angularjs - Upload Image file with other data using Asp.net Web api 2? -

i build web application using angularjs , asp.net web api.

in view of register user have , input file upload user image , other personal information such phone number , full name , want send informations in 1 object web api.

1. web api action register :

    public httpresponsemessage register(registerbindingmodel model)     {         try         {             //we test if data correct             if (!modelstate.isvalid)             {                 return request.createerrorresponse(httpstatuscode.badrequest, modelstate);             } 

2 . registerbindingmodel :

    public class registerbindingmodel {         public string fullname {get;set;}         public string phonenumber {get;set;}         public httppostedfilebase file { get; set; }   } 

3 . angularjs view :

<form role="form" name="addform" enctype="multipart/form-data" novalidate>          <!--personal informations-->         <div class="row">             <div class="col-xs-12 text-center" >                 <div class="form-group">                     <div class="btn btn-default btn-file">                         <i class="fa fa-plus"></i> select logo                         <input type="file"                                name="file"                            ng-model="vm.registration.file" />                      </div>                             <input type="text"                                name="fullname"                            ng-model="vm.registration.fullname" />                        <input type="text"                                name="phonenumber"                            ng-model="vm.registration.phonenumber" />                     <div>                         <button ng-click="vm.register()">save</button>                     </div>                 </div> 

4. angular controller :

vm.register = function () {         authservice.saveregistration(vm.registration).then(             function (results) {             vm.cancel();         },          function (error) {            });     };     

5.angular authservice :

var _saveregistration = function (registration) {          return $http                  .post(servicebase + 'api/account/register', registration)                  .then(function (response) {             return response;         });      }; 

even if select file in web api action register have model.file equal null , other data fullname , phonenumber have correct value !

can me please ?

thank you