The Research And Application On Distribute Information System With Multi-layer Based On Web Services

With the development of the computer technology, the information system has been applied successfully to many fields, But with the applied range wider and the applied fields deeper, the traditional system structure of the information system will not satisfied the requirements of the application any longer. The appearance of Web Services and the theory of the multi-layer structure bring the new technology to the structure design and adapt to the requirements of these new changes. They have been applied to more and more new information system projects. They extend the middle layer of the three-layer structure and divide it into several professional models by the practical requirements such as operation data layer, operation rule layer. This kind of new structure model also makes good use of the new technology in the data expression and data transmission.This paper takes the waterage management information system of ministry of communications as its background. By the research on many information system , especially on their layers and structures, this paper builds a distribute information system with six layers based on Web Services. This system use the .Net platform provided by Microsoft Corps, the method based on XML of data expression and data transmission. At the same time the encryption control is added to the transmission process. The structure of the whole system is clear, with good expansibility, and can be operated in different platforms also with safety.