public ActionResult DeletePaintConfig(PaintDiscountConfigModel model)
        {
            if (string.IsNullOrWhiteSpace(model.ServicePid) || model.SurfaceCount < 1)
            {
                return(Json(new { Status = false, Msg = "未知的删除对象" }, JsonRequestBehavior.AllowGet));
            }
            var manager = new PaintDiscountConfigManager();
            var user    = User.Identity.Name;
            var result  = manager.DeletePaintDiscountConfig(model.PackageId, model.ServicePid, model.SurfaceCount, user);

            return(Json(new { Status = result, Msg = $"删除{(result ? "成功" : "失败")}" }, JsonRequestBehavior.AllowGet));
        }