The Application And Research Of ASP. NET AJAX In VB Project-Based Teaching System

With the rapid development of computer and network technology, project-basedlearning and network learning platform combining conform to the current occupationeducation reform direction. Ajax completes the partial page refresh with asynchronouscommunication technologies, reduces page response times, reduces network traffic andreduces server load and a series of WEB application performance.The network teachingsystem responses more quickly and has a better user experience.Because of the character of the VB program teaching and the large quantity ofusers of network-based teaching systems are crowded simultaneously. With theliterature research method, case analysis method and comparative study method, thethesis does the jobs from the following several respects:1) Research the theories and methods of network learning platform for theproject-based teaching and process ,build a framework of "Visual Basic Programming"project teaching system based on ASP.NET Ajax, Design project tree structures of threedifferent levels for students of middle vocational school.2) This paper analyzes the definition of Ajax, architecture and working principle,the advantages and disadvantages of Ajax technology,the Appropriate scopes of itsapplication and the jobs of improving Ajax's drawback.Discuss the advantages ofASP.NET Ajax framework.3) Ajax is applied to the user registration and login module of teaching system toachieve the real-time validation of adding user information, at the same time add thetextbox with a watermark, the calendar that can automatically pop up.So that the whole interface is friendly and personalized. Ajax applies project communication system torealize no-refresh exchanging and enhance interaction. Ajax applies project evaluationsystem to reduce data overload, low server overhead, and enhances the user experience.Finally, the thesis tests the two network system architectures under the condition ofthe same load with the LoadRunner11 software, draws a conclusion that Ajaxframework compared with the traditional framework can reduce transaction responsetime and server load, which verifies the superiority of the Ajax framework.