How to choose an element with a given parameter name?

[peerawit.ru]

Hi everyone

Suppose i create shared parameter in to project and assign some categories.

I want to input parameter name for get all elements of categories that parameter assigned

Is there an Revit API command to do this?

Thank a lot.

[Mohamed_Arshad · Accepted solution]

HI @peerawit.ru 

There is no direct Method to do this.
1. Need to Filter all Elements.

2.Using LOOKUP Parameter check each element.

3.Get Categories in the List

4.Control Duplicating Categories.

Hope this helps 🙂

[peerawit.ru]

Hi @Mohamed_Arshad 

Now i use same your method but project has a lot of element it so slow. 😥

If you found faster way tell me please.

Thank for your recommend.

[Mohamed_Arshad]

Yeah, I think that also. Let me write.

[peerawit.ru]

It warnings that InternalDefinition not have Category property.😥

[Mohamed_Arshad]

HI @peerawit.ru 

In the Revit API, parameters themselves do not have categories. Instead, elements have categories, and parameters are associated with specific element instances.

To get the categories of elements that have a specific parameter, you'll need to iterate over the elements, check if the parameter exists for each element, and then retrieve the category of that element.

What I mentioned earlier. Let other experts can look into and tell the answer.

[peerawit.ru]

Thank You for your recommend.