private void NotExisted() { Products product = null; try { // 数据库中查找 product = objProductManager.GetProductByProductId(this.textBoxProductId.Text.Trim()); } catch (Exception ex) { MessageBoxEx.Show("查询商品时出错!", Program.MessageBoxTitle[Program.MessageBoxTitleType.Error], ex.Message, MessageBoxButtons.OK, MessageBoxIcon.Error); } if (product != null) { AddtoDetailList(product, Convert.ToInt32(this.textBoxCount.Text.Trim())); } // 数据库中也没有找到 else { AddtoDetailList(GenerateNewProduct(), Convert.ToInt32(this.textBoxCount.Text.Trim())); return; } }