entity types that make use of WCF attributes such as OnDeserializing and OnDeserialized that are not present in Silverlight 2, and that therefore cannot be used in Silverlight 2 directly. However, having self tracking entities that can be compiled and run in Silverlight is one of our long term goals.

Thanks,
Diego

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Answer 2

Hello, Diego B Vega

       You say '... and that therefore cannot be used in Silverlight 2' , do you mean that this can work with Silverlight 3 ??

Answer 3

Hello,

FYI, the new version of Self-Tracking Entities that we shipped in the Feature CTP 2 work in Silverlight 3. Find more information and the download here:

http://blogs.msdn.com/adonet/archive/2009/11/04/ado-net-entity-framework-community-technology-preview-released.aspx

Thanks,
Diego

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This posting is provided "AS IS" with no warranties, and confers no rights.