public void SaveNodesTest()
        {
            service = new DataService.AgriculturalProductsDataService();
            var nodes = service.GetNodes();

            service.Save(nodes);
        }
        public void SaveNodeTest()
        {
            service = new DataService.AgriculturalProductsDataService();
            var nodes = service.GetNodes("http://www.xinfadi.com.cn/marketanalysis/0/list/13455.shtml");

            service.Save(nodes);
        }