IF condition based on label (family selection) parameter

[denisyukJ]

Hello everyone, 

I want to make realtion based on selected family type (label parameter in family creator). I understand the logic, but can't realize that and find information in knowledge database.

At the pic below i breefly describe what i am talking about, but this syntax doesn't work.

Sample file in attached. Revit 2021.

[RDAOU · Accepted solution]

@denisyukJ 

You need 3 Family Type Parameters (T1, T2, T3)  to serve as a dictionary (1 for each cube type)...

then you set the If statement based on FamilySelection matching each of the above parameters

if(FamilySelection = T1, 100 mm, if(FamilySelection = T2, 200 mm, if(FamilySelection = T3, 300 mm, 0 mm)))