Revit二次开发“创建组遍历组Group”

group 就是吧一些有关系的对象放在一个组里面

[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
//[Journaling(JournalingMode.NoCommandData)]
public class cmdGroup : IExternalCommand
{
    public Result Execute(ExternalCommandData cmdData, ref string message, ElementSet elements)
    {
        UIDocument uiDoc = cmdData.Application.ActiveUIDocument;
        Selection selection = uiDoc.Selection;

        Transaction ts = new Transaction(uiDoc.Document, "group");
        ts.Start();

        Group group = null;
        ElementSet selections = uiDoc.Selection.Elements;
        if (selections.Size > 0)
        {
            group = uiDoc.Document.Create.NewGroup(selections);
        }
        group.GroupType.Name = "firstGroup";

        //遍历一下group
        FilteredElementCollector collector = new FilteredElementCollector(uiDoc.Document);
        ICollection<Element> collection = collector.OfClass(typeof(Group)).ToElements();
        foreach (Element el in collection)
        {
            TaskDialog.Show("group", el.Name);
        }

        ts.Commit();

        return Result.Succeeded;
    }
}

from:http://revit.5d6d.com/thread-1216-1-1.html