MVC 2 comes with built-in support of Model validation but how do I do "input validation"? For example I have an interface of creating memo where I have populated the view with dynamic checkboxes corresponding to employees. The validation is straight forward i.e do not submit if no checkbox is selected.
I wonder if there is a way of doing such things in DataAnnotations. I have searched the internet and found that people have written a lot of code to validate password and confirm password validation just for the sake of doing it the nicer way.
My question is if there is a nicer way for my problem or should I just count number of checkboxes in my controller action and return error if no checkbox is selected?