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C3D-260619-HEROPARENT · What are the HERO/TRACT entities attached to done

Read-only: entity types on the HERO/TRACT layers and, for Civil 3D labels, the parent object and its layer; plus parcels/sites and what sits on C-PROP-LINE.

C# payload

// READ-ONLY: identify the HERO/TRACT entities and what they are attached to.
// Civil 3D labels follow their PARENT object's visibility - if the parcel segments are on
// C-PROP-LINE, turning that layer off hides the labels no matter what layer the labels are on.
var ms = (BlockTableRecord)Tx.GetObject(SymbolUtilityServices.GetBlockModelSpaceId(Db), OpenMode.ForRead);
bool IsHero(string s) { var u = s.ToUpper(); return u.Contains("HERO") || u.Contains("TRACT"); }

Log("--- HERO/TRACT entities: what ARE they? ---");
foreach (ObjectId id in ms)
{
    var e = Tx.GetObject(id, OpenMode.ForRead) as Autodesk.AutoCAD.DatabaseServices.Entity;
    if (e == null || !IsHero(e.Layer)) continue;
    string extra = "";
    var lbl = e as Autodesk.Civil.DatabaseServices.Label;
    if (lbl != null)
    {
        try {
            var pid = lbl.FeatureId;
            if (!pid.IsNull) {
                var pe = Tx.GetObject(pid, OpenMode.ForRead) as Autodesk.AutoCAD.DatabaseServices.Entity;
                extra = "  PARENT=" + (pe == null ? "?" : pe.GetType().Name + " on layer '" + pe.Layer + "'");
            } else extra = "  PARENT=none";
        } catch (System.Exception ex) { extra = "  (parent: " + ex.Message + ")"; }
    }
    Log("  " + e.GetType().Name + " h=" + e.Handle + " layer='" + e.Layer + "'" + extra);
}

Log("--- parcels / sites and their layers ---");
var cdoc = CivilDoc;
foreach (ObjectId sid in cdoc.GetSiteIds())
{
    var site = Tx.GetObject(sid, OpenMode.ForRead) as Site;
    if (site == null) continue;
    Log("  Site '" + site.Name + "'");
    foreach (ObjectId pid in site.GetParcelIds())
    {
        var p = Tx.GetObject(pid, OpenMode.ForRead) as Parcel;
        if (p == null) continue;
        Log("      Parcel '" + p.Name + "' layer='" + p.Layer + "' area=" + p.Area.ToString("F0"));
    }
}

Log("--- what IS on C-PROP-LINE ---");
var kinds = new Dictionary<string,int>();
foreach (ObjectId id in ms)
{
    var e = Tx.GetObject(id, OpenMode.ForRead) as Autodesk.AutoCAD.DatabaseServices.Entity;
    if (e == null || e.Layer != "C-PROP-LINE") continue;
    var k = e.GetType().Name;
    kinds[k] = kinds.ContainsKey(k) ? kinds[k]+1 : 1;
}
if (kinds.Count == 0) Log("  (nothing in model space on C-PROP-LINE)");
foreach (var kv in kinds) Log("  " + kv.Value + "  " + kv.Key);

Result

--- HERO/TRACT entities: what ARE they? ---
  ParcelSegmentLabel h=20CFD layer='SS-HERO TRACT A ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=20CFE layer='SS-HERO TRACT A ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=20CFF layer='SS-HERO TRACT A ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=2103E layer='SS-HERO TRACT A ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  Polyline h=21075 layer='SS-BOUNDARY TRACT B'
  ParcelSegmentLabel h=21078 layer='SS-HERO TRACT B ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=2107A layer='SS-HERO TRACT A ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=2107B layer='SS-HERO TRACT A ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=2107C layer='SS-HERO TRACT B ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=2107D layer='SS-HERO TRACT B ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=2107E layer='SS-HERO TRACT B ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  ParcelSegmentLabel h=2107F layer='SS-HERO TRACT B ANNO'  PARENT=ParcelSegment on layer 'C-PROP-LINE'
  Polyline h=2167A layer='SS-HERO TRACT B'
  Polyline h=216AD layer='SS-BOUNDARY TRACT A'
  Polyline h=216BA layer='SS-HERO TRACT A'
  Ole2Frame h=21896 layer='SS-BOUNDARY TRACT A'
  Polyline h=2190F layer='SS-BOUNDARY TRACT NF'
--- parcels / sites and their layers ---
  Site 'SITE'
      Parcel 'Property : 26' layer='SS-BOUNDARY LAND LOT' area=43299
      Parcel 'TRACT "B"' layer='C-PROP' area=144351
  Site '{DBBA330E-324D-4F34-97479ABEBDCF917D}|2'
  Site 'CURB'
  Site 'CURB|1'
  Site '{DBBA330E-324D-4F34-97479ABEBDCF917D}|3'
  Site '{DBBA330E-324D-4F34-97479ABEBDCF917D}'
  Site '{DBBA330E-324D-4F34-97479ABEBDCF917D}|4'
  Site '{DBBA330E-324D-4F34-97479ABEBDCF917D}|1'
--- what IS on C-PROP-LINE ---
  3  ParcelSegment