Database Access Middleware Research And Design

The object-oriented model becomes the first-selected model of new application program. It is a very ripe system to database system which has occupied the current database market. Because a kind of basic mismatch exists between object model and relation model, it leads to that object systematic developer spend a large amount of time taking object persistent. So it is important to instance object, and needs to introducing object/relation mapping technology to avoid mismatch of object and relation.This paper is aim to solve the existing problem of which ADO. NET access the database involved. Through deep researching and extensive practicing, it introduces object/relation mapping technology based on ADO.NET, and structures one database frame DAMS which is Database Access Middle Software. Supported by DAMS, it can be according to object-oriented model to modeling of the data, and the persistent is finished by DAMS. DAMS is realized on the basis of the relation database in common use, does not tie and fix on a piece of specific relation database products .In addition, DAMS offers to take in common use mechanism of object reuse among the relation database. It assurances that it may be put in a position to different application systems.DAMS has already successful applied to Tianjin public transit information system at present, not merely it meet user's demands, but also it has better reuse performance to the development based on .net platform.