asp.net mvc, generate url by custom route - asp.net-mvc-4

Question

i have created application, where url generates depends on database values.
i parse these urls without any problem and get controller and action from database in my route handler.
but when i try to generate url, i get troubles.
in my case, it seems like:
view
#Html.ActionLink("more", MVC.Blog.Post(item.Alias)) // i use T4MVC
MyRouteConstraint
public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
{
if (routeDirection == RouteDirection.UrlGeneration)
{
var data = GetDataFromDbByControllerActionAndParameters(values);
if (data == null)
return false;
var valuesToRemove = new List<string>();
var path = GenerateUrlByData(data, valuesToRemove);
values.Remove("controller");
values.Remove("action");
valuesToRemove.ForEach(v => values.Remove(v)); // remove values that is already used in path
values.Add("all", path) // path = "blog/post/postalias"
return true;
}
// skipped code
}
route rule
routes.MapRoute("Locations", "{*all}",
constraints: new { all = new LocationConstraints() },
defaults: new { },
namespaces: new []{typeof(BaseController).Namespace}).RouteHandler = new LocationRouteHandler();
and as result i got url like this
localhost:8553/?Controller=Blog&Action=Post&alias=postalias
but expect like this
localhost:8553/blog/post/postalias
how can I generate url? where it should be? i think not in the constrant, but why it is invoked in this case?

Answer 1

In my MVC application the closest route that matches the one you have is the one below:
routes.MapRoute(
name: "MyRouteName",
url: "{SomeFolder}/{SomePageName}",
defaults: new { controller = "MyController", action = "Index" },
constraints: new { routeConstraint = new MyRouteConstraint() }
);
SomeFolder can be fixed or changed from the database while SomePageName will be changed to a different value from database. The url should be whatever URL you want to match with this route and the one that will be replaced by the value from the database. The defaults address the Controller and Action that will render the page in the end of the MVC cycle. The constraints will lead to your Match method described.
With this configuration I have URLs like www.project.com/SomeFolder/SomePageNameFromDatabase.