MVC routing not working when default and custom route refer to same controller - asp.net-mvc-routing

Question

I have two routers in my global.asax, one is a default router which is like:
routes.MapRoute(
"Default", // Route name
"{controller}/{action}/{id}",
new { controller = "Test", action = "Action1", id = UrlParameter.Optional }
);
and other is Custom router:
routes.MapRoute(
"CustomRouter", // Route name
"Test/{id}/{FacetString}/{CurrPageNo}",
new { controller = "Test", action = "Action12", id = "", FacetString = UrlParameter.Optional, CurrPageNo=UrlParameter.Optional }
);
some how when I pass url "http://localhost/Test/1001/State=TX" the second router should get executed but some how its not executing.
I had read that the sequence of router is important, hence I tried to exchange there sequence, but it is still not working, if I place it above default router than, the cutom router gets called for all the other actions in that router, which should not happen

Answer 1

the last URL-component State=TX looks like a query string parameter to me. Shouldn't it be ?State=TX (which then wouldn't match your route) or /State/TX

Answer 2

it seems like you should use constraints, reducing match rate for your custom router. You can use forth parameter to define your constraints. In this case it can be something like this
routes.MapRoute(
"CustomRouter", // Route name
"Test/{id}/{FacetString}/{CurrPageNo}",
new { controller = "Test", action = "Action12", id = "", FacetString = UrlParameter.Optional, CurrPageNo=UrlParameter.Optional
, new {id=#"\d+"});
in this way your second URL section requires to be numeric in order to get executed.

Answer 3

According your second route your url should be in one of these formats
http://localhost/Test/1001
http://localhost/Test/1001/State
http://localhost/Test/1001/State/3
Also there is no need of controller = "Test", action = "Action12" as they are not part of the second route definition
Have a look at this MSDN link on ASP.NET routing