Application Research On Network Classroom Education-Aided System Based On .NET

With the Internet wave sweeping the globe, Web system applications have gained increasing attention. For the purpose of systematic study of online classroom teaching aid system based on .NET, this thesis summaried the domestic and international development and research findings on online classroom teaching aid system, and made application study for the actual needs of the teaching and management in Heilongjiang University of Chinese Medicine.In this thesis, the organizational structure and functional requirements of online classroom teaching aid system are studied and analyzed in detail, and the system logic model is designed. A B/S model based online classroom teaching aid system is developed by applying ASP.NET and SQL Server mode, which implements dynamic, interactive and effective management of classroom information. The function modules, including user registration, material download, online communication, Video-on-Demand, experiment reservation, and teaching quality evaluation, are analyzed and designed.To solve the problem of the large amount data transfer of teaching videos, the streaming media technique is applied, which makes it possible to play the media during the data transfer process, thus ensures the real-time video play, reduces the startup delay, and saves the storage space of the client, also provides technical support for the Video-on-Demand feature. Windows Media Service is used in the system for streaming media services, and vedio is played in web browser by Windows Media Player.Security is a key factor in assuring the proper operation of online classroom teaching aid system. The most important threat is the SQL injection attacks. The means of seperating web server from database server, turning off error message on server, erasing xp_cmdshell in stored procedure, filtering sensitive characters and encryptoin of important data are applied to prevent SQL injection attacks, and enhance the system robustness.The development and application of online classroom teaching aid system enriched the teaching and management methods, offered students with a vivid, intuitive learning environment, provided meaningful complement to traditional classroom teaching and excellent evaluation platform for the research of modern education methods. It is of practical value, and its application can be further promoted.