Revit 二次开发 获取选中的对象

 1 //获取选中对象
 2 
 3 [TransactionAttribute(Autodesk.Revit.Attributes.TransactionMode.Manual)]
 4 public class getSelectEle : IExternalCommand
 5 {
 6 
 7     public Result Execute(ExternalCommandData commandData, ref string messages, ElementSet elements)
 8     {
 9           GetSelectionElement(commandData, elements);
10            return Result.Succeeded;
11     }
12 
13 
14     public void GetSelectionElement(ExternalCommandData   commandData, ElementSet elements)
15     {
16         UIApplication app = commandData.Application;
17         Selection sel = app.ActiveUIDocument.Selection;
18         ElementSet es = sel.Elements;
19         if (es.Size > 0)
20         {
21             string seleStr = "";
22             foreach (Element selitem in es)
23             {
24                 seleStr += selitem.Id + "," + selitem.Name + "\n";
25             }  
26             TaskDialog.Show("all Selection", seleStr);
27         }
28 
29      } 
30 }