Linetype Definition Inside a DWG

[GTVic]

Is it possible to examine the linetype definition stored in a drawing. I would like to update linetypes that use an old SHX file with newer definitions but because the name of the linetype can change (RENAME or XREF merging) the only way to reliably do this is to look at the definition (e.g. A,7.25,[LINE5,old.shx],9.25,-5) of a linetype and update it (e.g. A,7.25,[LINE5,new.shx],9.25,-5). Is this possible with .NET or LSP?

Thanks

[Jeffrey_H · Accepted solution]

I am sure you figure which property to use to check against

        <CommandMethod("LineTypeDefs")> _
        Public Sub LineTypeDefs()
            Dim doc As Document = Application.DocumentManager.MdiActiveDocument
            Dim ed As Editor = doc.Editor
            Dim db As Database = doc.Database
 
 
            Using trx As Transaction = db.TransactionManager.StartTransaction()
                Dim lineTble As LinetypeTable = trx.GetObject(db.LinetypeTableId, OpenMode.ForRead)
 
                For Each lineTypeId As ObjectId In lineTble
                    Dim lineTblRcd As LinetypeTableRecord = trx.GetObject(lineTypeId, OpenMode.ForRead)
                    ed.WriteMessage("{3}{0}{3}     {1}{3}     {2}{3}",
                                    lineTblRcd.Name, lineTblRcd.AsciiDescription, lineTblRcd.Comments, vbCrLf)
                Next
                trx.Commit()
            End Using
 
        End Sub

   [CommandMethod("LineTypeDefs")]
        public void LineTypeDefs()
        {
            Document doc = Application.DocumentManager.MdiActiveDocument; // Active Document
            Editor ed = doc.Editor; // Active Document's Editor
            Database db = doc.Database; // Active Document Database
           
         
 
            using (Transaction trx = db.TransactionManager.StartTransaction())
            {
                LinetypeTable lineTble = (LinetypeTable)trx.GetObject(db.LinetypeTableId, OpenMode.ForRead);
 
                foreach (ObjectId lineTypeId in lineTble)
                {
                    LinetypeTableRecord lineTblRcd = (LinetypeTableRecord)trx.GetObject(lineTypeId, OpenMode.ForRead);
                    ed.WriteMessage("\n{0}\n      {1}\n        {2}", lineTblRcd.Name, lineTblRcd.AsciiDescription, lineTblRcd.Comments);
                }
                trx.Commit();
            }       
 
        }

[GTVic]

Thank you very much. I'm hoping AsciiDescription will be writeable, that would make it easy to update the definition.