public string AddGoodBrand(string brandName)
        {
            var loginUser = (UserInfo)Session["LoginUser"];

            GoodsBrand brand = new GoodsBrand();

            brand.CreateUserId   = loginUser.UserId;
            brand.CreateUserName = loginUser.UserName;
            brand.Id             = Guid.NewGuid();
            brand.BrandName      = brandName;
            brand.IsDelete       = false;
            brand.Country        = string.Empty;
            brand.Country        = "中国";

            var res = _manager.AddGoodsBrand(brand);

            return(Utils.SerializeObject(res));
        }