Hierarchical routes are routes where one or more parameters go before the action parameter, for example:
Book/{id}
Book/{id}/Chapter/{chapterId}/{page}
There are 2 ways to achieve this. One, is by decorating controller properties with the FromRoute attribute, for example:
public class BookController : Controller {
[FromRoute]
public int id { get; set; }
protected override void Initialize(RequestContext requestContext) {
base.Initialize(requestContext);
this.BindRouteProperties();
}
public ActionResult Index() {
...
}
public ActionResult Chapter([FromRoute]int chapterId, [FromRoute]int page = 1) {
...
}
}Properties decorated with the FromRoute attribute are always required.
The other way is by using the CustomRoute attribute:
public class BookController : Controller {
[CustomRoute("{id}")]
public ActionResult Details([FromRoute]int id) {
...
}
[CustomRoute("{id}/{action}/{chapterId}/{page}")]
public ActionResult Chapter([FromRoute]int id, [FromRoute]int chapterId, [FromRoute]int page = 1) {
...
}
}The advantage of using the CustomRoute attribute is that you can implement Book and Book/{id} on the same controller.