[摘要] 今天有朋友问我怎幺通过Revit读取cad里的单独的一条线，我刚开始在网上找了一下，发现并没有相关介绍，网上都是读取cad里所有的线的信
今天有朋友问我怎幺通过Revit读取cad里的单独的一条线，我刚开始在网上找了一下，发现并没有相关介绍，网上都是读取cad里所有的线的信息或者图层相关。于是我自己尝试了一下，只要通过这个关键的PickObject(ObjectType.PointOnElement)方法，就可以获取到点选的单独的一条线，然后通过GetGeometryObjectFromReference转化成geometryObject即可。然后想怎幺利用就怎幺利用你选的信息（我这里是读取出线的第二个点的坐标）。
public class Class1 : IExternalCommand { public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements) { Document revitDoc = commandData.Application.ActiveUIDocument.Document; //取得文档 Application revitApp = commandData.Application.Application; //取得应用程序 UIDocument uiDoc = commandData.Application.ActiveUIDocument; Selection sel = uiDoc.Selection; //Reference re = sel.PickObject(ObjectType.Element); Reference re = sel.PickObject(ObjectType.PointOnElement); ImportInstance dwg = revitDoc.GetElement(re) as ImportInstance; var geoObj = (dwg as Element).GetGeometryObjectFromReference(re); TaskDialog.Show("revit", geoObj.GetType().ToString()); //Transform transf = null; XYZ p1 = null; XYZ p2 = null; if (geoObj is Line) { Line l = geoObj as Line; p1 = l.GetEndPoint(0); p2 = l.GetEndPoint(1); TaskDialog.Show("revit", p2.X.ToString()); } return Result.Succeeded; } }}
