The Design And Implementation Of Irrigation Area Water Charging System Based On AJAX

As the rapid development of the Web, an increasing number of people pay great attention to a Web technology AJAX. The AJAX technology adopts asynchronous calls method to refresh partial page, so it can reduce network traffic only through sending and receiving their required data to and from the server. Besides, it will enable Web applications to respond more immediately, better interactive, and provide more user-friendly as well as personalized service, allowing users to use Web applications just like using desktop applications which enhances the users'experience. Compared with the traditional Web technology like Applet, Flash etc., the AJAX can be used directly in most popular browsers, through sending the asynchronous request by XMLHttpRequest without the support of specialized software.This paper centered on the interaction patterns of the Web application under the ASP.NET AJAX framework provided by the Microsoft Corporation on the basis of the platform of ASP.NET 2.0. Theoretically, the paper discussed the core of AJAX technologies, as well as the differences and associations of the Web application development between under the AJAX pattern and under the traditional pattern in terms of application principle and function improvement. It provides the theory basis for the best practice of AJAX. In practice, the ASP.NET AJAX development environment was built for the application of AJAX. With the requirement of the project "Irrigation Area Water Charging System", the AJAX technology was applied in the system, which fully demonstrates the advantages of system development under the AJAX pattern. The key of this paper is the realization of AJAX technology in the Water Charging System.This paper focuses on the following aspects:(1) It summarizes the application features and key advantages of AJAX technology through a comparative analysis between the AJAX technology and the traditional Web development technologies. Besides, it analyzes and summarizes how the AJAX works, and how the AJAX complete asynchronous calls.(2) It investigates the ASP.NET 2.0 AJAX framework provided by Microsoft, builds an ASP.NET AJAX development environment for developing an AJAX instance and equips an ASP.NET AJAX Web application.(3) It analyzes the requirement of Water Charging System.(4) It applies AJAX technology to the modules of Water Charging System, achieves refresh-free data interaction, watermark effect for the text box, cascading-dropdown and so on. The AJAX technology reduces page's reload, lowers server's expense, and enhances users' experience.