ASP.NET Dynamic Data Validation of Navigation Properties

Question

Hi,

I've scaffolded some entities with Dynamic Data, and while it's simple to validate the regular properties, either with attributes or partial-class methods, I can't figure out how to validate navigation properties, for example, a list of players on a team represented by a dropdown in details view. There is no "on-changing" method for them.

Also, what's the best way to hook into dynamic data to do complex client-side validation, like comparing the values of several controls?

Thanks!

Bob