public HttpResponseBase sortSet()
        {
            string result = "{success:false}";

            string strJson = Request.Params["result"];
            _productMgr = new ProductMgr(connectionString);
            JavaScriptSerializer js = new JavaScriptSerializer();
            List<Product> productList = js.Deserialize<List<Product>>(strJson);
            if (_productMgr.ExecUpdateSort(productList))
            {
                result = "{success:true}";
            }
            this.Response.Clear();
            this.Response.Write(result);
            this.Response.End();
            return this.Response;
        }