Issue with Handle References in Copied Polylines in AutoCAD Plugin

[santhoshr151194]

Problem Statement:
In my AutoCAD plugin, I associate a text entity with a polyline by storing the text’s handle value inside the polyline’s extension dictionary. This allows me to retrieve the associated text later using the stored handle.

However, when I copy and paste the polyline along with the text, AutoCAD generates new handle values for both the polyline and the text. The problem is that the copied polyline’s extension dictionary still contains the original text’s handle value, instead of the newly generated handle for the pasted text.

Expected Behavior:
When a polyline is copied and pasted along with its associated text, the newly created polyline should store the handle of the newly created text entity in its extension dictionary, rather than retaining the old (source) text handle.

Question:
How can I update the pasted polyline’s extension dictionary to store the new text handle instead of the original one? Is there an event or mechanism in AutoCAD’s API that allows updating handle references for copied entities?

Would appreciate any insights or suggestions!

[_gile]

Hi,

Instead of storing the text Handle in the Xrecord, you should store the text ObjectId as SoftPointer.

Here's a simple example:

[CommandMethod("TEST")]
public static void Test()
{
    var doc = Application.DocumentManager.MdiActiveDocument;
    var db = doc.Database;
    var ed = doc.Editor;
    using (var tr = db.TransactionManager.StartTransaction())
    {
        var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
        var line = new Line(Point3d.Origin, new Point3d(10.0, 0.0, 0.0));
        curSpace.AppendEntity(line);
        tr.AddNewlyCreatedDBObject(line, true);
        var text = new DBText()
        {
            Position = new Point3d(10.0, 0.0, 0.0),
            TextString = "Some text"
        };
        var textId = curSpace.AppendEntity(text);
        tr.AddNewlyCreatedDBObject(text, true);
        if (line.ExtensionDictionary.IsNull)
            line.CreateExtensionDictionary();
        var extDict = (DBDictionary)tr.GetObject(line.ExtensionDictionary, OpenMode.ForWrite);
        var xrecord = new Xrecord();
        xrecord.Data = new ResultBuffer(new TypedValue(330, textId));
        extDict.SetAt("LinkedText", xrecord);
        tr.AddNewlyCreatedDBObject(xrecord, true);
        tr.Commit();
    }
}

[_gile]

And a testing method for the previous example.

[CommandMethod("TEST2")]
public static void Test2()
{
    var doc = Application.DocumentManager.MdiActiveDocument;
    var db = doc.Database;
    var ed = doc.Editor;
    var peo = new PromptEntityOptions("\nSelect line: ");
    peo.SetRejectMessage("\nSelected object is not a Line.");
    peo.AddAllowedClass(typeof(Line), true);
    var per = ed.GetEntity(peo);
    if (per.Status != PromptStatus.OK) return;
    using (var tr = db.TransactionManager.StartTransaction())
    {
        var line = (Line)tr.GetObject(per.ObjectId, OpenMode.ForRead);
        if (line.ExtensionDictionary.IsNull)
            return;
        var xDict = (DBDictionary)tr.GetObject(line.ExtensionDictionary, OpenMode.ForRead);
        if (!xDict.Contains("LinkedText"))
            return;
        var xrec = (Xrecord)tr.GetObject(xDict.GetAt("LinkedText"), OpenMode.ForRead);
        var id = (ObjectId)xrec.Data.AsArray()[0].Value;
        ed.SetImpliedSelection(new[] { id });
        tr.Commit();
    }
}

[ActivistInvestor]

You should also set the Xrecord's XlateReferences property to true.

Also test with COPYCLIP & PASTECLIP