using fabrication part as a family symbol

[nia98bim]

I am currently working on a project in Revit and need to place mechanical fabrication hangers at specific points within the model. However, these parts cannot be used as family symbols.

    // Collect all ducts
    FilteredElementCollector ductshanger = new FilteredElementCollector(doc)
        .OfCategory(BuiltInCategory.OST_FabricationHangers)
        .WhereElementIsNotElementType();

    // Initialize a list to store hanger names
    List<string> hangerNames = new List<string>();

    foreach (Element item in ductshanger)
    {
        FamilySymbol hangerSymbol2 = item as FamilySymbol;
        TaskDialog.Show("Fabrication Hangers", $"Hanger :\n{hangerSymbol2 != null}");
        if (hangerSymbol2 != null)
        {
            // Add the hanger name to the list
            hangerNames.Add(hangerSymbol2.Name);
        }
    }

I used the task.dialog and the result was false.

Could you provide guidance or suggest an alternative approach?

Thank you in advance for your assistance.

[jeremy_tammik · Accepted solution]

You cannot place fabrication parts in the same manner as family instances. 

You can use the FabricationPart.CreateHanger method:

• https://www.revitapidocs.com/2024/aafc60d9-fd3e-59e1-1278-eda915ce1848.htm

Its use is demonstrated by the FabricationPartLayout SDK sample.

[nia98bim]

hi @jeremy_tammik  thank you for your reply,
I was just wondering is do you have any sample of using create hanger in some codes?

[jeremy_tammik]

Yes. Look at the official Revit SDK samples. FabricationPartLayout is your man.

[nia98bim]

@jeremy_tammik Thank you,  I checked those samples, but another problem is when I want to select my fabrication services it doesn't find it, while the item exists in the project.

  // Step 1: Collect all Fabrication Parts in the project
  FilteredElementCollector collector = new FilteredElementCollector(doc)
                                        .OfClass(typeof(FabricationService));


  // Step 4: Display the message in a TaskDialog
  TaskDialog.Show("Fabrication Services", "f" + collector.Count());


  // Assuming Services is initialized elsewhere or modify it here
  FabricationService sb = Services?.FirstOrDefault(x => x.Name.Contains("(500PA)"));
  if (sb == null)
  {
      TaskDialog.Show("Error", " FabricationService not found.");
      return Result.Failed;
  }

[nia98bim]

 Hello, @jeremy_tammik . I tried to edit my code based on the sdk .
but when i select my hanger to placed the erorr that i faced in revit is "Please use FabricationPart.CreateHanger to create fabrication hanger.
Parameter name: button"

  // Access the Fabrication Configuration
  FabricationConfiguration config = FabricationConfiguration.GetFabricationConfiguration(doc);
  if (config == null)
  {
      message = "Cannot retrieve the fabrication configuration.";
      return Result.Failed;
  }

  m_services = config.GetAllLoadedServices();
  if (m_services.Count == 0)
      return Result.Failed;

  // Get the FabricationService associated with the selected FabricationPart
  int serviceId = part.ServiceId;
  FabricationService partService = config.GetService(serviceId);
  if (partService == null)
  {
      message = "Cannot retrieve fabrication service for the selected part.";
      return Result.Failed;
  }

  // Locate the required service button
  FabricationServiceButton sbButton = LocateButton(partService, 4, "Strut Hanger");
  if (sbButton == null)
  {
      message = "The required button was not found in the selected service.";
      return Result.Failed;
  }

 FabricationPart pt_rectStraight1 = CreateStraightPart(sbButton, 0, viewLevel.Id, 15.0);
 if (pt_rectStraight1 == null)
 {
     message = "Failed to create hanger part.";
     trans.RollBack();
     return Result.Failed;
 }

 Connector conn1_straight1 = GetPrimaryConnector(pt_rectStraight1.ConnectorManager);
                                

 FabricationPart.CreateHanger(doc, sbButton, element.Id, conn1_straight1, 5.0, true);

I really appreciated that give me about about it.