in MVC4 shows and error that I have to implement some Interface but I am already done it

Question

I am trying to create own filter attribute in order to support multilinguality. The idea is simple. URL stands for language.

*http://host.ext/en/rest_of_the_url* will open in English and
*http://host.ext/hy/rest_of_the_url* will open in Armenian.

The problem is that at run it says that MultilingualActionFilterAttribute

Here is the error text "The given filter instance must implement one or more of the following filter interfaces: IAuthorizationFilter, IActionFilter, IResultFilter, IExceptionFilter."

Here I am using it as global filter.

namespace TIKSN.STOZE.WebApp
{
    public class FilterConfig
    {
        public static void RegisterGlobalFilters(System.Web.Mvc.GlobalFilterCollection filters)
        {
            filters.Add(new TIKSN.STOZE.Common.MultilingualActionFilterAttribute());
            filters.Add(new System.Web.Mvc.HandleErrorAttribute());
        }
    }
}

Here I am defining it.

namespace TIKSN.STOZE.Common
{
    public class MultilingualActionFilterAttribute : System.Web.Mvc.ActionFilterAttribute
    {
        public override void OnActionExecuting(System.Web.Mvc.ActionExecutingContext filterContext)
        {
            string language = System.Convert.ToString(filterContext.RouteData.Values["language"]);

            System.Diagnostics.Debug.Print("Requested language is '{0}'", language);
            language = Helper.PickUpSupportedLanguage(language);
            System.Diagnostics.Debug.Print("Supported language is '{0}'", language);

            if (language == string.Empty)
            {
                filterContext.HttpContext.Response.RedirectToRoutePermanent(new { language = Common.Properties.Settings.Default.DefaultLanguageCode });
            }

            language = Helper.TryToPickUpSupportedLanguage(language);

            System.Threading.Thread.CurrentThread.CurrentCulture = System.Globalization.CultureInfo.CreateSpecificCulture(language);
            System.Threading.Thread.CurrentThread.CurrentUICulture = System.Globalization.CultureInfo.GetCultureInfo(language);
        }
    }
}

That all looks OK. Is this a brand new MVC4 site or one upgraded from MVC3? It could be a dll version issue - have you tried deleting your temporary ASP.NET files? — levelnis, Dec 04 '12 at 19:22

score 26 · Answer 1 · answered Dec 04 '12 at 19:31

26

if you are using web api then the problem may happen because of implementing wrong interface, as IActionFilter is defined in both System.Web.Http.Filters and System.Web.Mvc namespaces.

answered Dec 04 '12 at 19:31

Behnam Esmaili

5,835
6
32
63

1

No, there are not any 'using'-s. I have implemented System.Web.Mvc.ActionFilterAttribute class, which itself implements System.Web.Mvc.IActionFilter interface. – TIKSN Dec 04 '12 at 20:20
7

Web API filters are registered using GlobalConfiguration.Configuration.Filters. Check [this](http://forums.asp.net/t/1835666.aspx) for more info. – Florin Dumitrescu May 21 '13 at 19:16

score 3 · Accepted Answer · answered Dec 22 '13 at 16:36

3

The problem was that I updated to MVC 5, so I had to update web.config files too. Look here.

answered Dec 22 '13 at 16:36

TIKSN

615
1
6
24

Since the link is dead, could you please tell me what you had to do? – Cyril Mestrom Oct 23 '14 at 08:04
1

Link is not dead. Please check it again. – TIKSN Oct 25 '14 at 15:52

score 2 · Answer 3 · edited May 23 '17 at 12:25

2

This one works:

Please add your filter to the webApiconfig instead of filter config file.

From A. Murray:

https://stackoverflow.com/a/32518692/4853768

edited May 23 '17 at 12:25

Community

1
1

answered Jun 13 '16 at 11:34

Selva Ramaswamy

81
1
1

in MVC4 shows and error that I have to implement some Interface but I am already done it

3 Answers3

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