Revit二次开发之“创建直线”并显示出来

直接用NewLine();显示不了，需要一个草图平面。

[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
//[Journaling(JournalingMode.NoCommandData)]
public class NewLine : IExternalCommand
{
    public Result Execute(ExternalCommandData revit, ref string message, ElementSet elements)
    {

        Document doc = revit.Application.ActiveUIDocument.Document;
        //需要启动一个事务
        Transaction tr = new Transaction(doc, "test");
        tr.Start();

        XYZ pt1 = new XYZ(5, 5, 0);
        XYZ pt2 = new XYZ(5, 10, 0);

        Line line = doc.Application.Create.NewLine(pt1, pt2,true);
        XYZ origin = new XYZ(0, 0, 0);
        XYZ normal = new XYZ(0, 0, 1);

        Plane plane = doc.Application.Create.NewPlane(pt2.CrossProduct(pt1), pt1);//平面
        SketchPlane skplane = doc.Create.NewSketchPlane(plane);//草图平面
        ModelCurve modelcurve1 = doc.Create.NewModelCurve(line, skplane);//模型曲线

        tr.Commit();

        return Autodesk.Revit.UI.Result.Succeeded;
    }
}

from:http://revit.5d6d.com/thread-913-1-4.html