用Data控件建立与数据库的连接，并在连接的基础上在相应的绑定控件中实时显示数据库中的数据，通过操作实现数据库中数据追加、修改、删除和查询。-To establish a connection to the database Data Controls and connections on the basis of data in the database is displayed in real time in the corresponding bound control, the oper