Get All Parameters from model elements

[jazlik]

Hey!

I guess this idea was mentioned here a few times, but I quite do not find anything specific for my case.

I would like to find all categories of elements which are "present" in a model. So I would like to find only these categories that have elements instance in a model.

I think I went from backwards as first I get all the categories from the model:

First I wanted to get all categories in a document:

public List<Category> GetAllCategoriesInDocument()
{
   Categories categories = Doc.Settings.Categories;
   List <Category> listOfCategories = new List<Category>();
   foreach (Category category in categories)
   {
      // Check if the category is valid and can be used in the model
      if (category != null && category.AllowsBoundParameters)
      {
      listOfCategories.Add(category);
      }
   }
return listOfCategories;
}

Then I wanted to get all parameters from these categories, using first element in model

public List<Parameter> GetAllParametersOfGivenCategoryFromFirstElement(Category category)
{
ElementFilter elementCategoryFilter = new ElementCategoryFilter((BuiltInCategory)category.Id.IntegerValue);
Element element = new FilteredElementCollector(Doc).WherePasses(elementCategoryFilter).ToElements().First();
return (List<Parameter>)element.GetOrderedParameters();
}

It just occured to me that it will not work as not all categories are going to have elements in the model! Surprise 😄

So I followed a few posts here and get to jeremy github(Lab2_2_ModelElements):

https://github.com/jeremytammik/AdnRevitApiLabsXtra/blob/master/XtraCs/Labs2.cs#L506-L686

However, I am not quite sure whether getting all model elements is the correct approach?

Thank you for your help!

[caroline.gitonga · Accepted solution]

Hi @jazlik, 

Kindly, have a look at this forum thread as advised by Jeremy on the issue: https://forums.autodesk.com/t5/revit-api-forum/check-if-a-category-contains-any-element/td-p/8759761

Ideally, your approach seems quite right. You my loop through the retrieved list of categories, using FilteredElementCollector  to get the count of elements in each category

[jazlik]

Thanks!

I guess I was littering blog with another similar post. Thanks anyway! I will look!