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With the enrichment of people's material life, there are more and more used books, and the book trading system just solves the traditional book processing method, improves the utilization rate, reduces and eliminates the waste of abandoned books again, and also provides a good platform for users to sell and buy used books. The online book trading system has crossed the time and space restrictions for the commercial circulation field, brought different changes and brought convenience to consumers. The system is designed with B/S structure, and it is a fully functional online book trading system developed with c # language in the.net environment. It has certain practicability. Users can browse book information, search book data online, add interested books to favorites, or put them in shopping carts and order them. At the same time, the administrator can also manage the information and data of the whole system. In this paper, firstly, the demand analysis and structure design of online book trading system are carried out, and then the design and implementation scheme of the system are introduced.

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