Conditionally validating portions of an ASP.NET MVC Model with DataAnnotations?

Question

I have certain panels on my page that are hidden under certain circumstances.

For instance I might have a \'billing address\' and \'shipping address\' and I dont wan

Answer 1

For the more complex cases I moved away from simple DataAnnotations to the following: Validation with visitors and extension methods.

If you want to make use of your DataAnnotations you would replace something like the following:

public IEnumerable BrokenRules (Payment payment)
{   
    // snip... 
    if (string.IsNullOrEmpty (payment.CCName))
    {
      yield return new ErrorInfo ("CCName", "Credit card name is required");
    }
}

with a method to validate a property by name via DataAnnotations (which I don't have atm).