To use the new BLL classes, all that needs to be changed is the first line of code simply replace the ProductsTableAdapter object with a ProductBLL object.

要使用新的BLL类，我们所需要做的仅仅是简单的修改一下第一行代码。

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As illustrated in Figure 16, this object passes the necessary data to the BLL, which then requests the data Access Layer to save the data to MySQL database.

如图16所示，此对象将必要的数据传递给BLL，后者随后请求数据访问层将数据保存到MySQL数据库。

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