How do I route a URL with a querystring in ASP.NET MVC?

Question

I'm trying to setup a custom route in MVC to take a URL from another system in the following format:

../ABC/ABC01?Key=123&Group=456

The 01 after the second ABC is a step number this will change and the Key and Group parameters will change. I need to route this to one action in a controller with the step number key and group as paramters. I've attempted the following code however it throws an exception:

Code:

routes.MapRoute(     "OpenCase",      "ABC/ABC{stepNo}?Key={key}&Group={group}",     new {controller = "ABC1", action = "OpenCase"} ); 

Exception:

`The route URL cannot start with a '/' or '~' character and it cannot contain a '?' character.` 

Answer 1

You cannot include the query string in the route. Try with a route like this:

routes.MapRoute("OpenCase", "ABC/ABC{stepNo}",    new { controller = "ABC1", action = "OpenCase" }); 

Then, on your controller add a method like this:

public class ABC1 : Controller {     public ActionResult OpenCase(string stepno, string key, string group)     {         // do stuff here         return View();     }         } 

ASP.NET MVC will automatically map the query string parameters to the parameters in the method in the controller.