in my code, i have used ajax to pass file from view to controller. But i can't use" request.file", help me, please. Thanks View $('.submit').click(function() {

            $.ajax({
                type: "POST",
                url: "/umbraco/api/SignUp/UploadAnh",
                data: formData,
                datatype: "Json",
                success: function() {                            
                }
            });
        });

controller

[HttpPost]
        public ActionResult UploadAnh()
        {
            try
            {
                foreach (var ifile  in Request.Files)
                {
                    //
                }

            }
            catch (Exception)
            {

                return null;
            }
            return new RedirectToUmbracoPageResult(1325);
        }