asp.net mvc - error constructor controller MvC 4 -

 public partial class registrationcontroller : controller {      private readonly ipartnerrepository _partnerrepository;      public registrationcontroller(ipartnerrepository partnerrepository)     {          _partnerrepository =partnerrepository;      }} 

i use autoface dependancy injection , have error:

` no parameterless constructor defined object. description: unhandled exception occurred during execution of current web request. please review stack trace more information error , originated in code.  exception details: system.missingmethodexception: no parameterless constructor defined object.  source error:  unhandled exception generated during execution of current web request. information regarding origin , location of exception can identified using exception stack trace below.  stack trace:   [missingmethodexception: no parameterless constructor defined object.]    system.runtimetypehandle.createinstance(runtimetype type, boolean publiconly, boolean nocheck, boolean& canbecached, runtimemethodhandleinternal& ctor, boolean& bneedsecuritycheck) +0    system.runtimetype.createinstanceslow(boolean publiconly, boolean skipcheckthis, boolean fillcache, stackcrawlmark& stackmark) +113    system.runtimetype.createinstancedefaultctor(boolean publiconly, boolean skipcheckthis, boolean fillcache, stackcrawlmark& stackmark) +232    system.activator.createinstance(type type, boolean nonpublic) +83    system.activator.createinstance(type type) +6    system.web.mvc.defaultcontrolleractivator.create(requestcontext requestcontext, type controllertype) +55  [invalidoperationexception: une erreur s'est produite lors de la tentative de création d'un contrôleur de type « registration.front.web.controllers.registrationcontroller ». assurez-vous que le contrôleur un constructeur public sans paramètre.]    system.web.mvc.defaultcontrolleractivator.create(requestcontext requestcontext, type controllertype) +179    system.web.mvc.defaultcontrollerfactory.getcontrollerinstance(requestcontext requestcontext, type controllertype) +80    system.web.mvc.defaultcontrollerfactory.createcontroller(requestcontext requestcontext, string controllername) +74    system.web.mvc.mvchandler.processrequestinit(httpcontextbase httpcontext, icontroller& controller, icontrollerfactory& factory) +197    system.web.mvc.mvchandler.beginprocessrequest(httpcontextbase httpcontext, asynccallback callback, object state) +49    system.web.mvc.mvchandler.beginprocessrequest(httpcontext httpcontext, asynccallback callback, object state) +50    system.web.mvc.mvchandler.system.web.ihttpasynchandler.beginprocessrequest(httpcontext context, asynccallback cb, object extradata) +16    system.web.callhandlerexecutionstep.system.web.httpapplication.iexecutionstep.execute() +301    system.web.httpapplication.executestep(iexecutionstep step, boolean& completedsynchronously) +155 ` 

when delete constructor, haven't error:

  public partial class registrationcontroller : controller {      private readonly ipartnerrepository _partnerrepository;      public registrationcontroller()     {        }} 

how can resolve this?

asp.net mvc has special service responsible creating instance of controller - service should implement icontrollerfactory interface. default implementation of icontrollerfactory expects controller has parameterless constructor , invokes it. if want use di controllers have 2 possible options:

1. write own implementation of icontrollerfactory uses di container instantiating controller. can register in such way:

   var factory = new customcontrollerfactory(container); controllerbuilder.current.setcontrollerfactory(factory);

2. implement idependencyresolver can resolve piece of mvc infrastructure including controllers.

second option preferrable.

you can read stuff more details here (it's unity container think should give enough knowledge autofac well.