public JsonResult Add(AttachmentVModel model)
        {
            var result = new JsonResultModel();

            if (ModelState.IsValid)
            {
                //add
                result.ResultState = Attachments.AddAttachment(Attachments.AttachmentVModelToInfo(model)) > 0;
            }
            else
            {
                result.ResultState = false;
                result.Message     = ModelStateHelper.GetAllErrorMessage(ModelState);
            }

            return(Json(result));
        }