Revit二次開發——使用PickObject拾取的Edge轉爲Curve

通過鼠標拾取模型的邊Edge，然後轉換爲Curve

		Reference refer = uiDoc.Selection.PickObject(ObjectType.Edge,"Select edge");
        Edge curv = doc.GetElement(refer).GetGeometryObjectFromReference(refer) as Edge;
        Curve cur = curv.AsCurve();