Workaround for "Creating" Legends: duplicating and renaming

Developers
1

Hi everyone!
So, I’m working on a routine that I should create a legend … But since the API won’t let me create legends :roll_eyes: what I’m trying to do is:
If there is no pre-defined legend, duplicate any legend (the duplicate one needs to be blank) and change its name…

I was able to do this on two nodes, but I wanted to insert this into just one… The problem is that when I try it returns:
Warning: IronPythonEvaluator.EvaluateIronPythonScript operation failed.

Traceback (most recent call last):
File “”, line 55, in
AttributeError: ‘View’ object has no attribute ‘ToDSType’

My code:
import clr

Import RevitAPI

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

Import DocumentManager and TransactionManager

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

#allow us to use Dynamo nodes
import clr
clr.AddReference(‘ProtoGeometry’)
from Autodesk.DesignScript.Geometry import *

doc = DocumentManager.Instance.CurrentDBDocument

########################################

INPUTS

viewName = IN [0]
elementlist = list()

Collecting just LEGENDS

#Parameter
param = BuiltInParameter.VIEW_TYPE

#Provider and evaluator
provider = ParameterValueProvider(ElementId(param))
evaluator = FilterStringEquals()

for n in viewName:
#rules
rule = FilterStringRule(provider, evaluator, “Legends”, False)
filterparm = ElementParameterFilter(rule)

Collector

collector = FilteredElementCollector(doc).OfClass(View).WherePasses(filterparm).ToElements()

######## APPLYING CONDITIONS ######
existview =
view =
for i in collector:
if i.Name == viewName:
view = i
elif i.ViewType == ViewType.Legend:
existview.append(i)
TransactionManager.Instance.EnsureInTransaction(doc)
##duplicate view and get it
view= existview[0].Duplicate(ViewDuplicateOption.Duplicate)
TransactionManager.Instance.ForceCloseTransaction()
“”"" WHAT I’m strugling
x = doc.GetElement(view).ToDSType(True)
view = u.SetParameterByName(“View Name”, viewName)
“”"
else:
view = “no legend in this project”

OUT = view

Sample_workaround.dyn (8.4 KB)
has anyone found a solution for this?

2

Hi @luupieper,

To call ToDSType() you need to add to imports :

clr. AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.Elements)
from Revit.Elements import *
3

Hello @Alban_de_Chasteigner , thanks for the help!
Okay, So now It’s working But I don’t get why it’s trying to change the name of the view even when I already have one with his name (Theoretically, since the first If was satisfied, Dynamo would not try Elif, right?)
imagen

import clr

Import RevitAPI

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

Import DocumentManager and TransactionManager

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

#allow us to use Dynamo nodes
import clr
clr.AddReference(‘ProtoGeometry’)
from Autodesk.DesignScript.Geometry import *

clr. AddReference(‘RevitNodes’)
import Revit
clr.ImportExtensions(Revit.Elements)
from Revit.Elements import *

doc = DocumentManager.Instance.CurrentDBDocument

########################################

INPUTS

viewName = IN [0]
elementlist = list()

Collecting just LEGENDS

#Parameter
param = BuiltInParameter.VIEW_TYPE

#Provider and evaluator
provider = ParameterValueProvider(ElementId(param))
evaluator = FilterStringEquals()

for n in viewName:
#rules
rule = FilterStringRule(provider, evaluator, “Legends”, False)
filterparm = ElementParameterFilter(rule)

Collector

collector = FilteredElementCollector(doc).OfClass(View).WherePasses(filterparm).ToElements()

######## APPLYING CONDITIONS ######
existview =
view =
for i in collector:
if i.Name == viewName:
view = i
elif i.ViewType == ViewType.Legend:
existview.append(i)
TransactionManager.Instance.EnsureInTransaction(doc)
##duplicate first legend found

  tempview= existview[0].Duplicate(ViewDuplicateOption.Duplicate)
  TransactionManager.Instance.TransactionTaskDone()
  
  u = doc.GetElement(tempview).ToDSType(True)
  view = u.SetParameterByName("View Name", viewName)

else:
view = “no legend in this project”

OUT = view