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Asked: 2026-05-24T11:58:41+00:00

i have one doubt To use this sentence: filterContext.RouteData.Values[MyRouteValue] the key should be declared

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i have one doubt

To use this sentence: filterContext.RouteData.Values["MyRouteValue"] the key should be declared in a Route in the route table right?

I mean, should be in the route table something like: {MyRouteValue}/

If i have a request like /Controller/Action?MyRouteValue=XXXXXXX im getting null from filterContext.RouteData.Values["MyRouteValue"]. This means that if i want to get the value i have to use filterContext.Controller.ValueProvider.GetValue(“publicationUrlTitle”).AttemptedValue istead?

Thanks in advance.

Regards.

Jose.

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1 Answer

  1. Editorial Team

    To use this sentence: filterContext.RouteData.Values[“MyRouteValue”]
    the key should be declared in a Route in the route table right?

    Yes.

    If i have a request like /Controller/Action?MyRouteValue=XXXXXXX im
    getting null from filterContext.RouteData.Values[“MyRouteValue”]. This
    means that if i want to get the value i have to use
    filterContext.Controller.ValueProvider.GetValue(“publicationUrlTitle”).AttemptedValue
    istead?

    Yes, use ValueProvider or read it from filterContext.HttpContext.Request["MyRouteValue"]. The advantage of using ValueProvider is that it looks in many places: route data, GET query string parameters, POST parameters, custom value providers such as a JSON value provider in ASP.NET MVC 3, …

    Just be careful by when you access the .AttemptedValue property as you might get a NRE if the MyRouteValue is nowhere to be found.

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