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C3D-TB1READ · Read orphaned TB1 lines (read-only) done

Endpoints of the 2 TB1 lines above the landscape paper.

C# payload

// READ-ONLY: what are the 2 TB1 lines up at Y~16.5 (above the landscape paper)? Endpoints + length.
using System;
using Autodesk.AutoCAD.DatabaseServices;

var db = Db;
using (var tr = db.TransactionManager.StartTransaction())
{
    var ld = (DBDictionary)tr.GetObject(db.LayoutDictionaryId, OpenMode.ForRead);
    Layout lay = null;
    foreach (DBDictionaryEntry e in ld)
    {
        var l = (Layout)tr.GetObject(e.Value, OpenMode.ForRead);
        if (string.Equals(l.LayoutName, "11X17", StringComparison.OrdinalIgnoreCase)) { lay = l; break; }
    }
    var btr = (BlockTableRecord)tr.GetObject(lay.BlockTableRecordId, OpenMode.ForRead);
    foreach (ObjectId id in btr)
    {
        var e = tr.GetObject(id, OpenMode.ForRead) as Autodesk.AutoCAD.DatabaseServices.Entity;
        if (e == null || !string.Equals(e.Layer, "TB1", StringComparison.OrdinalIgnoreCase)) continue;
        if (e is Line ln)
            Log($"TB1 Line ({ln.StartPoint.X:0.00},{ln.StartPoint.Y:0.00})->({ln.EndPoint.X:0.00},{ln.EndPoint.Y:0.00}) len={ln.Length:0.00} h={e.Handle}");
        else
            Log($"TB1 {e.GetType().Name} h={e.Handle}");
    }
    tr.Commit();
}

Result

TB1 Line (5.45,0.14)->(16.02,0.14) len=10.57 h=1C64
TB1 Line (5.43,16.52)->(5.45,0.14) len=16.37 h=1D56