摘   要

每年的暑期前毕业生离校前夕，放眼校园，大批即将离校的学生在校园内摆起地摊，出售自己不再需要的物品。一方面，这种“摆摊出售”的方法牵扯学生很大精力，将个人二手物品出售的学生往往需要连续数天整天出摊，另一方面，卖家仅仅简单将出售物品罗列出来，导致买家在杂乱的物品中盲目寻找，往往浏览了很多物品而并非自己所需，真正需求的物品可能找不到，这无疑增加了交易成本。一些学校试图通过有组织地开展学生二手物品交易会，来提升这种交易的效率（2009年12月西安电子科技大学“跳蚤市场”、 2007年江苏大学“以物易物”交易会），但是，类似这样的交易会并未达到很好的效果，同时，大学校园并未有专门为此类交易会准备的场地，频繁地举办这类交易会势必影响校园秩序。

要解决这个问题，关键是让信息流通更加迅速流畅。互联网无疑是最好的手段，现在校园网已经接入到学生宿舍，而学生也基本人手一台笔记本，故借助网站的形式是可行的。有了交易信息发布的网站，卖家不必专门摆摊设点，买家可以迅速浏览所有物品，一旦有交易意向可直接联系，免去了以前“交易会”这种低效的交易媒介。考虑到交易的双放并非专门的商家，可以参考C2C模式的网站，即注册用户之间的信息交流。

学生二手物品交易置换网站，采用.NET开发交易平台，利用ASP.net和C#语言编写相关功能的代码,后端连接Microsoft SQL Server数据库。

 本网站的设计旨在为了解决上文提到的若干现存校园二手买卖方式的弊病，利用信息化手段，使得校园二手交易流程得到简化，给同学们带来便捷，

关键词：二手物品； ASP.NET； SQL Server； .NET

Abstract

 Every summer，if you take a look at the school campus，lots of students who are about to leave school decide to sell their old items to youngster students. On the one hand, this "set up a stall selling" approach involves students in a great effort, the individual second-hand items for sale for several days, students often need to share the day out, on the other hand, the seller will sell only the items listed here is simple, resulting in buyers in the clutter of items in the blind to find, often visit a number of items rather than their own needs, real needs of the items may not be found, it will increase the transaction costs. Some schools have tried to organize these students to second-hand goods trade fair, to improve the efficiency of such transactions (December 2009, Xi'an University of Electronic Science and Technology "flea market" in 2007, Jiangsu University "barter" trade fair), but , fairs like this did not reach good results, while the campus has not been prepared specifically for the venue of such fairs, often held in the campus is bound to affect the order of these fairs.

To solve this problem, the key is to smooth the flow of information more quickly. Internet is the best means, now have access to the campus network student hostels, staff and students are basically a laptop, so using the form of the site is feasible. With the release of Web site transactions, sellers do not have to specifically set up their stalls, buyers can quickly browse all of the items, if there is intention to be directly linked transactions, replacing the previous "fair" this inefficient medium of exchange. Taking into account the transaction is not a specialized two-let business, C2C models can refer to the website, the exchange of information between registered users.
      Second-hand Exchange replacement school site, using. NET development trading platform, using ASP.net and C # language-related functions of the code, Microsoft SQL Server database back-end connections.

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This websit is designed to solve the problems that mentioned above and provide students with convience by uing IT technology.    

Keywords:  Second goods, ASP.NET, SQL Server, .Net