>>>>Hi everybody,
>>>>
>>>>I did a quick research in Google and found that if we want to update multiple rows, we would need to loop through each row and update separately. I just want to make sure it's true and this is what I need.
>>>
>>>If I understand correctly, if there are 100 items in your collection, this will fire 100 UPDATE statements back to the database. Am I correct?
...
>I'm know you know this - it's very sad if indeed EF doesn't support table types. TTs were implemented in SQL 2008. I think nearly seven years is enough time. :)
>Actually, if you were using pure ADO.NET, you can pass a datatable to a proc and do the UPDATE in one DML statement.
>If EF can't do this, I think it's pretty unfortunate.

I had read in Screppas book that there are different method signatures for update, dataset and datatable amongst them.
But as he always was big on only updating only changed rows I guessed even the methods working on more than rows would work via chatty implementation sending N update statements. Have you checked the logs/wire if a table is sent in 1 msg in such a datatable update, and if so, is it a pruned table including only changes?

curious

thomas