WebAPI Routing Using Action Names

gistfile1.cs

routes.MapHttpRoute(
  name: "DefaultApiWithAction",
  routeTemplate: "api/{controller}/{action}/{id}",
  defaults: new { id = RouteParameter.Optional },
  constraints: new { action = @"^[^\d].*$" }
);

routes.MapHttpRoute(
  name: "DefaultApiWithId",
  routeTemplate: "api/{controller}/{id}",
  defaults: new { action = "Get", id = RouteParameter.Optional },
  constraints: new { httpMethod = new HttpMethodConstraint("Get") }
);

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