Lung-Yu,Tsai 的部落格

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public void GetElementsByCategory(ExternalCommandData commandData,BuiltInCategory category)
{
    UIDocument uidoc = commandData.Application.ActiveUIDocument;

    FilteredElementCollector docCollector = new FilteredElementCollector(uidoc.Document);
    docCollector.OfCategory(category);

    IList<Element> elementsInView = docCollector.ToElements();
    StringBuilder sb = new StringBuilder();

    foreach (Element element in elementsInView)
    {
        if (element is FamilyInstance)
        {
            FamilyInstance inst = element as FamilyInstance;
            FamilySymbol Sy = inst.Symbol;
            Family family = Sy.Family;

            sb.Append(string.Format("Family Symbol {0}, Family Name {1}", Sy.Name, family.Name));
        }
    }

    TaskDialog.Show("INFO", sb.ToString());
}