.NET

[#1]

Hi, I am trying to add an entity on a new drawing (document) with a new layer.

Following is the code snippet I have right now.

        [CommandMethod("TEST")]
        public void Test()
        {
            Document newDoc = Application.DocumentManager.Add("acad");
            Database db = newDoc.Database;
            DocumentLock docLock = newDoc.LockDocument();

            try
            {
                using (Transaction tr = db.TransactionManager.StartTransaction())
                {
                    BlockTable bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead)
                                    as BlockTable;
                    BlockTableRecord btr = tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite)
                                    as BlockTableRecord;

                    DBPoint p = new DBPoint(new Point3d(0, 0, 0));
                    string newLayer = PTPUtils.CreateLayer(db, "NewLayer", 3);
                    p.Layer = newLayer;

                    btr.AppendEntity(p);
                    tr.AddNewlyCreatedDBObject(p, true);

                    tr.Commit();
                }
            }
            catch (Autodesk.AutoCAD.Runtime.Exception e)
            {
                Application.ShowAlertDialog(e.Message);
            }

            docLock.Dispose();
            Application.DocumentManager.MdiActiveDocument = newDoc;
        }

PTPUtils.CreateLayer() method creates a new layer in the given DB.

However, the code gives me an "eKeyNotFound" exception in the line p.Layer = newLayer.

If I remove the p.Layer line, the code works very well. But the entity only goes to the default layer "0".

How could I solve this?

Thank you in advance.

DynamicScope.

FYI,

ObjectARX 2010 (C#)

VS 2008

[#2 · Accepted solution]

Hi,

There is no database attached to the new created DBPoint entity (derived from DBObject that has Database property), so it throws eKeyNotFound error when you try to set its layer (that requires database to store).

You just swap the code, append the entity to Model Space first (this will attach database to this entity), then change its layer later. You code can be rewritten as:

public void AddNewLayerTest()
{
    Document newDoc = Application.DocumentManager.Add("acad");
    Database db = newDoc.Database;
    DocumentLock docLock = newDoc.LockDocument();

    try
    {
        using (Transaction tr = db.TransactionManager.StartTransaction())
        {
            BlockTable bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead)
                            as BlockTable;
            BlockTableRecord btr = tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite)
                            as BlockTableRecord;

            DBPoint p = new DBPoint(new Point3d(0, 0, 0));

            btr.AppendEntity(p);
            tr.AddNewlyCreatedDBObject(p, true);

            string layerName = "NewLayer";
            PTPUtils.CreateLayer(db, layerName, 3);
            p.Layer = layerName;

            tr.Commit();
        }
    }
    catch (Autodesk.AutoCAD.Runtime.Exception e)
    {
        Application.ShowAlertDialog(e.Message);
    }

    docLock.Dispose();
    Application.DocumentManager.MdiActiveDocument = newDoc;
}

-Khoa