Web Forms :: Allow Only Valid Data In URL Routing

I use url routing according to this article [URL] .....

In global.asax i use this code

public static void RegisterRoutes(RouteCollection routes) {
        routes.Add("BikeSaleRoute", new Route  (
           "{Data}/",
           new CustomRouteHandler("~/Details.aspx")
        ));
    }

Here when I write behtob.com/1111 or behtob.com/test it go to details.aspx page i want instead of {Data} it read behtop column from my DB  and according to that behcode it go to details.aspx and fill that page with user's  information that have behcode in address bar i want bind it from data base

Id Behcode Name Description image
1 2222 Iron Test 1.jpg
4 3333 Laundry Test 2.jpg

I want some thin like facebook.