登录（简单三层架构）源码

利用简单的登录和用户管理来演示三层结构的使用，数据绑定控件采用的是：GridView

我一直在寻找 稳健的三层架构 我也一直在研究 最后发现了 using的好处 自动连接 自动关闭 在 BLL中进行业务逻辑操作 UI中做显示

-Login (simple three-tier architecture) source using the login and user management to demonstrate the use of the three-tier structure, used by data-bound controls: the GridView I have been looking for a robust three-tier architecture I have been studying the last found using benefits automatically connect automatically shut down in the BLL do show business logic operation UI