In order to use data information in the Internet, it is necessary to extract data from web pages. An HTT tree model representing HTML pages is presented. Based on the HTT model, a wrapper generation algorithm AGW is p...In order to use data information in the Internet, it is necessary to extract data from web pages. An HTT tree model representing HTML pages is presented. Based on the HTT model, a wrapper generation algorithm AGW is proposed. The AGW algorithm utilizes comparing and correcting technique to generate the wrapper with the native characteristic of the HTT tree structure. The AGW algorithm can not only generate the wrapper automatically, but also rebuild the data schema easily and reduce the complexity of the computing.展开更多
Database based web page which uses IIS4.0 + ASP + ADO + SQL7.0 is briefly introduced. It has been successfully used in E commerce, bulletin board system and chat room, and so on in the web site of Computer Center Hu...Database based web page which uses IIS4.0 + ASP + ADO + SQL7.0 is briefly introduced. It has been successfully used in E commerce, bulletin board system and chat room, and so on in the web site of Computer Center Hudong Campus, Tongji University.展开更多
利用Visual Basic.Net开发具有管理功能的B/S系统,关键是制作好各种数据库访问页。而对于Vi sual Basic.Net的三个数据绑定控件Repeater(重复)、DataList(数据列表)、Data6rid(数据表格),其中Data6rid是开发数据库访问页的最有力工具。...利用Visual Basic.Net开发具有管理功能的B/S系统,关键是制作好各种数据库访问页。而对于Vi sual Basic.Net的三个数据绑定控件Repeater(重复)、DataList(数据列表)、Data6rid(数据表格),其中Data6rid是开发数据库访问页的最有力工具。下面以Visual Basic.Net 2005为版本,论述如何在Asp.Net中巧妙使用该控件,实现各种数据库访问功能及一些特殊效果。展开更多
On the basis of the authors’ experiences of setting up an NGDC Web site,this paper attempts to present some significant aspects about the security of NGDC based on ASP.They include data storing,database maintenance,n...On the basis of the authors’ experiences of setting up an NGDC Web site,this paper attempts to present some significant aspects about the security of NGDC based on ASP.They include data storing,database maintenance,new technical support and so on.Firstly,this paper discusses how to provide the security of data which is saved in the hosts of NGDC.The security model of "Networks_DB Server_DB_DB Object" is also presented.In Windows NT Server,Internet Information Server (i.e.,IIS) is in charge of transferring message and the management of Web sites.ASP is also based on IIS.The advantages of virtual directory technique provided by IIS are emphasized. An NGDC Web site,at the Research Center of GIS in Wuhan Technical University of Surveying and Mapping is also mentioned in this paper.Because it is only an analoge used for case study,the transmission of digital spatial products is not included in the functions in this NGDC Web site.However,the management of spatial metadata is more important and some functions of metadata query are implemented in it.It is illustrated clearly in the functional diagram of the NGDC Web site.展开更多
基金the National Grand Fundamental Research 973 Program of China(G1998030414)
文摘In order to use data information in the Internet, it is necessary to extract data from web pages. An HTT tree model representing HTML pages is presented. Based on the HTT model, a wrapper generation algorithm AGW is proposed. The AGW algorithm utilizes comparing and correcting technique to generate the wrapper with the native characteristic of the HTT tree structure. The AGW algorithm can not only generate the wrapper automatically, but also rebuild the data schema easily and reduce the complexity of the computing.
文摘Database based web page which uses IIS4.0 + ASP + ADO + SQL7.0 is briefly introduced. It has been successfully used in E commerce, bulletin board system and chat room, and so on in the web site of Computer Center Hudong Campus, Tongji University.
文摘On the basis of the authors’ experiences of setting up an NGDC Web site,this paper attempts to present some significant aspects about the security of NGDC based on ASP.They include data storing,database maintenance,new technical support and so on.Firstly,this paper discusses how to provide the security of data which is saved in the hosts of NGDC.The security model of "Networks_DB Server_DB_DB Object" is also presented.In Windows NT Server,Internet Information Server (i.e.,IIS) is in charge of transferring message and the management of Web sites.ASP is also based on IIS.The advantages of virtual directory technique provided by IIS are emphasized. An NGDC Web site,at the Research Center of GIS in Wuhan Technical University of Surveying and Mapping is also mentioned in this paper.Because it is only an analoge used for case study,the transmission of digital spatial products is not included in the functions in this NGDC Web site.However,the management of spatial metadata is more important and some functions of metadata query are implemented in it.It is illustrated clearly in the functional diagram of the NGDC Web site.
