Insert DWF underlay using .NET

By Augusto Goncalves

DWF underlays are represented by the DwfDefinition and DwfReference classes in the AutoCAD .NET API. Basically it is required to open the NOD (Named Object Dictionary) and get the DWF Definitions to create a new, so it can be used by the DWF Reference.

[CommandMethod("dwfInsert")]        static public void CommandInsertDWF()        {          // acess the database          Database db = Application.DocumentManager.            MdiActiveDocument.Database;                   // start the transaction          using (Transaction trans = db.TransactionManager.            StartTransaction())          {            // get the NOD            DBDictionary nod = trans.GetObject(              db.NamedObjectsDictionaryId,               OpenMode.ForWrite) as DBDictionary;                     // get the key for DWF Definition            string defDictKey =               UnderlayDefinition.GetDictionaryKey(              typeof(DwfDefinition));                     // if the dictionary is not there, create            if (!nod.Contains(defDictKey))            {              using (DBDictionary dict = new DBDictionary())              {                nod.SetAt(defDictKey, dict);                trans.AddNewlyCreatedDBObject(dict, true);              }            }                     // open the dictionary            ObjectId idDwfDef;            DBDictionary dwfDict = trans.GetObject(              nod.GetAt(defDictKey),              OpenMode.ForWrite) as DBDictionary;                     // create a new definition            using (DwfDefinition dwfDef = new DwfDefinition())            {              dwfDef.SourceFileName = "d:\kitchen.dwf";              idDwfDef = dwfDict.SetAt("kitchen", dwfDef);              trans.AddNewlyCreatedDBObject(dwfDef, true);            }                     // append to the model space            BlockTable bt = trans.GetObject(              db.BlockTableId, OpenMode.ForRead) as BlockTable;            BlockTableRecord btr = trans.GetObject(              bt[BlockTableRecord.ModelSpace],              OpenMode.ForWrite) as BlockTableRecord;            using (DwfReference dwf = new DwfReference())            {              dwf.DefinitionId = idDwfDef;              btr.AppendEntity(dwf);              trans.AddNewlyCreatedDBObject(dwf, true);            }            trans.Commit();          }        }