Asp.Net MVC - Create a route that match everything but some strings - asp.net

Question

I want to create a Mvc route that match every string, but all those ones that contains some values, for instance, I have this route:
context.MapRoute(
"Users_Bootstrap",
"{ulrPrefix}/{*catchall}",
new { controller = "Start", action = "Index" },
namespaces: new[] { "Fanapo.Web.Areas.Users.Controllers" },
constraints: new { }
);
I want this route doesn't match any string that urlPrefix parameter be Account or Admin or ...
Something like this: ulrPrefix NOT IN [Account, Admin, ...]
I think this should be solved using regular expresions, hope IRouteConstraint be the last option. Thanks.

Answer 1

Solved using route constrains, based on this answer
public class NotInRouteConstraint : IRouteConstraint
{
private readonly string _notInString;
public NotInRouteConstraint(string notInString)
{
_notInString = notInString;
}
public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values,
RouteDirection routeDirection)
{
if (string.IsNullOrEmpty(_notInString))
return true;
var notList = _notInString.Split('|').Select(s => s.Trim().ToLower()).ToList();
var value = values[parameterName] as string;
if (!string.IsNullOrEmpty(value))
{
return !notList.Contains(value.ToLower());
}
return true;
}
}
The usage code:
//this is in another area
context.MapRoute(
"Users_Bootstrap",
"{ulrPrefix}/{*catchall}",
new { controller = "Start", action = "Index" },
constraints: new { ulrPrefix = new NotInRouteConstraint(RouteConfig.ReservedUrlPrefix.JoinStrings("|")) }
);
Hope there is another nicer solution. Thanks.
EDIT
A bit more faster:
public class NotInRouteConstraint : IRouteConstraint
{
private readonly IEnumerable<string> _notInString;
public NotInRouteConstraint(IEnumerable<string> notInString)
{
_notInString = notInString;
}
public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values,
RouteDirection routeDirection)
{
if (_notInString == null)
return true;
var value = values[parameterName] as string;
if (!string.IsNullOrEmpty(value))
{
return !_notInString.Contains(value.ToLower());
}
return true;
}
}
AND
context.MapRoute(
"Users_Bootstrap",
"{ulrPrefix}/{*catchall}",
new { controller = "Start", action = "Index" },
constraints: new { ulrPrefix = new NotInRouteConstraint(RouteConfig.ReservedUrlPrefix.Select(s=>s.Trim().ToLower())) }
);