AngularJS - ajax - MVC file multiple upload withou

Question

I am using Flow.JS http://flowjs.github.io/ng-flow/ for file upload.

My requirement is such that I will have to send the following data all in one save button click

1. multiple files
2. two string values alongwith the files.

The following way works fine.

Upload ajax call

    $scope.UploadFiles = function (flows) {
    var data = new FormData();
    $.each(flows.files, function (i, flowfile) {
        data.append('file' + i, flowfile.file);
    });

    data.append('message', $scope.Subject);
    data.append('subject', $scope.Message);

 $.ajax({
        url: 'url\savedata',
        data: files,
        cache: false,
        contentType: false,
        processData: false,
        type: 'POST'
    }); 

}

And my MVC conroller

    public JsonResult Savedata()
    {

        var httpRequest = System.Web.HttpContext.Current.Request;
        if(httpRequest.Files.Count != 0)
        {
            var collection = 0;
            foreach (string file in httpRequest.Files)
            {
              //manipulate file data
            }
        }

         var message = httpRequest.Forms['message'];
         var subject= httpRequest.Forms['subject'];

    }

All this works fine. I want to know if there is a better way to do this instead of using form data and possibly send all this data using a data model instead, since I need that for some MVC data validations.