Adding Calculated Parameter using Revit API

Developers
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1

Hello,

I am having trouble adding a calculated parameter to a schedule using the Revit API.
Attempted to create schedules using Python in Dynamo. While I successfully created a new Material Takeoff and added parameters to the schedule, I couldn’t locate a method for adding a calculated column in schedules.

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desiredParams = ["***", "Type","Material: Name", "************", "Length","Calculated Weight", "Structural Usage"]
OUT = []

#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)
cat = Category.GetCategory(doc, BuiltInCategory.OST_StructuralColumns)
viewSchedule = ViewSchedule.CreateMaterialTakeoff(doc, cat.Id)
definition = viewSchedule.Definition
params = [i.GetName(doc) for i in definition.GetSchedulableFields()]
schedulableFields = definition.GetSchedulableFields()
for j in desiredParams:
	if j in params:
		ind = params.IndexOf(j)
		definition.AddField(schedulableFields[ind])
		OUT.append(j + " Added")
	elif j == "Calculated Weight":
	
	else:
		OUT.append(j + " Not founds")
TransactionManager.Instance.TransactionTaskDone()
2

hi @NIRMAL

you are on right track, here InsertCombinedParameterField Method (revitapidocs.com) , using this method u can add the formula u looking for it takes “ScheduleFieldType” which is an Enumeration and i think this will get u to what u trying to do.

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Regards,
BM

3

It is still unclear path for me.
The method InsertCombinedParameterField Method doesn’t do the calculation and it does not take the ScheduleFieldType enumeration as input

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An example of how we can use this enumeration to add a calculated field will be very helpful.

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4

Hi,

Unless recently changed, this is not supported by the API.

see here

2 Likes
5

Even i was trynna achieve this using that enumeration and creating a schedulable field but no success @NIRMAL i’ll still be looking and will keep u posted here :cry: