public ActionResult UploadDialog(FileUploadViewModel model, IDictionary<string, string> postValues)
        {
            if (postValues!=null && postValues.ContainsKey("NoKeys"))
                postValues.Clear();

            model.PostValuesWithUpload = postValues;

            return PartialView("_MvcFileUpload", model);
        }
        public ActionResult UploadDialog(FileUploadViewModel model, Dictionary<string, string> postValues)
        {
            model.PostValuesWithUpload = postValues;

            return PartialView("_MvcFileUpload", model);
        }