topic Re: how to know if a familyInstance is a sliding door in Revit API Forum

how to know if a familyInstance is a sliding door

Anonymous — Tue, 10 Nov 2020 16:57:18 GMT

Hi, I am trying to know if a familyInstance( we can assume it is a door) is a door sliding. I found several enumerate which describes this such as https://www.revitapidocs.com/2015/1602b6b6-f9f2-c356-2391-1e90a79e4654.htm

but when I try to retrieve this parameter I got null. I have been trying in some Revit Example.

How could I get this ? Should familyInstance have a MEPModel?

Regards

Re: how to know if a familyInstance is a sliding door

fdkuenneke — Tue, 10 Nov 2020 18:45:15 GMT

Hello Alvero,

That property specifically refers to IFC elements. Depending on how you are defining the door as a "Sliding Door" in the family, you may have to query the family via the API in different ways. Have you seen Jeremy Tammik's tool: Revit Lookup? It may prove invaluable to finding what exactly you need to define the parameter you are looking for as in order to retrieve its value. A Similar question was asked (and answered) here.

Re: how to know if a familyInstance is a sliding door

Anonymous — Wed, 11 Nov 2020 09:21:38 GMT

Thanks for your answer, I used "lookup" to find the parameter however it always retrieve null so that means there is no parameter. Therefore my concerns are that the family can be implemented without this parameter. Could I get the associated IFC element from a family instance? I might look up the parameter in a wrong element.

Re: how to know if a familyInstance is a sliding door

fdkuenneke — Wed, 11 Nov 2020 12:06:43 GMT

Could you post the family / project so that I may replicate this?

Re: how to know if a familyInstance is a sliding door

Anonymous — Wed, 11 Nov 2020 14:44:55 GMT

Do you have the revit example called rac_basic_sample_project?

this door is

Re: how to know if a familyInstance is a sliding door

fdkuenneke — Wed, 11 Nov 2020 15:31:11 GMT

Good morning,

I took a look at the sample file. From what I can see, there are no properties defining this door as a sliding door. If you wish to add a property to define this, This post may be of value to you. Please note that IFC files are used for sharing files for coordination between different programs, and that a revit families are saved as an RFA file. This would mean that any IFC parameter you are using in the API (in your case, IFCDoorStyleOperation) will return null because it is not part of an IFC file, it is a Revit Family.

While not advisable, you could technically extract that this door is a sliding door using the family name like so:

//get the currently selected element Element elem = doc.GetElement(uidoc.Selection.GetElementIds().First()); //If the name contains Slide or sliding... if (elem.Name.ToLower().Contains("Slide") || elem.Name.ToLower().Contains("sliding")) { //Do Stuff if it is a sliding door. }

Let me know if this helps.

Re: how to know if a familyInstance is a sliding door

Anonymous — Wed, 11 Nov 2020 16:37:38 GMT

thanks you @fdkuenneke, that's exactly what I am doing using resources to make it language independent.

Re: how to know if a familyInstance is a sliding door

fdkuenneke — Wed, 11 Nov 2020 16:41:10 GMT

Just a heads up, I noticed in my code sample I wrote "Slide". Make sure this is not capitalized!