图形关联信息的数据库查询及其应用

直接在AutoCAD中实现图形关联信息的数据库查询，既节省诸如MAPINFO，AUTOMAP等软件的购置费，又减少用户的学习负担。通过ActiveXutomation技术，利用VB6．0在AutoCAD下进行二次开发实现了图形关联信息的数据库查询，首先由用户对现有图形构造选择集，形成图形块，将相关查询关键词作为该图形块的块名赋予该图形块，在进行图形查询时，用户点击某个图形块，从图形块中取得图形块名，将块名作为查询关键词，对数据库进行查询后显示数据库查询结构，着重介绍了此方法的实现过程以及在供电部门接线图的设备查询方面的应用。

Database Queries of Drawing's Associated Information and Its Application

AutoCAD is a plotting tool familiarized and often used. If the database information associated with the graph can be directly found in AutoCAD, It will not only save cost when the user does not purchase softwares such as Mapinfo,Automap etc., but also lighten the user's learning burden. This method has been realized by using ActiveX Automation technique and VB6.0. Firstly, a selection set of current entity graph is constructed to form a block, and the block is named by the associated searching keyword. Secondly,when searching database information associated with the graph, users can click this block and get this block name and the searching result will be displayed by using the block name as the searching keyword. The above implementation method is discussed and some key source codes is given in this paper. A application example to search the devices information in power supply departments' hookup is also given.