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));
}