Equivalent of [Bind(Prefix = "principalId")] in MVC4 Web Api?

Question

Background:

In MVC3, I've used the following syntax to specify custom Action parameter names:

public ActionResult ActionName([Bind(Prefix = "principalID")] int userID,
                               [Bind(Prefix = "dependentID")] long applicationID)

The route for this action was defined as follows (ActionNameConstraint is a custom IRouteConstraint):

routes.MapHttpRoute(
    "DependantAction",
    "{controller}/{principalID}/{action}/{dependentID}",
    new {controller = @"[^0-9]+", action = ActionNameConstraint.Instance, dependentID = RouteParameter.Optional}
    );

Question:

The BindAttribute is a System.Web.Mvc class. Is there an equivalent of this (parameter binding) in Web Api?

Of course, if there are other solutions to achieve the same result, I'd love to hear them!

Answer 1

You can use the System.Web.Http.FromUriAttribute attribute to specify the parameter names used for model binding.

public ActionResult ActionName(
                    [FromUri(Name = "principalID.userID")] int userID,
                    [FromUri(Name= "dependentID.applicationID")] long applicationID
                    )

FromUri tells model binding to examine the query string and the RouteData for the request.