[ARX程序]：求助，删除无用层问题

yinyan168

求助，我要保留指定图层，删除其他所以图层的时候（已经把其他图层上的所以实体删除）。为什么es返回Adesk::eInvalidOpenState

AcDbLayerTable * pLayerTbl;//定义层表指针
acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pLayerTbl, AcDb::kForWrite);
AcDbLayerTableRecord * pLayerTblRcd; //定义层表记录指针
AcDbLayerTableIterator *pLayerTblIterator;
pLayerTbl->newIterator(pLayerTblIterator);
for(;!pLayerTblIterator->done();pLayerTblIterator->step())
{
pLayerTblIterator->getRecord(pLayerTblRcd,AcDb::kForRead);
pLayerTblRcd->getName(pLayerName);
if((strcmp(pLayerName,pLayerName1)!=0)
&&(strcmp(pLayerName,pLayerName2)!=0)
&&(strcmp(pLayerName,pLayerName3)!=0)
&&(strcmp(pLayerName,pLayerName4)!=0)
&&(strcmp(pLayerName,pLayerName5)!=0)
&&(strcmp(pLayerName,"0")!=0)){
pLayerTblRcd->close();
es=pLayerTblRcd->upgradeOpen();//es在删除最后一个图层的时候返回eInvalidOpenState
pLayerTblRcd->erase(true);//删除图层
pLayerTblRcd->close();
}
}
acutDelString(pLayerName);
delete pLayerTableIterator;
pLayerTblRcd->close();
pLayerTbl->close();

suave

如果你要删的层是当前层，即使是空的也是不能删除的

swgzj

是怎么回事啊