engine添加图层按照点线面顺序来显示

将IMapLayers.InsertLayer 中的autoArrange 设置为true就可以了，代码如下 

                ILayer pLayer = pFeatureLayer as ILayer; 

                IMapLayers pMapLayers = m_mapControl.Map as IMapLayers;

                pMapLayers.InsertLayer(pLayer, true, 0);