Class/Model Level Validation (as opposed to Property Level)? (ASP.NET MVC 2.0)

Question

Basically, what the title says. I have several properties that combine together to really make one logical answer, and i would like to run a server-side validation code (tha

Answer 1

Possible Dupe:

Writing a CompareTo DataAnnotation Attribute

The answers to your questions should be there and at the very least it points to this blog post:

http://byatool.com/mvc/custom-data-annotations-with-mvc-how-to-check-multiple-properties-at-one-time/

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To get the error message to display you must use:

<%: Html.ValidationMessage("") %>

What happens is because your validating on a class level your getting a ModelState with a key, aka property name usually, with an empty string.