OBJECT ARX 遍历数据库所有图元代码

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1. typedef void (*DoSomethingWithEnt)( AcDbEntity*);
   
2. 
   
3. void WalkThrough(AcDbDatabase* db, DoSomethingWithEnt callBack)
   
4. {
   
5. AcDbBlockTable *pBlockTable;
   
6. db->getSymbolTable(pBlockTable, AcDb::kForRead);
   
7. AcDbBlockTableIterator* pBlockIt;
   
8. Acad::ErrorStatus es = pBlockTable->newIterator(pBlockIt);
   
9. if(Acad::eOk != es)
   
10. {
    
11. pBlockTable->close();
    
12. return;
    
13. }
    
14. AcDbBlockTableRecord *pBlockTableRecord;
    
15. for(pBlockIt->start();!pBlockIt->done();pBlockIt->step())
    
16. {
    
17. es = pBlockIt->getRecord(pBlockTableRecord, AcDb::kForRead);
    
18. if(Acad::eOk == es)
    
19. {
    
20. AcDbBlockTableRecordIterator* pEntIt;
    
21. es = pBlockTableRecord->newIterator(pEntIt);
    
22. if(Acad::eOk == es)
    
23. {
    
24. for (pEntIt->start();!pEntIt->done();pEntIt->step())
    
25. {
    
26. AcDbEntity* pEnt;
    
27. es = pEntIt->getEntity(pEnt, AcDb::kForWrite);
    
28. if (Acad::eOk == es)
    
29. {
    
30. callBack(pEnt);
    
31. pEnt->close();
    
32. }
    
33. }
    
34. delete pEntIt;
    
35. }
    
36. pBlockTableRecord->close();
    
37. }
    
38. }
    
39. delete pBlockIt;
    
40. pBlockTable->close();
    
41. }

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