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[Transaction(TransactionMode.Manual)]
    public class Command : IExternalCommand
    {
        readonly string path = @"C:\Users\41022\Desktop\TestRvt\项目1.rvt";
        //定义一个全局UIApplication，用来注销指定事件
        UIApplication uiApp = null;
        //定义一个字段通过属性变化来触发空闲事件
        public static Boolean IdleFlag = false;
        //记录DocumentChanged事件发生改变的构件
        //ElementId id = new ElementId(313106);
        ElementId id = null;

        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            uiApp = commandData.Application;
            UIDocument uiDoc = uiApp.ActiveUIDocument;
            Document Doc = uiDoc.Document;
            System.Diagnostics.Process.Start(path);
            uiApp.PostCommand(RevitCommandId.LookupPostableCommandId(PostableCommand.Door));//调用“门”命令，用户创建门
            uiApp.Idling += new EventHandler<IdlingEventArgs>(IdlingHandler);//先注册空闲事件
            uiApp.Application.DocumentChanged += new EventHandler<DocumentChangedEventArgs>(DocumentChangedForSomething);//再注册DocumentChanged事件 
            return Result.Succeeded;
        }

        private void DocumentChangedForSomething(object sender, DocumentChangedEventArgs e)
        {
            //listId.Clear();
            //ICollection<ElementId> collection = e.GetAddedElementIds();//获取创建的门的ids
            id = new ElementId(313106);
            IdleFlag = true;
            uiApp.Application.DocumentChanged -= new EventHandler<DocumentChangedEventArgs>(DocumentChangedForSomething);//注销本事件
        }

        public void IdlingHandler(object sender, IdlingEventArgs args)
        {
            UIApplication uiapp = sender as UIApplication;
            if (!IdleFlag)//true
            {
                return;//继续执行
            }
            ExecuteIdlingHandler.Execute(uiapp, id);//删除创建的门
            IdleFlag = false;
            uiApp.Idling -= new EventHandler<IdlingEventArgs>(IdlingHandler);//注销 
        }
    }