/// <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 Autodesk.Revit.UI.Result Execute(Autodesk.Revit.UI.ExternalCommandData commandData, ref string message, Autodesk.Revit.DB.ElementSet elements) { Autodesk.Revit.UI.UIApplication application = commandData.Application; m_docment = application.ActiveUIDocument.Document; try { // user should select one slab firstly. if (application.ActiveUIDocument.Selection.Elements.Size == 0) { TaskDialog.Show("Revit", "Please select one slab firstly.", TaskDialogCommonButtons.Ok); return(Autodesk.Revit.UI.Result.Cancelled); } // get the selected slab and show its span direction ElementSet elementSet = application.ActiveUIDocument.Selection.Elements; ElementSetIterator elemIter = elementSet.ForwardIterator(); elemIter.Reset(); while (elemIter.MoveNext()) { Floor floor = elemIter.Current as Floor; if (floor != null) { GetSpanDirectionAndSymobls(floor); } } } catch (Exception ex) { message = ex.ToString(); return(Autodesk.Revit.UI.Result.Failed); } return(Autodesk.Revit.UI.Result.Succeeded); }
/// <summary> /// Reads the current selection of Revit. /// </summary> /// <param name="errorMessage">The error message.</param> /// <returns>True if reading succeed; otherwise, false.</returns> private bool ReadSelectedElementFromRevit(out string errorMessage) { errorMessage = string.Empty; if (ThisExtension.Revit.ActiveUIDocument.Selection.Elements.Size == 0) { errorMessage = "The selection is empty"; return(false); } if (ThisExtension.Revit.ActiveUIDocument.Selection.Elements.Size > 1) { errorMessage = "The selection contains more than one element"; return(false); } ElementSetIterator iterator = ThisExtension.Revit.ActiveUIDocument.Selection.Elements.ForwardIterator(); iterator.Reset(); iterator.MoveNext(); FamilyInstance familyInstance = iterator.Current as FamilyInstance; if (familyInstance == null) { errorMessage = "Selected element is not a FamilyInstance"; return(false); } if (familyInstance.StructuralType == Autodesk.Revit.DB.Structure.StructuralType.Beam || familyInstance.StructuralType == Autodesk.Revit.DB.Structure.StructuralType.Column || familyInstance.StructuralType == Autodesk.Revit.DB.Structure.StructuralType.Brace) { ThisMainExtension.Data.SelectedElement = familyInstance; FillPropertiesOfSelectedElement(); FillGeometryOfSelectedElement(); return(true); } else { errorMessage = "Selected element is not a beam nor a column"; return(false); } }