Using text parameter on checkbox's formula

[aboyacioglu]

Hi,

If the value of DW_Protection_Text is DPFH, I want the checkbox for Door Protection Full Height to be selected. However, when I write the formula if(DW_Protection_Text = DPFH, 1 < 2, 2 < 1), it gives the error you see below.                                                    

Can text parameters be used in checkbox formulas? What is the correct formula?

Note: The formula if(DW_Protection_Text = "DPFH", 1 < 2, 2 < 1) also does not work.

[dtiemeyer]

I dont believe it is possible in this arrangement. I've never been able to parse a text parameter and get any results. The only reason to not make DPFH a checkbox itself is if there are multiple possible values (more than just true or false), in which case a small list of checkbox options is generally the way to go because then your if/then statements become tolerable, but more than a handful of possible values makes the resulting required formulas nightmarish.

[aboyacioglu]

Yes, I realized this after some research. I created an integer parameter and linked the text to it, but that didn't work either. The data will come from the text parameter; is there no solution for this?

[dtiemeyer]

Perhaps this workaround, but 'list' is not a type of data supported by parameter values.

How to create parameter drop-down list in Revit

[bwieldraaijer · Accepted solution]

It is possible but not with a just a formula, you can add a lookup table as shown in the image and family i've included in my reply.

You'll need to add a parameter for the lookup table name ('LU' in the image, but could be named however you'd like) as shown.

I hope my explanation makes sense and that this helps!

[aboyacioglu]

thank you it's helpful