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C3D-0105 · Move everything on SS- layers to layer 0 [SS-TO-ZERO] done

Moves every entity on any SS- prefixed layer to layer 0 across model space, paper space and block definitions. Frozen and locked SS- layers are thawed first so nothing is skipped. The layers themselves are kept; nothing is erased. Verifies no entities remain on an SS- layer.

C# payload

// Move every entity on an SS-* layer to layer 0.
// Covers model space, paper space and block definitions. The SS- layers themselves are left in
// place (empty) - nothing is erased.
var lt = (LayerTable)Tx.GetObject(Db.LayerTableId, OpenMode.ForRead);
var bt = (BlockTable)Tx.GetObject(Db.BlockTableId, OpenMode.ForRead);
Log("drawing: " + Db.Filename);

var ss = new HashSet<string>();
foreach (ObjectId lid in lt) {
    var l = (LayerTableRecord)Tx.GetObject(lid, OpenMode.ForRead);
    if (l.Name.ToUpper().StartsWith("SS-")) ss.Add(l.Name);
}
Log("SS- layers: " + ss.Count);
foreach (var n in ss) Log("   " + n);

// thaw/unlock so the move cannot silently skip anything
foreach (string nm in ss) {
    var l = (LayerTableRecord)Tx.GetObject(lt[nm], OpenMode.ForWrite);
    if (l.IsFrozen) l.IsFrozen = false;
    if (l.IsLocked) l.IsLocked = false;
    if (l.IsOff)    l.IsOff = false;
}

var moved = new Dictionary<string,int>();
int total = 0;
foreach (ObjectId btrId in bt) {
    var btr = (BlockTableRecord)Tx.GetObject(btrId, OpenMode.ForRead);
    foreach (ObjectId id in btr) {
        Autodesk.AutoCAD.DatabaseServices.DBObject o;
        try { o = Tx.GetObject(id, OpenMode.ForRead); } catch { continue; }
        var ent = o as Autodesk.AutoCAD.DatabaseServices.Entity;
        if (ent == null) continue;
        string lay; try { lay = ent.Layer; } catch { continue; }
        if (!ss.Contains(lay)) continue;

        try {
            var w = (Autodesk.AutoCAD.DatabaseServices.Entity)Tx.GetObject(id, OpenMode.ForWrite);
            w.Layer = "0";
            if (!moved.ContainsKey(lay)) moved[lay] = 0;
            moved[lay]++;
            total++;
        } catch (System.Exception ex) { Log("  could not move " + id.Handle + ": " + ex.Message); }
    }
}

Log("");
foreach (var kv in moved) Log("  " + kv.Key + " -> 0 : " + kv.Value);
Log("entities moved to layer 0: " + total);

// verify nothing is left on any SS- layer
int leftover = 0;
foreach (ObjectId btrId in bt) {
    var btr = (BlockTableRecord)Tx.GetObject(btrId, OpenMode.ForRead);
    foreach (ObjectId id in btr) {
        Autodesk.AutoCAD.DatabaseServices.DBObject o;
        try { o = Tx.GetObject(id, OpenMode.ForRead); } catch { continue; }
        var ent = o as Autodesk.AutoCAD.DatabaseServices.Entity;
        if (ent == null) continue;
        try { if (ss.Contains(ent.Layer)) leftover++; } catch { }
    }
}
Log("entities still on an SS- layer: " + leftover + " (verified)");
Ed.Regen();

Result

drawing: C:\Users\sanja\OneDrive\_SurveyDisco\260613 - 5030 E Lake Pkwy, Stockbridge, GA 30281, USA\ACAD-260612 - CSTORE WATER ABS 30.dwg
SS- layers: 5
   SS-ROAD-STRIPE
   SS-ROAD-SIDEWALK
   SS-ROAD-BUILDING
   SS-ROAD-DUMPSTER
   SS-ROAD-CANOPY

  SS-ROAD-SIDEWALK -> 0 : 2
  SS-ROAD-BUILDING -> 0 : 1
  SS-ROAD-DUMPSTER -> 0 : 1
  SS-ROAD-CANOPY -> 0 : 1
  SS-ROAD-STRIPE -> 0 : 40
entities moved to layer 0: 45
entities still on an SS- layer: 0 (verified)