Patterns To Use When Building Complex Web UI?

I need to implement a wizardy, dynamic UI that uses complex validation of the style:

If A = 1, show controls B, C, D. B is required, C is not, and D is not required must be less than 30 if it is populated.

If A = 2, show controls B, D, E. B is not required, D is required but has no limits, and E is not required.

If B is not null, show controls B, D, E. B is not required, D is required but has no limits, and E is not required.

Historically, I have made my presentation layer as "dumb" as possible in that it is only responsible for capturing user input and binding it to the appropriate domain model. The domain model, in turn, contains the logic needed to validate it's state and that of any child objects, and then communicates any invalid state to the presentation layer via notifications. As such, this requirement for a highly "intelligent" UI represents a departure for me.

I think I have no choice but to construct 2 very similar class hierarchies:

one that will capture presentation business rules (i.e. what fields are visible) and control what renders in the View

one that will capture domain business rules (when field A = X, then field B should be not null and in the range of n to m) to disallow objects with an invalid state from being persisted


Sill I have far more questions than answers on my strategy moving forward. Is there a set of design patterns I can draw on to build such a dynamic UI? I do have the option of using ASP.NET MVC or WebForms, so whichever approach will produce cleaner, testable code is preferred.