Change Linetype Descriptions

Linetypes can have a description associated with them. The description provides an ASCII representation of the linetype. You can assign or change a linetype description by using the AsciiDescription property.

A linetype description can have up to 47 characters. The description can be a comment or a series of underscores, dots, dashes, and spaces to show a simple representation of the linetype pattern.

Change the description of a linetype

The following example changes the description of the current linetype.

VB.NET

Imports Autodesk.AutoCAD.Runtime

Imports Autodesk.AutoCAD.ApplicationServices

Imports Autodesk.AutoCAD.DatabaseServices

<CommandMethod("ChangeLinetypeDescription")> _

Public Sub ChangeLinetypeDescription()

  '' Get the current document and database

  Dim acDoc As Document = Application.DocumentManager.MdiActiveDocument

  Dim acCurDb As Database = acDoc.Database

  '' Start a transaction

  Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction()

      '' Open the Linetype table record of the current linetype for write

      Dim acLineTypTblRec As LinetypeTableRecord

      acLineTypTblRec = acTrans.GetObject(acCurDb.Celtype, _

                                          OpenMode.ForWrite)

      '' Change the description of the current linetype

      acLineTypTblRec.AsciiDescription = "Exterior Wall"

      '' Save the changes and dispose of the transaction

      acTrans.Commit()

  End Using

End Sub

using Autodesk.AutoCAD.Runtime;

using Autodesk.AutoCAD.ApplicationServices;

using Autodesk.AutoCAD.DatabaseServices;

[CommandMethod("ChangeLinetypeDescription")]

public static void ChangeLinetypeDescription()

  // Get the current document and database

  Document acDoc = Application.DocumentManager.MdiActiveDocument;

  Database acCurDb = acDoc.Database;

  // Start a transaction

  using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())

      // Open the Linetype table record of the current linetype for write

      LinetypeTableRecord acLineTypTblRec;

      acLineTypTblRec = acTrans.GetObject(acCurDb.Celtype,

                                          OpenMode.ForWrite) as LinetypeTableRecord;

      // Change the description of the current linetype

      acLineTypTblRec.AsciiDescription = "Exterior Wall";

      // Save the changes and dispose of the transaction

      acTrans.Commit();

VBA/ActiveX Code Reference