BuildingCoder.CmdWallBottomFace.Execute C# (CSharp) Метод

        public Result Execute(
            ExternalCommandData commandData,
            ref string message,
            ElementSet elements)
        {
            UIApplication app = commandData.Application;
              UIDocument uidoc = app.ActiveUIDocument;
              Document doc = uidoc.Document;

              string s = "a wall, to retrieve its bottom face";

              Wall wall = Util.SelectSingleElementOfType(
            uidoc, typeof( Wall ), s, false ) as Wall;

              if( null == wall )
              {
            message = "Please select a wall.";
              }
              else
              {
            Options opt = app.Application.Create.NewGeometryOptions();
            GeometryElement e = wall.get_Geometry( opt );

            //foreach( GeometryObject obj in e.Objects ) // 2012

            foreach( GeometryObject obj in e ) // 2013
            {
              Solid solid = obj as Solid;
              if( null != solid )
              {
            foreach( Face face in solid.Faces )
            {
              PlanarFace pf = face as PlanarFace;
              if( null != pf )
              {
                if( Util.IsVertical( pf.FaceNormal, _tolerance )
                  && pf.FaceNormal.Z < 0 )
                {
                  Util.InfoMsg( string.Format(
                    "The bottom face area is {0},"
                    + " and its origin is at {1}.",
                    Util.RealString( pf.Area ),
                    Util.PointString( pf.Origin ) ) );
                  break;
                }
              }
            }
              }
            }
              }
              return Result.Failed;
        }