Roof edge

[even_suzanne]

Hello, I am currently creating a prototype chatbot safe revit that answers simple questions such as how many wall, how many fixtures etc for the uninitiated. The problem is that I can't get the roof edge information, it tells me there is no roof edge whereas I have one in the capture below. Here the capture is in French the selection is marked "bord de toiture" but roof edges in EN

And I also saw that in revit dsk tools roof edges in BuiltInCategories is "OST_Fascia" so I modified my code accordingly, but nothing helped.

Thanks in advance for your help !

public static class RoofEdgeAnalysis
{
    // Initialisez la catégorie BuiltInCategory pour OST_Fascia.
    public static readonly BuiltInCategory BuiltInCategories_OST_Fascia = BuiltInCategory.OST_Fascia;

    public static string AnalyzeRoofEdges(Document doc)
    {
        List<RoofEdgeInfo> roofEdgeDetails = GetRoofEdgeDetails(doc);
        if (roofEdgeDetails.Count == 0)
        {
            return "Il n'y a aucun bord de toit dans le projet.";
        }

        StringBuilder roofEdgeSummary = new StringBuilder();
        roofEdgeSummary.AppendLine($"Il y a un total de {roofEdgeDetails.Count} bord(s) de toit dans le projet, réparti(s) comme suit :");

        foreach (var roofEdge in roofEdgeDetails)
        {
            roofEdgeSummary.AppendLine($"- {roofEdge.TypeName}, longueur : {roofEdge.Length:F2} m, hauteur : {roofEdge.Height:F2} m");
        }

        return roofEdgeSummary.ToString();
    }

    private static List<RoofEdgeInfo> GetRoofEdgeDetails(Document doc)
    {
        List<RoofEdgeInfo> roofEdgeDetails = new List<RoofEdgeInfo>();
        FilteredElementCollector collector = new FilteredElementCollector(doc)
            .OfCategory(BuiltInCategories_OST_Fascia)
            .OfClass(typeof(FamilyInstance));

        foreach (FamilyInstance element in collector)
        {
            Parameter lengthParam = element.LookupParameter("Longueur");
            Parameter heightParam = element.LookupParameter("Hauteur");

            double length = 0;
            double height = 0;

            if (lengthParam != null && lengthParam.StorageType == StorageType.Double)
            {
                length = lengthParam.AsDouble();
                // Utilisez UnitUtils pour convertir les unités internes de Revit en mètres.
                length = UnitUtils.ConvertFromInternalUnits(length, UnitTypeId.Meters);
            }

            if (heightParam != null && heightParam.StorageType == StorageType.Double)
            {
                height = heightParam.AsDouble();
                // Utilisez UnitUtils pour convertir les unités internes de Revit en mètres.
                height = UnitUtils.ConvertFromInternalUnits(height, UnitTypeId.Meters);
            }

            roofEdgeDetails.Add(new RoofEdgeInfo(element.Name, length, height));
        }

        return roofEdgeDetails;
    }

[Moustafa_K · Accepted solution]

On quick look over your code I see you used Ost_Fascia as family instance, which is not.

You should omit line 30.

if you want to get the instances, you might use it like this:

FilteredElementCollector collector = new FilteredElementCollector(doc)
    .OfCategory(BuiltInCategory.OST_Fascia)
    .WhereElementIsNotElementType();