The web service age is coming, and developers should always construct the application with the help of the system service. This model enables developers to use a large number of programming resources and accurately control the action of these applications. Today, developers are architecture a compound multilayer architecture system that will integrate all applications on the Internet and then create unique value. This makes developers need to pay attention to the special services to be provided rather than the re-establishment of the entire system, such results will save products to the market, achieve higher development capacity, and ultimate goals: high quality software. We are entering the next new stage computer computing phase, a stage triggered by the Internet, which fully uses new Internet access standard technology -XML. With innovative software technology, XML allows you to create a powerful application that allows anyone or anywhere. It increases the application of the application and the continuous connection of the software. In this way, the software is not only the thing installed from the disc, but a service, just like a call service or paying video program, it needs to be obtained via a communication medium. In order to achieve the goal of software network, we use two qualities, one for more elastic multi-level (N-Tier), the other is the message-oriented concept on the web page, we call such an operation The Way is "Web Services", which symbolizes the next phase of the application of the application. The so-called web service (Web Services) is a standard protocol, such as: http, xml, completely presenting software services, or software services used on Internet or internal network, you It is also possible to imagine it is a component programming on the web page. In terms of concept, program developers are integrated into web services (APIS) by calling the application interface (APIS), just like calling the meant service. This difference is that the web service call can serve the remote system through the network. For example, Microsoft Passport enables programming procedures to apply for certification. With the programs of Passport Service, the program designer can use the Passport's architecture, relying on Passport to maintain the user database to ensure that it works normally, and data backup, etc. .NET is the principle of the web service (Web Services), Microsoft is currently through the complete .NET architecture platform (including all components), so that the web service is firmly resolved. The next generation of program development tools and infrastructure include Visual Studio .NET, .NET Framework, Windows .NET and .NET Enterprise Serves, etc., are designed to develop applications on the web service module. In addition, .NET regional service (.NET Building Block Services), new .NET Device Support (.Net Device Support), and the upcoming .NET user experience (.NET user experience) three design Provide complete development tools and experiences, allowing continuous application development to truly utilize the techniques given by the web service module.
