/// <summary> /// Implement this method as an external command for Revit. /// </summary> /// <param name="commandData">An object that is passed to the external application /// which contains data related to the command, /// such as the application object and active view.</param> /// <param name="message">A message that can be set by the external application /// which will be displayed if a failure or cancellation is returned by /// the external command.</param> /// <param name="elements">A set of elements to which the external application /// can add elements that are to be highlighted in case of failure or cancellation.</param> /// <returns>Return the status of the external command. /// A result of Succeeded means that the API external method functioned as expected. /// Cancelled can be used to signify that the user cancelled the external operation /// at some point. Failure should be returned if the application is unable to proceed with /// the operation.</returns> public virtual Result Execute(ExternalCommandData commandData , ref string message, ElementSet elements) { try { Autodesk.Revit.DB.Document document = commandData.Application.ActiveUIDocument.Document; // Create a new transaction Transaction tran = new Transaction(document, "GeometryCreation_BooleanOperation"); tran.Start(); // Create an object that is responsible for creating the solids GeometryCreation geometryCreation = GeometryCreation.getInstance(commandData.Application.Application); // Create an object that is responsible for displaying the solids AnalysisVisualizationFramework AVF = AnalysisVisualizationFramework.getInstance(document); // Create a CSG tree solid CSGTree(geometryCreation, AVF); tran.Commit(); // Set the view which display the solid active commandData.Application.ActiveUIDocument.ActiveView = (((new FilteredElementCollector(document). OfClass(typeof(Autodesk.Revit.DB.View))). Cast <Autodesk.Revit.DB.View>()). Where(e => e.Name == "CSGTree")). First <Autodesk.Revit.DB.View>(); return(Result.Succeeded); } catch (Exception ex) { message = ex.Message; return(Result.Failed); } }