wpf arcglobe +c# 三维缩放到图层

/// <summary>
        /// 地图缩放到图层
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button5_Click(object sender, RoutedEventArgs e)
        {
            ESRI.ArcGIS.Analyst3D.IScene _Scene = _GlobeControl.Globe as ESRI.ArcGIS.Analyst3D.IScene;
            ESRI.ArcGIS.Carto.ILayer _ILayer = _Scene.get_Layer(0);//获取要缩放的图层
            ESRI.ArcGIS.Geometry.IEnvelope _IEnvelope = _ILayer.AreaOfInterest.Envelope;
            ICamera _ICamera = _GlobeControl.GlobeDisplay.ActiveViewer.Camera;
            IGlobeCamera _IGlobeCamera = _ICamera as IGlobeCamera;
            ISceneViewer _ISceneViewer = _GlobeControl.GlobeDisplay.ActiveViewer;
            _IGlobeCamera.SetToZoomToExtents(_IEnvelope, _GlobeControl.Globe, _ISceneViewer);
        }