Inject either parent or child object based on route value in ASP.NET core

How to inject either parent or child object based on route value to a asp.net mvc core controller. If possible by .NET CORE default DI mechanism or something like structure map .

if route value is x i want to inject parent but if route value is y i want to inject child object

public class MyController : Controller {

privateIMyService myService;publicMyController(IMyService svc){
    myService= svc;}

}

public class MyParent : IMyService

public class MyChild: IMyService

//decision of which object ( MyParent object or MyChild object) is injected, is dependent on my route value(25) in

url:     www.Mysite.com/rValue/25