How to build routes only to action and to controller with id? - asp.net

Question

I'm trying to build two routes only to action and to controller with id, keeping the default.
I have to access:
www.mysite.com/MyController/MyAction/{OptionalId}
www.mysite.com/MyController/{OptionalId}
www.mysite.com/MyActionFromHomeController
I was able to create routes to work with first and the third point, but not for the second. Current code:
public class RouteConfig
{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "OnlyActionToHomeController",
url: "{action}",
defaults: new { controller = "Home" },
constraints: new { noConflictingControllerExists = new NoConflictingControllerExists() }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
}
public class NoConflictingControllerExists : IRouteConstraint
{
private static readonly Dictionary<string, bool> _cache = new Dictionary<string, bool>(StringComparer.OrdinalIgnoreCase);
public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
{
var path = httpContext.Request.Path;
if (path == "/" || String.IsNullOrEmpty(path))
return false;
if (_cache.ContainsKey(path))
return _cache[path];
IController ctrl;
try
{
var ctrlFactory = ControllerBuilder.Current.GetControllerFactory();
ctrl = ctrlFactory.CreateController(httpContext.Request.RequestContext, values["action"] as string);
}
catch
{
_cache.Add(path, true);
return true;
}
var res = ctrl == null;
_cache.Add(path, res);
return res;
}
}

Answer 1

I did!
public class RouteConfig
{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "OnlyController",
url: "{controller}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
constraints: new { id = #"\d+" } // define the id parameter needs to be integer
);
routes.MapRoute(
name: "OnlyActionToHomeController",
url: "{action}",
defaults: new { controller = "Home" },
constraints: new { noConflictingControllerExists = new NoConflictingControllerExists() }
);
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
);
}
}
public class NoConflictingControllerExists : IRouteConstraint
{
private static readonly Dictionary<string, bool> _cache = new Dictionary<string, bool>(StringComparer.OrdinalIgnoreCase);
public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
{
var path = httpContext.Request.Path;
if (path == "/" || String.IsNullOrEmpty(path))
return false;
if (_cache.ContainsKey(path))
return _cache[path];
IController ctrl;
try
{
var ctrlFactory = ControllerBuilder.Current.GetControllerFactory();
ctrl = ctrlFactory.CreateController(httpContext.Request.RequestContext, values["action"] as string);
}
catch
{
_cache.Add(path, true);
return true;
}
var res = ctrl == null;
_cache.Add(path, res);
return res;
}
}