How to configure the url with a combination of url segmentation and querystring for web api rest url

Question

(using Web api 1.0) I have a scenario where my action has multiple parameters like GetCustomer(int id, string email) where the url would be specified as

GET api/Customer/{id}/{email}

But i am looking to configured the url as

api/Customer/{id}?email={email}

So it's a combination if url segmentation with query string. Currently when i am trying to set this i am getting this below error.

The route URL cannot start with a '/' or '~' character and it cannot contain a '?' character. Parameter name: routeUrl

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );

        routes.MapRoute(
         "Help Area",
         "",
         new { controller = "Help", action = "Index" }
     ).DataTokens = new RouteValueDictionary(new { area = "HelpPage" });

    }
}

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {                                                                             

      config.Routes.MapHttpRoute(
          name: "DefaultApi",
          routeTemplate: "{controller}/{id}",
          defaults: new { id = RouteParameter.Optional }
      );

      config.Routes.MapHttpRoute(
           name: "ApiWithAction",
           routeTemplate: "{controller}/{action}/{id}",
           defaults: new { id = RouteParameter.Optional }
       ); 
    }
}

kindly help me in fixing this thanks in advance

Answer 1

Your configuration needs updating

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config) {

      config.Routes.MapHttpRoute(
          name: "CustomerApi_GetCustomer",
          routeTemplate: "api/Customer/{id}",
          defaults: new { controller = "Customer" action = "GetCustomer" }
      );

      config.Routes.MapHttpRoute(
          name: "DefaultApi",
          routeTemplate: "api/{controller}/{id}",
          defaults: new { id = RouteParameter.Optional }
      );

      config.Routes.MapHttpRoute(
           name: "ApiWithAction",
           routeTemplate: "api/{controller}/{action}/{id}",
           defaults: new { id = RouteParameter.Optional }
       ); 
    }
}

If you make a request to api/Customer/{id}?email={email}

the binder will automatically match the GetCustomer(int id, string email) with the email parameter from the url