ObjectARX2010 学习笔记002：读取已经存在的DWG文件中的内容

    static void swtArxProject5readdwg(void)
    {
        // Add your code for command swtArxProject5.readdwg here
        //打开测试文件test.dwg
        AcDbDatabase *pDb=new AcDbDatabase(Adesk::kFalse);
        pDb->readDwgFile(_T("c:/test.dwg"));
        //获取块表
        AcDbBlockTable *pBlkTbl;
        pDb->getSymbolTable(pBlkTbl,AcDb::kForRead);
        //获取块表记录
        AcDbBlockTableRecord *pBlkRcd;
        pBlkTbl->getAt(ACDB_MODEL_SPACE,pBlkRcd,AcDb::kForWrite);
        pBlkTbl->close();
        //建立迭代器准备进行循环
        AcDbBlockTableRecordIterator *pBlkTblRcdltr;
        pBlkRcd->newIterator(pBlkTblRcdltr);
        //定义实体指针
        AcDbEntity *pEnt;
        //在读入的块表记录中进行迭代
        for (pBlkTblRcdltr->start();!pBlkTblRcdltr->done();pBlkTblRcdltr->step())
        {
            //读取实体
            pBlkTblRcdltr->getEntity(pEnt,AcDb::kForRead);
            //pEnt=pBlkTblRcdltr->getEntity(AcDb::kForRead);
            //获取实体类型
            acutPrintf(_T("
实体类型：%s"),pEnt->isA()->name());
            //关闭实体指针
            pEnt->close();
        }
        //关闭块表
        pBlkRcd->close();
        //删除块表记录迭代器
        delete pBlkTblRcdltr;
        //删除图形
        delete pDb;
    }