how to know current drawing is don't have any xref.

[RamanSBV]

Hi,

How to know current drawing is don't have any xref

Regards,

Raman

[kdub_nz · Accepted solution]

Try here

http://www.theswamp.org/index.php?topic=22884.msg275290#msg275290

but long story short :

            Document doc = acadApp.DocumentManager.MdiActiveDocument;

            Database db = doc.Database;

            Editor ed = doc.Editor;

            // Get the xref graph for the current dbase...

            XrefGraph xrefGraph = db.GetHostDwgXrefGraph(true);
            if (xrefGraph == null || xrefGraph.IsEmpty || xrefGraph.NumNodes == 1)
            {
                ed.WriteMessage("\nNo xrefs found.");
                return; 
            }

[Hallex · Accepted solution]

      You may want to loop through BlockTable and check  

     all BlockTableRecord on properties:  

    IsFromExternalReference or IsFromOverlayReference  

    Not tested, just was written in notepad

        [CommandMethod("xrf")]     

    public static void testXref()    

     {    

         bool whatabout = XrefIncluded();     

        Autodesk.AutoCAD.ApplicationServices.Application.ShowAlertDialog(string.Format("Xref?\t{0}", 

whatabout));       

  }     

    public static bool XrefIncluded()    

     {   

          bool include = false;    

         Document doc = Application.DocumentManager.MdiActiveDocument;     

        Database db = doc.Database;     

                   using (Transaction tr = db.TransactionManager.StartTransaction())     

        {       

          BlockTable bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;    

          foreach (ObjectId id in bt)          

    {    

             BlockTableRecord btr = tr.GetObject(id, OpenMode.ForRead, false) as BlockTableRecord;    

             // check if Xref        

         if (btr.IsFromExternalReference || btr.IsFromOverlayReference)        

         {                

     include= true;   

                  break;     

            }   

           }     

            tr.Commit();  

           }  

           return include;    

     }