Well, firstly, it is incomplete. You do not have a method name.
Secondly, it will already work with format URLs:
/ controller / action configName = Foo &? Addparams = bar
Here's how to do it with good routes:
routes.MapRoute(
"YourMapping",
"{controller}/{action}/{configName}/{addParams}");
or
routes.MapRoute(
"YourMapping",
"{controller}/{configName}/{addParams}",
new {
controller = "YourController",
action = "YourAction"
},
new {
controller = "YourController"
});
URL.