层次结构数据在组合框中树形效果的动态实现

为了能使数据库中的层次结构数据在组合框中呈树形结构显示,通过实例分析了如何利用ADO.NET技术实现层次结构数据在TreeView上的动态加载技术,讨论了两种数据在组合框中以树形结构呈现的方法,特别是利用自定义用户控件实现在组合框中加载TreeView控件的方法.     

VB6.0中TreeView控件的使用

TreeView控件用于显示具有层次结构的数据,通常用来显示繁杂信息。本文介绍了VB中TreeView树型控件的属性、结点对象的添加方法,重点介绍了用TreeView控件分层显示数据库信息的实现。     

TreeView控件在ASP.NET中的动态生成

TreeView控件是Web应用程序开发中经常用到且功能强大的控件,用来显示信息的分级视图,如同Windows里的资源管理器的目录。本文主要阐述如何根据SQL Server2008数据库中的数据,在Visual Studio2010环境中用ASP.NET TreeView控件动态生成一个无级限的树形菜单。     

数据绑定技术在TreeView控件中的应用

TreeView是.NET可视化开发平台上的一个实用型控件,设计人员可采用静态填充节点的方式去快速开发与使用TreeView.利用数据绑定技术,实现将数据库中的真实数据动态绑定到TreeView节点中,并在此基础上实现快速的更新操作.     

基于TreeView和数据库的多媒体课件导航技术

TreeView是Windows应用程序中功能强大而又使用广泛的控件,将该控件与数据库结合起来用于多媒体课件的导航可给用户带来很大方便.介绍了Delphi中TreeView控件的常用属性和方法,举例说明了在多媒体课件中使用该控件树状显示、修改数据库数据的基本方法,以及根据选中的条目定位对应的媒体文件,并根据文件类型使用相应的播放控件显示/播放文件,从而实现其导航功能的方法.     

动态绑定TreeView控件实现网站分类导航

在Web应用程序开发中经常使用TreeView控件来分级或分层视图的形式来显示信息．类似于Windows中在资源管理器里以树形结构方式显示文件和目录等信息。以多层次网站分类导航为例,在ASP．NET环境下,采用递归算法实现TreeView控件与SQLServer数据库中数据的动态绑定．对于TreeView控件在实际项目开发中的应用具有一定的参考价值。     

TreeView控件复杂操作的编程技巧

本文通过对TreeView控件的拖拽组合等复杂操作的程序设计,分析了TreeView控件在复杂应用中编程实现的技术难点.     

VB6．0中TreeView控件的使用

TrceView控件用于显示具有层次结构的数据，通常用采显示繁杂信息。拳文介绍了VB中TreeView树型控件的属性、结点对象的添加方法．重点介绍了用TreeView控件分层显示数据库信息的实现。     

基于TreeView控件的文件夹的实现

TreeView控件是PowerBuilder数据库前端开发工具提供的一种高级控件。它以树形图的方式显示数据库中的数据,层次感强,便于查看从属关系。本文详细描述了一种如何利用TreeView控件,实现具有Windows资源管理器风格的文件夹的主要环节与方法。为分析和利用TreeView控件提供了借鉴。     

TreeView控件的应用

树形结构是数据理论中用来描述复杂的层次关系时使用的一个重要概念,TreeView则是其在高级开发语言中的表现形式.TreeView控件中一个树形图由节点(TreeNode)和连接线组成.TreeNode是Treeview的基本组成单元.     

A text mining approach on automatic generation of web directories and hierarchies

The World Wide Web (WWW) has been recognized as the ultimate and unique source of information for information retrieval and knowledge discovery communities. Tremendous amount of knowledge are recorded using various types of media, producing enormous amount of web pages in the WWW. Retrieval of required information from the WWW is thus an arduous task. Different schemes for retrieving web pages have been used by the WWW community. One of the most widely used scheme is to traverse predefined web directories to reach a user's goal. These web directories are compiled or classified folders of web pages and are usually organized into hierarchical structures. The classification of web pages into proper directories and the organization of directory hierarchies are generally performed by human experts. In this work, we provide a corpus-based method that applies a kind of text mining techniques on a corpus of web pages to automatically create web directories and organize them into hierarchies. The method is based on the self-organizing map learning algorithm and requires no human intervention during the construction of web directories and hierarchies. The experiments show that our method can produce comprehensible and reasonable web directories and hierarchies.     

