Web Services-based Distributed Application

Foreign trade companies belong to export-oriented enterprise and it is necessary for them to construct their distributed information system network that incorporates their internal system and external channels, in order to meet their ever increasing development and their business extending to outside world and at same time obtain the objective of improving work efficiency, perfecting work methods and assist in the policy making of the managers. The main purpose of paper is to reseach a distributed system model suitable for application in foreigh trade.First of all the article analyzed the development, characteristics and architecture of distributed system, and then the technology of the prevailing distribution components technology and web service respectively. It is then contemplated that a multi-layer distributed application system is to be made realistic by way of web service. The article goes deeply into the components, operating mechanism and important related protocols of web service and at the same time it discusses important components, system architecture, working principle of the .NET framework's and way for developing web service. The article focuses on bring forward the idea of unitized model for the distributed based on web service and .NET remote processing, and it also analyzed main problems in this model and put forward corresponding scheme for solving them. The article brought forward the view of combining above-mentioned technologies with foreigh application software, and at same time put the result of research into pratical application. In the end a distributed system is finalized based on this unitized model, which provides a humanistic management system for foreigh enterprise, and achived good effect.It is approved by pratical application that the union distributed system model based on web service and remoting has good expansibility, retractility and portability.It can be constructeddistributed application system with well-performance and good usability based on this model.