Topic: BlockTableRecord.IsFromExternalReference always false?

[sinc]

For some reason, every call to IsFromExternalReference is returning false, even when the BlockTableRecord is an XREF.

Has anyone ever seen this?  I'm sure this used to work, but it's not working for me now...

[Kerry]

This works for me Sinc ...

Command: _XATTACH
Overlay Xref "SECT-HEAD-1R": F:\_kdub_testing\Dwgs\SECT-HEAD-1R.dwg
"SECT-HEAD-1R" loaded.

Command: _XATTACH
Overlay Xref "Alphabet Soup": F:\_kdub_testing\nest-0\Alphabet Soup.dwg
"Alphabet Soup" loaded.

Command: ListXrefs

Found XREF : SECT-HEAD-1R
Found XREF : Alphabet Soup

Code: [Select]

[CommandMethod("ListXrefs")]
public static void ListXrefs()
{
    Database db = HostApplicationServices.WorkingDatabase;
    Document doc = AcadApp.DocumentManager.MdiActiveDocument;
    Editor ed = doc.Editor;

    using (Transaction tr = db.TransactionManager.StartTransaction())
    {
        BlockTable bt = tr.GetObject(
            db.BlockTableId, OpenMode.ForRead) as BlockTable;

        BlockTableRecord btr = tr.GetObject(
            bt[BlockTableRecord.ModelSpace], OpenMode.ForRead) as BlockTableRecord;

        foreach (ObjectId objId in btr)
        {
            DBObject dbObj = tr.GetObject(
                objId, OpenMode.ForRead);

            BlockReference blkRef = dbObj as BlockReference;
            if (blkRef != null)
            {
                BlockTableRecord blkTblRecord = tr.GetObject(
                    blkRef.BlockTableRecord, OpenMode.ForRead) as BlockTableRecord;
                if (blkTblRecord.IsFromExternalReference == true)
                {
                    ed.WriteMessage("\nFound XREF : " + blkTblRecord.Name);
                }
            }
        }               
        tr.Commit();
    }
}


[sinc]

Thanks, Kerry.

I was being brain-dead.  Well, I when I was working on this last night, it was around midnight, after two days of Christmas celebrations.  Probably not the best time to be coding. 

I had my BlockReference (br), and I was trying to do this:

Code: [Select]

BlockTableRecord btr = tr.GetObject(br.OwnerId, OpenMode.ForRead, false) as BlockTableRecord;
instead of this:

Code: [Select]

BlockTableRecord btr = tr.GetObject(br.BlockTableRecord, OpenMode.ForRead, false) as BlockTableRecord;
After I fixed that, everything is happy again.

I knew I had been using this and everything was OK, so I couldn't figure out what was going wrong.  But I was in one of those modes where I was looking all around the problem without seeing it.  Got it now, though.  Thanks!

[Kerry]

....................   But I was in one of those modes where I was looking all around the problem without seeing it.  .............

I can't imagine anyone who couldn't honestly say the same ..