枚举CAD图层

//枚举图层
Acad::ErrorStatus EnumAllLayer(AcDbObjectIdArray& layeIds,AcDbDatabase* pDb=acdbHostApplicationServices()->workingDatabase())
{
 if(pDb==NULL)
  return Acad::eNullPtr;
 AcDbLayerTable *pLayerTable=NULL;
 Acad::ErrorStatus es=Acad::eOk;
 if((es=pDb->getSymbolTable(pLayerTable,AcDb::kForRead))!=Acad::eOk)
 {
  pLayerTable->close();
  return es;
 }
 //创建一个层表迭代器
 AcDbLayerTableIterator *pLayerTableIterator;
 if ( (es =pLayerTable->newIterator (pLayerTableIterator) ) != Acad::eOk )
 {
  pLayerTable->close () ;
  return es;
 }

 //取得图层
 for(pLayerTableIterator->start ();!pLayerTableIterator->done();pLayerTableIterator->step())
 {
  AcDbObjectId id;
  es=pLayerTableIterator->getRecordId(id);
  if(es!=Acad::eOk)
   continue;
  layeIds.append(id);
 }
 //删除层表迭代器
 delete pLayerTableIterator;
 pLayerTableIterator=NULL;
 //关闭层表(切记)
 pLayerTable->close () ;
 return Acad::eOk;

}
//枚举图层
Acad::ErrorStatus EnumAllLayer(CStringArray& layeNames,AcDbDatabase* pDb=acdbHostApplicationServices()->workingDatabase())
{
 if(pDb==NULL)
  return Acad::eNullPtr;
 AcDbLayerTable *pLayerTable=NULL;
 Acad::ErrorStatus es=Acad::eOk;
 if((es=pDb->getSymbolTable(pLayerTable,AcDb::kForRead))!=Acad::eOk)
 {
  pLayerTable->close();
  return es;
 }
 //创建一个层表迭代器
 AcDbLayerTableIterator *pLayerTableIterator;
 if ( (es =pLayerTable->newIterator (pLayerTableIterator) ) != Acad::eOk )
 {
  pLayerTable->close () ;
  return es;
 }

 //取得图层
 for(pLayerTableIterator->start ();!pLayerTableIterator->done();pLayerTableIterator->step())
 {
  AcDbLayerTableRecord *pLayerTableRecord=NULL;
  es=pLayerTableIterator->getRecord(pLayerTableRecord,AcDb::kForRead);
  if(es!=Acad::eOk)
   continue;
  const ACHAR* pName=NULL;
  es=pLayerTableRecord->getName(pName);
  if(es!=Acad::eOk)
  {
   pLayerTableRecord->close();
   continue;
  }
  CString strName=pName;
  layeNames.Add(strName);
  //关闭(切记)
  pLayerTableRecord->close();
 }
 //删除层表迭代器
 delete pLayerTableIterator;
 pLayerTableIterator=NULL;
 //关闭层表(切记)
 pLayerTable->close () ;
 return Acad::eOk;

}