>>
>>

>><Rant ON>
>>I'm now trying to transition from vb.net and asp.net to c#/Entity Framework/LINQ/Silverlight/RIA on a project. 
>>
>>Silverlight is another giant leap in not ready for primetime development environments (if you want to work with data anyway). Combobox bound to data in a datagrid? Why would someone want that? Stored procedures? In Silverlight? Apparently they aren't BEST PRACTICES anymore since the Domain Service doesn't support them. 
>>
>>Wading through piles and piles of incomplete/incorrect blogs and other posts from drooling geeks around the world trying to show the hacks to get things to work since there is no direct way to do it.
>>
>>What happened to RAD, or developer productivity? What a load of $hit.
>>
>></Rant OFF>
>>

>
>That's a crock of crap. We have an industry leading financial app (priced in the 10's of millions of dollars) in use by the top mutual fund processing companies in the world. Guess what? It's written in Silverlight. so you're assertion that Silverlight is not ready for primtime is just a figment of your non-understanding. silverlight takes 6 months or so to finally grock the change in thinking required. If you can't handle the shift from weak typing to strong typing or the lack of hungarian notation for naming conventions, you'll never grasp the complexities of a language like Silverlight or WPF. Happy coding in html...

Good for you!

Now, clearly explain binding the Combobox (in a datagrid column) to data. The items should come from a field in one of the entity tables. The selectedvalue (and initialvalue) should bind to one of the fields in the current context (that the datagrid is using).

Expand the explanation to several lines if needed.

Same with including a stored procedure in the domaindatasource. Include stored procedures that return existing entity types (subset of a table) and ones that return complex types.

Again, Expand the explanation to several lines if needed.

And yes - I've googled the top 50 drooling geek blog entries that attempt to demonstrate the workarounds for this and they are incomplete or wrong (of cource, no microsoft help). A clear explanation in your words of how to do this is appreciated.