List DWF underlay definitions in the drawing

By Virupaksha Aithal

Each DWF underlay definitions are stored in the named object Dictionary under Dictionary name "ACAD_DWFDEFINITIONS". Below code shows the procedure to go through the "ACAD_DWFDEFINITIONS" Dictionary and listing all the DWF definitions.

[CommandMethod("DWFUnderlayList")]

static public void DWFUnderlayList()

{

    Document doc = Application.DocumentManager.MdiActiveDocument;

    Database db = doc.Database;

    Editor ed = doc.Editor;

 

    using (Transaction tr =

                    db.TransactionManager.StartTransaction())

    {

        DBDictionary nod = (DBDictionary)tr.GetObject(

                db.NamedObjectsDictionaryId, OpenMode.ForRead);

 

        string defDictKey = UnderlayDefinition.GetDictionaryKey(

                                            typeof(DwfDefinition));

 

        if (nod.Contains(defDictKey))

        {

            DBDictionary dwfDict =

                        (DBDictionary)tr.GetObject(

                           nod.GetAt(defDictKey), OpenMode.ForRead);

 

            foreach (DBDictionaryEntry entry in dwfDict)

            {

                DwfDefinition dwfDef = (DwfDefinition)tr.GetObject(

                                    entry.Value, OpenMode.ForRead);

 

                ed.WriteMessage(dwfDef.ActiveFileName + "\n");

            }

        }

        else

        {

            ed.WriteMessage("No DWF underlay in the drawing file\n");

        }

 

        tr.Commit();

    }

}