摘要
在数据库系统中,数据访问技术已经从连接模型发展到断开连接模型。目前,断开连接模型在应用中非常广泛,可以应用在分布式系统的开发、网络服务的应用、Web应用等。ADO.NET在断开连接模型下,可以支持脱机访问数据和数据处理,但也需要对脱机处理数据更新进行更加严密的控制。本文首先介绍ADO.NET脱机数据原理,接着探讨现有的三种开放式并发更新策略,并对此进行改进,提出新的更新并发策略。
In database system, the data access technology is developed from connecting model to disconnected model. At present, the disconnected model wins a wide range of applications, such as the development of distributed systems, network services applications, Web applications and so on. In ADO. NET disconnected model, it supports offline access to data and data processing, but it also needs to make more closely control to the offline processing of data updating. This paper first introduces the principle of ADO. NET data offline, as well as three of the existing open concurrent update strategy, and puts forward the new strategy for concurrent updates on this basis.
出处
《计算机与现代化》
2010年第3期162-165,共4页
Computer and Modernization
