Design And Implementation Of The Railway Construction MIS Based On Components

As Internet technology goes on rapidly, the request to the informationality of the society increases steadily. The structural application of the tradition's client/ server have already dissatisfied continuously expand of announce, for the sake of the problem in the mode of C/S, Web application procedure system based on components emerge with the tide of the times. In the three-layer architecture model information system is divided into: expression layer, business logic layer, DBMS layer. Therefore, three-layer architecture is obviously superior to two-layer architecture in maintaining/ expansibility, reusage, security etc.Designing an application Using PowerBuilder8.0 combined with EAServer is the trend of electronic commerce, etc. It realizes a thin client from its appearance. This article will illustrate the process of the railway constration MIS based on components using EAServer.This paper is based on EAServer component technology. The development of the railway construction MIS is presented in this paper. The business is characterized by a great many of distributed information sources and variable statistic rules and items for different statistic purposes. To solve these problems, the system adopted the three-layer architecture based on Sybase EAServer. The business logic is encapsulated as components that are executed in the component transaction server. By this means, the performance is greatly improved and the system becomes much easier for maintaining and expending.There are not only most important theoretical significances but also practical significances in this article. The theoretical significances of the article are that its new ideas are a development to the field & thought of relevant modern computing methods, and the practical significances are that it an put forward a new method of solving and analysis on the process of Supplies Selection in SCM in practice.