How to retrieve the openings of Wall (not the coordinates)?

Question

我已经将级别检索为树视图（WPF 形式的树视图中的级别列表），然后从 Revit 项目中的特定级别（例如 Level1）中选择了一堵墙（例如 xyz_wall），我想检索列表开口（门和窗）选定的墙并显示到消息框（在消息框-开口列表中：）。

Answer 1

Window and Doors are FamilyInstances, and an Opening cut through a wall is an Opening object.

private IList<Element> GetHostedElements(Wall wall)
{
    Document doc = wall.Document;
    
    ElementId id = wall.Id;
    
    IList<Element> result = new List<Element>();

    IEnumerable<Opening> openingInstances =
        new FilteredElementCollector(doc)
            .OfClass(typeof(Opening))
            .WhereElementIsNotElementType()
            .Cast<Opening>();

    foreach (Opening openingInstance in openingInstances)
    {
        if (openingInstance.Host.Id.Equals(id))
        {
            result.Add(openingInstance);
        }
    }

    IEnumerable<FamilyInstance> familyInstances =
        new FilteredElementCollector(doc)
            .OfClass(typeof(FamilyInstance))
            .WhereElementIsNotElementType()
            .Cast<FamilyInstance>();
                
    foreach (FamilyInstance familyInstance in familyInstances)
    {
        if (familyInstance.Host.Id.Equals(id))
        {
            result.Add(familyInstance);
        }
    }
    
    return result;          
}

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