how to route this in mvc web api?

Question

I have this requirement to map the url

api/v1/Contact/12/tags

in the above url the Contact is the controller, and 12 is the contactId and tags is the action is want to be called.

The method is like this

[HttpGet]
public List<TagModel> Tags([FromUri]int contactId)

I have did like this

 config.Routes.MapHttpRoute(
                name: "RouteForHandlingTags",
                routeTemplate: "api/v1/{controller}/{id}/{action}",
                defaults: new { },
                constraints: new { id = @"\d+" }
                );

I am getting the error "No HTTP resource was found that matches the request URI http://localhost:4837/api/v1/contact/12/tags"

I have tried

[HttpGet]
public List<TagModel> Tags(int contactId)

and

 config.Routes.MapHttpRoute(
                    name: "RouteForHandlingTags",
                    routeTemplate: "api/v1/{controller}/{id}/{action}"
                    );

But all are giving the same error. But when I do a call like this

api/v1/Contact/12/tags?contactid=12

everything works fine. But this is not what I want. The contactId is specified after contact. Can anyone please tell me how to route this?

Answer 1

The parameter names in your action and route must match. You can either change your action to:

[HttpGet]
public List<TagModel> Tags(int id)

Or change your route to:

config.Routes.MapHttpRoute(
    name: "RouteForHandlingTags",
    routeTemplate: "api/v1/{controller}/{contactId}/{action}",
    defaults: new { },
    constraints: new { id = @"\d+" }
    );

Note: you do not need [FromUri] with a primitive type like an int.