Revit二次開發--管道打斷

今天在研究在管道上添加閥門的代碼實作，我的思路是：

1）在拾取的管道的點的位置，打斷管道

2）在拾取的點的位置建立閥門執行個體；

3）管道和閥門實作連接配接件連接配接

下面是第一個問題的解決：

private void BreakPipe(Document doc, Selection selection)
    {
        Reference reference = selection.PickObject(ObjectType.Element);
        Pipe pipe = doc.GetElement(reference) as Pipe;
        LocationCurve pipeLocationCurve = pipe.Location as LocationCurve;

        XYZ pickPoint = reference.GlobalPoint;
        XYZ projectPickPoint = pipeLocationCurve.Curve.Project(pickPoint).XYZPoint;
        using (Transaction trans = new Transaction(doc))
        {
            trans.Start("Break Pipe");

            //取得管道新的定位基線
            Curve newCurve1 = Line.CreateBound(pipeLocationCurve.Curve.GetEndPoint(0), projectPickPoint);
            Curve newCurve2 = Line.CreateBound(projectPickPoint, pipeLocationCurve.Curve.GetEndPoint(1));

            //複制管道
            Pipe copyPipe = doc.GetElement(ElementTransformUtils.CopyElement(doc, pipe.Id, new XYZ(0, 0, 0)).ElementAt(0)) as Pipe;
            LocationCurve copyPipeLocationCurve = copyPipe.Location as LocationCurve;

            //設定管道的新基線
            pipeLocationCurve.Curve = newCurve1;
            copyPipeLocationCurve.Curve = newCurve2;

            trans.Commit();
        }
    }