扩展MapObjects数据源的研究II:空间数据在SQL Server中的存取

在Shapefiles空间数据序列化的基础上,讨论了怎样在SQLServer上建立含有二进制大对象(BLOB)类型数据的数据表,介绍了利用ADO.NET技术在内存中建立对应数据表(DataTable)的方法;通过连接(SqlConnection)对象、命令(SqlCommand)对象和数据适配器(SqlDataAdapter)对象等实现了在两个数据表间存取空间数据和属性数据,进而可以高效地进行GIS应用开发。     

Organizing domain-specific information on the Web: An experiment on the Spanish business Web directory

Web directories organize voluminous information into hierarchical structures, helping users to quickly locate relevant information and to support decision-making. The development of existing ontologies and Web directories either relies on expert participation that may not be available or uses automatic approaches that lack precision. As more users access the Web in their native languages, better approaches to organizing and developing non-English Web directories are needed. In this paper, we have proposed a semi-automatic framework, which consists of anchor directory boosting, meta-searching, and heuristic filtering, to construct domain-specific Web directories. Using the framework, we have built a Web directory in the Spanish business (SBiz) domain. Experimental results show that the SBiz Web directory achieved significantly better recall, F-value, efficiency, and satisfaction rating than the benchmark directory. Subjects provided favorable comments on the SBiz Web directory. This research thus contributes to developing a useful framework for organizing domain-specific information on the Web and to providing empirical findings and useful insights for end-users, system developers, and researchers of Web information seeking and knowledge management.     

U盘乱码的数据恢复

U盘出现文件和目录乱码的原因大多是病毒破坏或对U盘的不正常插拔。文件或目录乱码的修复最好的方法是用Winhex手工修复。由于系统的自启动Chkdsk操作,和通过FinalData和EasyRecovery进行数据恢复时,只能找回了U盘上的部分数据。     

Cognitive styles and users’ responses to structured information representation

Structured information repositories, such as digital libraries, Web directories, and subject gateways, require effective ways to organise and manage information. This paper focuses on Web directories and investigates the relationships between users cognitive styles and information representation. The results indicate that cognitive style influences participants reactions to the organisation of subject categories, presentation of the results, and screen layout. The findings are applied to develop a design framework that can support the improvement of Web directories and other structured digital information resources. Finally, implications for information representation are discussed.     

扩展MapObjects数据源的研究Ⅱ:空间数据在SQL Server中的存取

在Shapefiles空间数据序列化的基础上,讨论了怎样在SQL Server上建立含有二进制大对象（BLOB）类型数据的数据表,介绍了利用ADO.NET技术在内存中建立对应数据表（DataTable）的方法;通过连接（SqlConnection）对象、命令（SqlCommand）对象和数据适配器（SqlDataAdapter）对象等实现了在两个数据表间存取空间数据和属性数据,进而可以高效地进行GIS应用开发.     

使用JNDI和JDBC技术完成海量数据移植

描述了一个使用 JNDI和 JDBC技术将海量数据移植到数据库的工程例子。由于数据量达 30 G,并存储于 2 0 0 0多个不同的目录中 ,需要使用 JNDI技术来遍历这些目录 ,找到数据文件 ,然后使用 JDBC完成数据移植的任务。     

Distance-Dependent Distributed Directories

Distributed systems often make use of directory servers enabling the storage and retrieval of global information in the network. In many practical situations, the data are directly related to particular sites of the network, and therefore the desired retrieval characteristics are dependent on the network topology; for example, priority is given to having high accessibility to data generated in nearby locations. This paper defines the concept of distance-dependent directories, and then proposes appropriate accessibility measures and presents strategies for constructing such directories. The construction methods are based on efficient solutions to a new type of graph-covering problem. As an application, it is shown how to use a distance-dependent directory to implement a name-server component for a routing scheme.     

一种监测共享目录蠕虫病毒的方法

本文探讨了一种监测网络共享目录中的蠕虫病毒并确定其来源的方法，详细介绍了这种监测方法的编程实现。