// GET api/sap?productId=id
        public SAPProduct GetProductById(string productId)
        {
            SAPConnector server = new SAPConnector();

            return server.GetProductById(productId);
        }
        // POST api/values
        public void Post(SAPProduct product)
        {
            SAPConnector server = new SAPConnector();

            bool result = server.UpdateProduct(product);
        }
         // GET api/sap
        public IEnumerable<SAPProduct> GetProducts(string productIdList)
        {
            SAPConnector server = new SAPConnector();

            return server.GetProducts(productIdList);
        }