Free Source Code: Collect all Rooms on a Given Level

From the Building Coder blog:

Collect all Rooms on a Given Level

From the Revit API discussion forum thread on collecting all rooms in level xx:

Question: How can I collect all rooms on a given level?

Answer 1: You can’t collect Rooms directly, you need to collect SpatialElement instead, its parent class, and then post-process the results:

  public List<Room> GetRoomFromLevel( 
    Document document, 
    Level level )
  {
    List<Element> Rooms 
      = new FilteredElementCollector( document )
      ...

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