Creating a anonymous Layer

By Virupaksha Aithal

To create anonymous Layer, you need to call “AcDbLayerTable::setIsHidden()” API as shown in below code. Anonymous layers are not shown in layer manager and hence users can not edit/delete the setting of anonymous layers.

void CreateAnonymousLayer()
{
    AcDbObjectId layerId = AcDbObjectId::kNull;
    AcDbLayerTable* lTable = NULL;
 
    AcDbDatabase *pDb = acdbHostApplicationServices()->
                                        workingDatabase();
 
    Acad::ErrorStatus es = 
                pDb->getSymbolTable(lTable, AcDb::kForWrite);
 
    if(Acad::eOk == es && lTable)
    {
          AcDbLayerTableRecord* lTblRec = 
                new AcDbLayerTableRecord();
          lTblRec->setName(ACRX_T("TEST"));
 
          lTblRec->setIsHidden(true);
 
          if (lTable->add(layerId, lTblRec) != Acad::eOk)
              ::acutPrintf(_T("ERROR Creating Layern"));
          else
            lTblRec->close();
 
          lTable->close();
    }
 
}
.NET

[CommandMethod("Hiddenlayer")]
public void Hiddenlayer()
{
 Document doc = Application.DocumentManager.MdiActiveDocument;
 Database db = doc.Database;
 Editor ed = doc.Editor;
 
 using (Transaction tr =
        db.TransactionManager.StartTransaction())
 {
     LayerTable table =
     tr.GetObject(db.LayerTableId, OpenMode.ForWrite) as LayerTable;
 
     LayerTableRecord Anonymous = new LayerTableRecord();
     Anonymous.Name = "Test";
     Anonymous.IsHidden = true;
 
 
     table.Add(Anonymous);
     tr.AddNewlyCreatedDBObject(Anonymous, true);
     tr.Commit();
 
 }
}