topic Need to list all parameter type names in Revit API Forum

Need to list all parameter type names

frankloftus — Wed, 17 Sep 2025 17:04:35 GMT

I want to programmatically add family parameters to a family doc using this method:

FamilyManager.AddParameter(String, ForgeTypeId, ForgeTypeId, Boolean)

To create a parameter, you must input the parameter type. To create a text parameter you would use this:

SpecTypeId.String.Text

But let's say I want to give the user a drop-down menu so they can select which parameter type, similar to the Revit UI:

So, I need to list all parameter type names.

I can use this to get all parameter types:

param_types = SpecUtils.GetAllSpecs()

But how do I get their names?

Everything about ForgeTypeId is very confusing to me.

Re: Need to list all parameter type names

longt61 — Thu, 18 Sep 2025 08:14:42 GMT

You can consider ForgeTypeId is just a fancy Autodesk type wrapping predefined enumeration. A part of it defines unit, while other part defines parameter type (spec type), etc..
As for getting the name of a given SpecTypeId, you might want to take a look at the LabelUtils.GetLabelForSpec() method.
Hope this helps.

Re: Need to list all parameter type names

frankloftus — Thu, 18 Sep 2025 13:33:01 GMT

Thank you. That is exactly what I needed. I looked through SpecUtils and didn't find any way to get a spec name. I didn't even think to look at another separate util class. I feel that these util classes are not grouped logically with the objects they operate on (not very OOP). Here is the solution I arrived at:

from selection_form_module import selection_form from Autodesk.Revit.DB import SpecTypeId, SpecUtils, LabelUtils # Get all param types param_types_dict = {LabelUtils.GetLabelForSpec(spec) : spec \ for spec in SpecUtils.GetAllSpecs()} # Get sorted list of all param_type_names param_type_names = sorted(param_types_dict.keys()) # Create selection_form form = selection_form(param_type_names, 'Choose Parameter Type', 'Select') # Show form form.ShowDialog() # Get the selected param_type_name selected_param_type_name = form.selected # Get param_type with selected name selected_param_type = param_types_dict[selected_param_type_name] # Output param_type return selected_param_type