基于ADO．NET构建数据库访问中间层类库的研究

为了使数据设计和程序开发完全分离，减少二者间耦合，达到项目便于分割，任务便于独立，提高效率，减少错误的目的。采用构建数据库访问类库的方法。本方法已在理论考核系统、远程辅助教学系统等多个系统中做了实验，并验证了其效果的良好性。得到了一个结论，有了这样一个中间层，项目主程序的开发者，可以完全不需要了解数据的细节，只需要构建这个类库的对象，通过对这些对象的读写操作，就可以完成对数据库的操作。

Research of ADO.NET-based database establishment to access to intermediate layer class library

In order to separate the data design from program development completely to reduce the coupling of the two,to carry the point of splitting up the project,to be convenient to keep the independence of tasks,to improve the efficiency and to reduce errors,a method of building a database accessing to the class library was adopted.This method was applied to theoretical examination system and remote assistance teaching system for validation.The results indicate that the method is effective.With the intermediate layer,the main project’s developers only need to build the objects of the library without understanding the details of the data completely,and can implement the operation of the database by read-write operation to these objects.