<Revit二次开发> Create Doors in Wall

namespace CreateTables
{
    [Transaction(TransactionMode.Manual)]
    public class Command : IExternalCommand
    {
        public Result Execute(
          ExternalCommandData commandData,
          ref string message,
          ElementSet elements)
        {
            UIApplication uiapp = commandData.Application;
            UIDocument uidoc = uiapp.ActiveUIDocument;
            Application app = uiapp.Application;
            Document doc = uidoc.Document;


            Selection sel = uidoc.Selection;
            Reference ref1 = sel.PickObject(ObjectType.Element, "Please pick a Wall");
            Wall wall = doc.GetElement(ref1) as Wall;
            CreateDoorsInWall(doc, wall);
            return Result.Succeeded;
        }
    
        private void CreateDoorsInWall(Document doc, Wall wall) 
        {
            String fileName = @"C:\Program Files\Common Files\Autodesk Shared\Extensions 2013\Data\Families\Profiles\DB\Beam\DB_Beam_UAP.rfa";
            Family family = null;
            if (!doc.LoadFamily(fileName, out family))
            {
                throw new Exception("Unable to load" + fileName);
            }
            //get the active view's level for beam creation
            Level level = doc.ActiveView.Level;


            FamilySymbolSetIterator symbolItor = family.Symbols.ForwardIterator();
            double x = 0, y = 0, z = 0;
            while (symbolItor.MoveNext())
            {
                FamilySymbol symbol = symbolItor.Current as FamilySymbol;
                XYZ location = new XYZ(x, y, z);
                FamilyInstance instance = doc.Create.NewFamilyInstance(location, symbol,
                    wall, level, StructuralType.NonStructural);
                x += 10;
                y += 10;
                z += 1.5;


            }
        }    
    }
    
}