ASP.NET MVC3 ModelState and RouteData placement

Question

in MVC3, is route data always in the modelState collection, or is it only in the modelState collection if that key is specifically requested as per the model binder for the applicable controller action ?

To illustrate:

public HomeController { ActionResult Index(string id)

Home/Index/5?something=else

Would the modelState dictionary have the key something and value else, or would it only have the key id?

Answer 1

It is only in the ModelState when it is part of the action method argument(s). To get other route info, you need to look at the controller's RouteData property.