RvtParamDrop

Revit .NET C# add-in to export parameter values for elements visible in current view

Generate a count and a csv of Revit parameters on elements in a view.

Do not limit yourself to shared parameters
Do limit yourself to parameters with a value
Name of the parameter
Schema (TypeId)

A small number of parameters are intentionally ignored as redundant:

ELEM_CATEGORY_PARAM
ELEM_CATEGORY_PARAM_MT
ELEM_FAMILY_AND_TYPE_PARAM
ELEM_TYPE_PARAM
SYMBOL_ID_PARAM

Include parameters from both elements and their types, i.e., both instance and type parameters.

Actually, it's more complicated than that. Anything that is visible in the view will include its instance and type parameters. If an instance or a type has a parameter that refers to another Element, its instance and type parameters are also exported, regardless of whether it is visible or not. That is recursive, so if X references Y references Z references W, then W's parameters are exported if X, Y, or Z is visible. We follow all references. Who are we to say that a referenced Element isn't useful?

To be verified:

All elements of interest and all their references are included
All parameter values of interest were included
For each parameter value, all required data fields were included

The views to be processed are 3D views.

Installation

Standard Revit add-in installation, cf. Revit Developer's Guide Add-in Registration:

Copy the add-in manifest *.addin and .NET assembly DLL into the Revit AddIns folder and restart Revit
Click the menu entry under External Tools → RvtParamDrop