[求助]：关于AcDbHatch的问题

冰斌

在填充中我采用IDS形式：appendLoop(Adesk::Int32 loopType,const AcDbObjectIdArray& dbObjIds)，可我删除边界对象后，不成功，但我必须要删除，怎么办？请求高手指点!!!代码如下：
AcDbBlockTable *pBlockTable;
        acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable,AcDb::kForRead);
        AcDbBlockTableRecord *pBlockTableRecord;
        pBlockTable->getAt(ACDB_MODEL_SPACE,pBlockTableRecord,AcDb::kForWrite);
        pBlockTable->close();
       
        AcDbObjectIdArray objIds;
       
        AcDbHatch* pHatch = new AcDbHatch();
       
        AcGeVector3d normal(0.0, 0.0, 1.0);
        pHatch->setNormal(normal);
        pHatch->setElevation(0.0);
        pHatch->setAssociative(Adesk::kFalse);
       
        pHatch->setPattern(AcDbHatch::kPreDefined, "SOLID");
       
        pHatch->setHatchStyle(AcDbHatch::kNormal);
       
        AcGePoint3dArray points;
       
        AcGePoint3d start(0,0,0);
        AcGePoint3d end(0,2,0);
       
        points.append(start);
        points.append(end);
        end.set(2,2,0);
        points.append(end);
       
        AcDbSpline *newspline=new AcDbSpline(points);
        AcDbObjectId newsplineID;
        pBlockTableRecord->appendAcDbEntity(newsplineID,newspline);
       
        objIds.append(newsplineID);
        //newspline->erase();//加上此句不成功
        newspline->close();
       
        start.set(2,2,0);
        end.set(0,0,0);
        AcDbLine *line3=new AcDbLine(start,end);
        AcDbObjectId line3ID;
        pBlockTableRecord->appendAcDbEntity(line3ID,line3);
       
        objIds.append(line3ID);
        //line3->erase();//加上此句不成功
        line3->close();
       
        pHatch->appendLoop(AcDbHatch::kExternal, objIds);
       
        pHatch->evaluateHatch();
       
        pBlockTableRecord->appendAcDbEntity(pHatch);
        pBlockTableRecord->close();
        pHatch->close();