ado自己封的类.微软公司的ADO (ActiveX Data Objects) 是一个用于存取数据源的COM组件。它提供了编程语言和统一数据访问方式OLE DB的一个中间层。允许开发人员编写访问数据的代码而不用关心数据库是如何实现的，而只用关心到数据库的连接。-ado self-proclaimed class. Microsoft s ADO (ActiveX Data Objects) is a data source for accessing COM components. It provides a unified programming languages ​ ​ and OLE DB data access method, a middle layer. Allows developers to write code to access data without concern for how the database is implemented, but only care about the connection to the database.