BuildingCoder.CmdNewArea.Execute C# (CSharp) Метод

        public Result Execute(
            ExternalCommandData commandData,
            ref string message,
            ElementSet elements)
        {
            Result rc = Result.Failed;

              ViewPlan view = commandData.View as ViewPlan;

              if( null == view
            || view.ViewType != ViewType.AreaPlan )
              {
            message = "Please run this command in an area plan view.";
            return rc;
              }

              UIApplication app = commandData.Application;
              UIDocument uidoc = app.ActiveUIDocument;
              Document doc = uidoc.Document;

              Element room = Util.GetSingleSelectedElement( uidoc );

              if( null == room || !(room is Room) )
              {
            room = Util.SelectSingleElement( uidoc, "a room" );
              }

              if( null == room || !( room is Room ) )
              {
            message = "Please select a single room element.";
              }
              else
              {
            using ( Transaction t = new Transaction( doc ) )
            {
              t.Start( "Create New Area" );

              Location loc = room.Location;
              LocationPoint lp = loc as LocationPoint;
              XYZ p = lp.Point;
              UV q = new UV( p.X, p.Y );
              Area area = doc.Create.NewArea( view, q );
              rc = Result.Succeeded;
              t.Commit();
            }
              }
              return rc;
        }