Is there an API in Revit that provides the ability for A to bind to B and B to bind to A

[BOb_Zhu]

Is there an API in Revit that provides the ability for A to bind to B and B to bind to A

[jeremy_tammik]

What is A? What is B? And what do you mean by bind?

[BOb_Zhu]

I mean, both A and B are one element, A records B, and B records A.Or after binding, you can find B from A, and B can also find A

[jeremy_tammik · Accepted solution]

Yes. That can easily be achieved by attaching your specific add-in data to each element. There are two ways to attach data to elements: old-fashioned user-visible shared parameters, and more modern extensible storage, accessible only via API. For your use, I would recommend the latter. It also supports storage of ElementId data. More info:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#5.23