ParameterFilterElement 2020

[BrentBurgess1980]

Hi All,

I am trying to filter rebar and apply a colour to it depending on it's size.  I have noticed that ParameterFilterElement is removed from 2020.

I have having some issues with creating the filter.

  public void CreateFilter(Document doc, View view, double barDiameter)
            {
            // create list of categories that will for the filter
            IList<ElementId> categories = new List<ElementId>();
            categories.Add(new ElementId(BuiltInCategory.OST_Rebar));

            // create a list of rules for the filter
            IList<FilterRule> rules = new List<FilterRule>();
            // This filter will have a single rule for the filter
            Parameter rebarSize = new FilteredElementCollector(doc).OfClass(typeof(Rebar)).FirstElement().get_Parameter(BuiltInParameter.REBAR_BAR_DIAMETER);
            rules.Add(ParameterFilterRuleFactory.CreateLessRule(rebarSize.Id, barDiameter, 0.1));
            
            ParameterFilterElement filter = null;
            using (Transaction t = new Transaction(doc, "Create and Apply Filter"))
                {
                t.Start();
                

                filter = ParameterFilterElement.Create(doc, "Thin Wall Filter", categories,rules);
                
                view.AddFilter(filter.Id);
                t.Commit();
                }

            string filterNames = "";
            foreach (ElementId id in view.GetFilters())
                {
                filterNames += doc.GetElement(id).Name + "\n";
                }
    
            OverrideGraphicSettings ogs = new OverrideGraphicSettings();
            ogs.SetCutLineColor(new Color((byte)255, (byte)0, (byte)0));
            //ogs.SetCutLineColor(getColour(doc.Application,12));

            using (Transaction t = new Transaction(doc, "Set Override Appearance"))
                {
                t.Start();
                view.SetFilterOverrides(filter.Id, ogs);
                t.Commit();
                }
            }

I think I have the rest of it correct, but can't test unitl I fix the ParameterFilterElement issue.

Can anyone point me in the right direction on how to do this?

Thanks,

Brent

[jeremytammik]

No, ParameterFilterElement has not been removed in Revit 2020.

What is the problem you see?

[BrentBurgess1980]

Hi @jeremytammik ... Yeah.... The wording wasn't the best on that post.

filter = ParameterFilterElement.Create(doc, "Thin Wall Filter", categories,rules);

The above line was the line that was causing issues. It flags an error saying it is obsolete in 2019 and removed in 2020.

I was looking for the new way to set the filters and havent had much luck.

I have been programming in AutoCAD for 15 years, and this is my first foray into the Revit space, so still trying to get my head around it all.

Thanks 

Brent

[sragan · Accepted solution]

I got it to run by adding a few lines of code, and changing "rules" to "elemFilter" in the filter line of code.  Like this:

// create a list of rules for the filter
            IList<FilterRule> rules = new List<FilterRule>();
            // This filter will have a single rule for the filter
            Parameter rebarSize = new FilteredElementCollector(doc).OfClass(typeof(Rebar)).FirstElement().get_Parameter(BuiltInParameter.REBAR_BAR_DIAMETER);
            rules.Add(ParameterFilterRuleFactory.CreateLessRule(rebarSize.Id, barDiameter, 0.1));
            List<ElementFilter> elemFilters = new List<ElementFilter>();
					foreach (FilterRule filterRule in rules)
					{
    					ElementParameterFilter elemParamFilter = new ElementParameterFilter(filterRule);
    					elemFilters.Add(elemParamFilter);
					}
					
		 	LogicalAndFilter elemFilter = new LogicalAndFilter(elemFilters);
		 	
            ParameterFilterElement filter = null;
            using (Transaction t = new Transaction(doc, "Create and Apply Filter"))
                {
                t.Start();
                

                filter = ParameterFilterElement.Create(doc, "Thin Wall Filter", categories,elemFilter);

.....

Also, make sure you have a view open that shows rebar of the correct diameter.

[BrentBurgess1980]

Thanks @sragan . That worked well!!