How to use BuiltInCategory.OST_Wall ?

[Anonymous]

Hello,

I have four structural walls in my project but given code showing zero. Where am I making mistake? However if I replace OST_Walls with OST_StructuralColumns, it works perfectly.  Also from where can I get description of all members of BuiltInCategory enum? Revit Api docs just provide members without details.

public void Trial1()
		{
			Document doc = this.ActiveUIDocument.Document;
			string info = String.Empty;
			int a=0;
			foreach (Element e in new FilteredElementCollector(doc)
                                   .OfClass(typeof(FamilyInstance))
                                   .OfCategory(BuiltInCategory.OST_Walls))
			{
				a++;
			}
			TaskDialog.Show("Count",a.ToString());
		}

[MarryTookMyCoffe · Accepted solution]

If you look for walls you write ofclass(Wall) not a familyInstance.

Try this, install revit look up and see there what object is which class.

[jeremytammik · Accepted solution]

Thanks to MarryTookMyCoffe for the helpful answer. This is the link to download and install RevitLookup:

https://github.com/jeremytammik/RevitLookup