How to get change parameter value of a family type in dynamo and get it update in the model in Revit

Revit
, ,
5

So I was looking through the nodes available and was hitting a little bit of a road block so I put together a python version of what you were trying to do including the reloading.

#Sean Page, 2021
import clr

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *

clr.AddReference('System')
from System.Collections.Generic import List

clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.Elements)

clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

class FamilyOption(IFamilyLoadOptions):
	def OnFamilyFound(self,familyInUse,overwriteParameterValues):
		overwriteParameterValues = True
		return True
		
	def OnSharedFamilyFound(self, sharedFamily, familyInUse, FamilySource, overwriteParameterValues):
		overwriteParameterValues = True
		return True

doc = DocumentManager.Instance.CurrentDBDocument
uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument

#Preparing input from dynamo to revit
family = UnwrapElement(IN[0])
status = []

#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)
for symbId in family.GetFamilySymbolIds():
	symbol = doc.GetElement(symbId)
	if not symbol.IsActive:
		symbol.Activate()
		
TransactionManager.Instance.TransactionTaskDone()
TransactionManager.Instance.ForceCloseTransaction()
if IN[4]:
	try:
		famDoc= doc.EditFamily(family)
		params = famDoc.FamilyManager.Parameters
		types = famDoc.FamilyManager.Types
		trans = Transaction(famDoc)
		trans.Start("test")
		for type in types:
			if type.Name == IN[1]:
				famDoc.FamilyManager.CurrentType = type
		for param in params:
			if param.Definition.Name == IN[2]:
				famDoc.FamilyManager.Set(param,IN[3])
		trans.Commit()
		famDoc.LoadFamily(doc,FamilyOption())
		famDoc.Close(False)
		status.append("Success")
	except:
		status.append("Failed")

OUT = status

Change Family Parameter_2021-04-09_06-42-08

Change Family Parameter.dyn (12.0 KB)

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