Rename Layout in an external dwg file using autocad .net c#

[Anonymous]

Hello, 

I can rename a layout of an open file using the following code :

 static public void renamelayoutName(string last_name, string new_name)
        {

            Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;

            using (doc.LockDocument())
            {
                //get the Layout name

                bool bUpdate = false;

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

                    DBDictionary dLayouts = tr.GetObject(db.LayoutDictionaryId, OpenMode.ForRead) as DBDictionary;

                    if (dLayouts.Contains(last_name))
                    {

                        bUpdate = true;
                    }

                    tr.Commit();

                }

                if (bUpdate)
                {

                    LayoutManager acLayoutMgr = LayoutManager.Current;

                    acLayoutMgr.RenameLayout(last_name, new_name);

                    doc.Editor.Regen();

                }

                else
                {
                    ed.WriteMessage("No Layout with name " + last_name);

                }

            }
        }

I want to rename a layout of an external dwg file, how can I do it ? Thank you

[_gile · Accepted solution]

You have to set the side database as WorkingDatabase before calling LayoutManager.Current. Do not forget to reset the WorkingDatabase to the active document one.

Here's an extension method example.

    public static class Extension
    {
        public static void RenameLayout(this Database targetDb, string oldName, string newName)
        {
            var workingDb = HostApplicationServices.WorkingDatabase;
            try
            {
                HostApplicationServices.WorkingDatabase = targetDb;
                var layoutMgr = LayoutManager.Current;
                layoutMgr.RenameLayout(oldName, newName);
            }
            catch (System.Exception ex)
            {
                Application.ShowAlertDialog(ex.Message);
            }
            finally
            {
                HostApplicationServices.WorkingDatabase = workingDb;
            }
        }
    }

Calling example:

            using (var sideDb = new Database(false, true))
            {
                sideDb.ReadDwgFile(filename, FileOpenMode.OpenForReadAndAllShare, true, null);
                sideDb.RenameLayout(oldName, newName);
                sideDb.SaveAs(filename, DwgVersion.Current);
            }

[Anonymous]

This worked great, thank you so much!