protected void BtnSubmit_Click(object sender, EventArgs e) { ProductsModel productsModel = new ProductsModel(); Product product = CreateProduct(); if (!String.IsNullOrWhiteSpace(Request.QueryString["id"])) { int id = Convert.ToInt32(Request.QueryString["id"]); lblResult.Text = productsModel.UpdateProduct(id, product); } else { lblResult.Text = productsModel.InsertProduct(product); } }