Web-based Dotnet Application Systems Design And Research

On February 13 in 2002, DOTNET launch, some IT professionals praise it and the other criticize, but up to now, DOTNET is still develop rapidly like a raging fire.Now, DOTNET didn' t attain the strategic goal of the Microsoft, it is still a new computing and communication development platform that based on the open internet protocols and standards and realize interaction of all kinds of languages and platform for making programming under the third generation Internet environment simple. But this platform like a martial art superior, gather many advanced techniques in his own body, such as the ADO, ADO. NET, XML, Web Services and etc. It integrates the concept of the procedure and network organically, certainly, it will push the development of network and computing technology greatly; It makes the concept of the Web Services public; It integrates many programming languages as c#, Vb, Vc++, Jscript and etc, so it can program system by several different programming languages, raise the efficiency and convenience development. By Integrate and apply new technology and compact old technology, DOTNET have strong vitality and unique advantage in system development, good objct-orientedness, releasing easily, good maintainability, strong transplantability and etc.This thesis emphasize on studying the realization of three-tier application system under DOTNET construct and DOTNET data access technologies and Web Services and so on by set up web application system that based on DOTNET platform and can run in intranet. By develop this system successfully, I set up three-tier Web Application, and subdivide the business layer into data access layer and the business logic layers and seal them by classes; I study ADO, AD0.NET data access technology in many ways, not only realize them in class, but also in WEB Services, not only by using the read-only, forward-only DataReader, but also operate data such as retrieval and amend by DataAdapter and DataSets, so i had more thorough understanding to DOTNETplatform and comprehended its superiority more deeply.The thesis includes seven chapters. Chapter one is detailed to introduce the background of the system development applied DOTNET platform, mainly include the business background, software function, the development platform-DOTNET, adoptive technologies, such as ADO. NET, Web service and so on, clarify the superiority that use . NET develop Web application system based internal. Chapter 2 introduces the whole frame of the system, such as how many layers be divided into and the relation between each layer and the realization of the layers and etc. Chapter 3 to 6 mainly introduce technologies used by development process, the process and arithmetic of each layers. The last chapter is summary and outlook, evaluate and review the system in whole.Because of the time limit and the actual circumstances of the software, the business layer did not divided into data-entity layer and entity-control layer, and the thesis didn't concern that use the XML documents to define entity class, and accessing database table by store process didn't come true, the design of the interface is also easy, all of above is still perfected and developed in the future.