中文摘要：

介绍了ADO．NET类的体系结构．详细阐述了．NET中四种数据库访问方式对应的数据提供器及其命名空间的引用．以SQL Server数据库的访问为例介绍了ASP．NET环境下利用ADO．NET访问数据库的技术，并给出了部分的实现代码。

英文摘要：

The paper describes the architecture of the class of ADO. NET, and expounds four data providers relative to the different methods of accessing database and how to use the namespace, and discusses the technique of accessing database by using ADO. NET under the circumstance of ASP. NET, which introduces by the examples of accessing SQL Server database, and then gives the main code of the apphcation.