The Research And Implementation Of Dynamic Workflow Technology Ased On.NET

The Workflow technology is a kind of technology that the all or part of the business process is supported by computer or automatic processed.The development and progress of computer technology directly promote the continuous development of the workflow technology. People use it to organize business process, handle the business logic and manage the structure of the organization.This method largely solves the problems in the process of enterprise information, improves the efficiency of the enterprise and enhances the competitiveness of the enterprises.The dynamic workflow system is a system which allows to modify the workflow process instance when it is running. The traditional workflow system requirements can only be edited and modified in the process definition phase of the process. After the process began to run.there is no longer available for any operation. However, the modern business processes are not static,they need to make some changes in the process running to ensure it meets the change of business needs. Therefore, by introducing the dynamic workflow technology to ensure business processes during operation according to the actual situation and make the appropriate changes and adjustments to improve the adaptability of workflow systems.First of all, we do some research about the status of the workflow technology at home and abroad, analyze the advantages and shortcomings of the existing workflow systems.and study the basic knowledge of workflow technology, including the workflow definition and related concepts,the workflow reference model and the basic concepts of workflow management system, and analysze its structural system. And then we study the dynamic workflow definitions and concepts, as well as the main research contents of dynamic workflow system which provides a theoretical foundation for the later design.Then, for the development of a practical system, based on the front theory, we put forward and design the system structure of the system. In the system, we use the classic three-tier architecture system that they are the presentation layer, the logic layer and the data layer. We theoretically study the dynamic workflow implementation principle and do a lot of researches and analsis of the dynamic modification which is the key point of the dynamic workflow system, including the dynamic modification of the classification, the research of the achieve strategy and the basic operation. And at last. We propose a expansion strategy to achieve this dynamic workflow system.Finally, from the two aspects of the process instance and activity instance state transition mechanism and extend, we design rules of the nodes and circulation conditions used in this system, to design a workflow engine that supports dynamic modification.And then, we design a dynamic workflow system based on.NET which supports the modification of the process definition and the process instance. The system is based on Microsoft.net framework, using the classic three-tier architecture. It gives full play to the.NET framework and C#technical advantage, has greatly improved the system dynamic and flexibility.