Questionnaire Survey And Visual Analysis System On The Net

Questionnaire survey is an important way in the research of social science. Questionnaire survey on the net has been an ordinary form of questionnaire survey along with the development of Internet. Questionnaire for survey and research in every sociology field has the approximately same structure. Commonly,it consists of foreword, directions, survey items and epilogue. So it is feasible to design a questionnaire survey system as a template for different questionnaire design. Questionnaire survey system on the net assists us in the process of questionnaire survey on the net including questionnaire design, questionnaire collection and results statistic. There are three subsystems corresponding the three steps. That is questionnaire design subsystem, questionnaire collection subsystem, visual statistic and analysis subsystem. Questionnaire design subsystem is the base of another two subsystems. Questionnaire collection subsystem depends on questionnaire design subsystem. Visual statistic and analysis subsystem depends on another two subsystems. Questionnaire survey system on the net adopts N layers design architecture. A typical N layers structure includes five layers: Web layer, Business facade layer, Business rule layer, Data access layer and Common layer. It is tellable that Business facade adopts Facade design pattern. N layers design architecture based on .NET is a more perfect software structure at present. Questionnaire survey system on the net uses ADO.NET to access data. It has three advantages. First,ADO.NET does not depend on continuous connection, so it improves performance. Second, it uses XML as data format, so it improves interoperability. Third, transferring XML (Extensible Markup Language) between every layer can cut down the spending of system. Some technique is used to resolve the difficult problems in the realization of questionnaire survey system on the net. One trait of questionnaire survey system is that the deviser of questionnaire can define the style of questionnaire vision. Some style options are offered in the questionnaire design subsystem, and Cascading Style Sheet defines the styles in the questionnaire collection subsystem. Cascading Style Sheet includes the style definition about the elements in the HTML document. Web page appearance is controlled expediently via Cascading Style Sheet. Because the amount of questionnaire subjects or options is movable, the control cannot be confirmed in advance. So dynamic Web page controls are used. When the page is refreshed, the state of dynamic controls is difficult to keep down. So the state of every dynamic control must be held especially in the program. To reuse the statistical manner collection menu Web user control is used. User interface can be marked off and reused easily via user control in the several Web applications by ASP.NET. User control is compiled at the first request and saved in the server memory. After that the response time is little. The connection information to database is saved in the document at Web server named Web.config in the questionnaire survey system. If the...