集合--purge函数

admin1

cad.exe已输出了了两个purge函数，只是没在头文件中列出来：
Acad::ErrorStatus purgeDatabase(AcDbDatabase *pDb);
Acad::ErrorStatus purgeObjectsFromDatabase(AcDbDatabase *pDb,const AcDbObjectIdArray &Objs);
用之前声明一下就可以了，它们从acad.lib中输入，几乎所有版本的cad都有。[code]acdbDatabase::purge()
void PurgeBlock(AcDbDatabase *pDb)
{
AcDbBlockTable *pBlockTable;
pDb->getSymbolTable(pBlockTable, AcDb::kForRead);
AcDbBlockTableRecord *pBlockTableRecord;
pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord,
AcDb::kForWrite);
pBlockTable->close();
AcDbBlockTableRecordIterator *pBlkRcdItr; //块表记录浏览器
pBlockTableRecord->newIterator(pBlkRcdItr);
AcDbObjectId id;
AcDbObjectIdArray idArr;
for(pBlkRcdItr->start();!pBlkRcdItr->done();pBlkRcdItr->step())
{
pBlkRcdItr->getEntityId(id);
idArr.append(id); //向数组添加实体
}
pDb->purge(idArr); //清理垃圾
pBlockTableRecord->close();
delete pBlkRcdItr;
}[/code]