BuildingCoder.CmdNewWallLayer.Execute C# (CSharp) Метод

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

            #if _2011
              //
              // code for the Revit 2011 API:
              //
              Debug.Assert( false,
            "Currently, no new wall layer can be created, because"
            + "there is no creation method available for it." );

              foreach( WallType wallType in doc.WallTypes )
              {
            if( 0 < wallType.CompoundStructure.Layers.Size )
            {
              CompoundStructureLayer oldLayer
            = wallType.CompoundStructure.Layers.get_Item( 0 );

              WallType newWallType
            = wallType.Duplicate( "NewWallType" ) as WallType;

              CompoundStructure structure
            = newWallType.CompoundStructure;

              CompoundStructureLayerArray layers
            = structure.Layers;

              // from here on, nothing works, as expected:
              // in the Revir 2010 API, we could call the constructor
              // even though it is for internal use only.
              // in 2011, it is not possible to call it either.

              CompoundStructureLayer newLayer = null;
              //  = new CompoundStructureLayer(); // for internal use only

              newLayer.DeckProfile = oldLayer.DeckProfile;
              //newLayer.DeckUsage = oldLayer.DeckUsage; // read-only
              //newLayer.Function = oldLayer.Function; // read-only
              newLayer.Material = oldLayer.Material;
              newLayer.Thickness = oldLayer.Thickness;
              newLayer.Variable = oldLayer.Variable;
              layers.Append( newLayer );

            }
              }
            #endif // _2011

              using ( Transaction t = new Transaction( doc ) )
              {
            t.Start( "Create New Wall Layer" );

            //WallTypeSet wallTypes = doc.WallTypes; // 2013

            FilteredElementCollector wallTypes
              = new FilteredElementCollector( doc )
            .OfClass( typeof( WallType ) ); // 2014

            foreach ( WallType wallType in wallTypes )
            {
              if ( 0 < wallType.GetCompoundStructure().GetLayers().Count )
              {
            CompoundStructureLayer oldLayer
              = wallType.GetCompoundStructure().GetLayers()[0];

            WallType newWallType
              = wallType.Duplicate( "NewWallType" ) as WallType;

            CompoundStructure structure
              = newWallType.GetCompoundStructure();

            IList<CompoundStructureLayer> layers
              = structure.GetLayers();

            // in Revit 2012, we can create a new layer:

            double width = 0.1;
            MaterialFunctionAssignment function = oldLayer.Function;
            ElementId materialId = oldLayer.MaterialId;

            CompoundStructureLayer newLayer
              = new CompoundStructureLayer( width, function, materialId );

            layers.Add( newLayer );
            structure.SetLayers( layers );
            newWallType.SetCompoundStructure( structure );
              }
            }
            t.Commit();
              }
              return Result.Succeeded;
        }