How to get the bounding segments of a room?

[Anonymous]

I am using the following code: I am trying to  get all the bounding segments of each room. But the list is not getting populated by the method of the Rooms class. 

room.GetBoundarySegments(boundaryOptions);

private List<int> GetElementIdsOfWallsEnclosingRooms()
        {
            List<int> elementIdsOfWalls = new List<int>();
            Document doc = commandData.Application.ActiveUIDocument.Document;
            FilteredElementCollector collector = new FilteredElementCollector(doc);
            collector.OfCategory(BuiltInCategory.OST_Rooms);
            IList<IList<BoundarySegment>> boundarySegments;
            foreach (Room room in collector)
            {
                SpatialElementBoundaryOptions boundaryOptions = new SpatialElementBoundaryOptions();
                boundaryOptions.SpatialElementBoundaryLocation = SpatialElementBoundaryLocation.CoreCenter;
                boundaryOptions.StoreFreeBoundaryFaces = true;

                boundarySegments = room.GetBoundarySegments(boundaryOptions);
                IList<BoundarySegment> boundarySegmentList = boundarySegments.ElementAt(0);
                foreach (BoundarySegment boundarySegment in boundarySegmentList)
                {
                    elementIdsOfWalls.Add(boundarySegment.ElementId.IntegerValue);
                }
            }
            return elementIdsOfWalls;
        }

Is there any problem with SpecialElementBoundaryOptions?

The value inside boundarySegments has 0 lists.

[Anonymous]

I think it is because you aren't looping through every List in the List (sounds confusing, I know).

replace your loop with this:

            foreach (Room room in collector)
            {
                SpatialElementBoundaryOptions boundaryOptions = new SpatialElementBoundaryOptions();
                boundaryOptions.SpatialElementBoundaryLocation = SpatialElementBoundaryLocation.CoreCenter;
                boundaryOptions.StoreFreeBoundaryFaces = true;

                boundarySegments = room.GetBoundarySegments(boundaryOptions);

                // IList<BoundarySegment> boundarySegmentList = boundarySegments.ElementAt(0);
                foreach(IList<BoundarySegment> boundarySegmentList in boundarySegments)
                {
                   foreach (BoundarySegment boundarySegment in boundarySegmentList)
                   {
                       elementIdsOfWalls.Add(boundarySegment.ElementId.IntegerValue);
                   }
                }
            }