Most efficient way to count all pipe instances in the project

[Maxim-CADman77]

I'd like to know which is the most efficient way to count all pipe instances in the active project.
I'm using C#.

[jeremy_tammik · Accepted solution]

Have you looked at the Revit API getting started material at all?

https://thebuildingcoder.typepad.com/blog/about-the-author.html#2

Your question is answered there in full, and many others also.

Basically, all you need is a filtered element collector that specifies those pipe instances of interest to you and returns their count. Something like this:

  int nPipes = new FilteredElementCollector(doc)
    .OfClass(typeof(Pipe))
    .GetElementCount();

For more information, please refer to The Building Coder topic group on filtered element collectors:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#5.9