asp.net mvc - Autofac DI .NET MVC controllers without default constructor -

when use ajax queries asp.net mvc controller have error: type 'web.implementation.controllers.mycontroller' not have default constructor.

my code:

    //in controller      private idataservice dataservice;      //i try delete constructor,      //because use di , don't want create currentcontext , dataservice.     public mycontroller()     {        var currentcontext = new currentcontext();        dataservice = new dataservice(currentcontext);     }      public mycontroller(idataservice dataservice)     {         dataservice = dataservice;     }      //in autofac init     builder.registertype<dataservice>().as <idataservice>(); 

how can use autofac di in case ? me please.

upd:

//in global.asax dependencyconfigure.initialize();  //in dependencyconfigure class  public static void initialize()         {             var builder = new containerbuilder();             dependencyresolver.setresolver(                 new dependency(registerservices(builder))                 );         }