Retrieve instance parameter value from linked element

Developers
,
1

I’d like to retrieve the level information from structural framing elements of a linked file. This is what I have for now:

import System
import sys
import clr

clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
from System.Collections.Generic import *

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

clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)

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

clr.AddReference('DSCoreNodes')
from DSCore import *

elements = UnwrapElement(IN[0])

for el in elements:
	el_parameter = el.LookupParameter("Reference Level")
	level = el_parameter.AsString()

		
OUT = level

I have retrieved the linked elements from another script. Right now the output is “null”.

2

Level is stored as an element, so you would get the string by using AsValueString(). AsString() would be for a parameter value that’s already stored as a string.

Also, you currently loop through each element but overwrite the level value each time. You need a list that you can append each value to so that you can return the whole list.

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