如何组织AxTOCControl里面的数据

如何组织AxTOCControl里面的数据，实际上是组织AXMapControl的数据，将添加的数据进行整理。代码在最后面。

思路参考自：

https://blog.csdn.net/u012488787/article/details/39028813 ，比想象的简单的多

加载图层事件：

http://resources.esri.com/help/9.3/ArcGISEngine/dotnet/ViewCodePages/a66f3104-3a61-4bbd-b1c4-310335e6bb1eForm1.cs.htm

http://zhihu.esrichina.com.cn/question/20551

http://help.arcgis.com/en/sdk/10.0/arcobjects_net/componenthelp/index.html#//004900000051000000

http://blog.sciencenet.cn/blog-971075-1016456.html

        #region 图层分组方法
        private void UpdateTOCControlLayers(AxMapControl axMap)
        {
            if (axMap.Map.LayerCount == 0)
            {
                return;
            }

            IMapLayers mapLayers = axMap.Map as IMapLayers;
            //设置axtoccontrol的首层名称为“图层”
            axMap.Map.Name = "图层";
            List<string> listGroupLyrNames = new List<string>() { "总规", "分规", "控规"};
            foreach (string groupLayerName in listGroupLyrNames)
            {
                IGroupLayer basemapGroupLayer = new GroupLayerClass();
                basemapGroupLayer.Name = groupLayerName;
                axMap.Map.AddLayer(basemapGroupLayer);
                //将所有要素图层作为二级目录
                IEnumLayer enumLayer = LayersGetUtil.GetEnumLayer(axMapControl1.Map);
                enumLayer.Reset();
                ILayer layer = enumLayer.Next();
                while (layer != null)
                {
                    //如果图层名截取的字符串跟图层组名称相同
                    if (GetGroupNameOfLayer(layer) == groupLayerName)
                    {

                            mapLayers.MoveLayerEx(null, basemapGroupLayer, layer, 0);

                    }
                    layer = enumLayer.Next();

                }
                basemapGroupLayer.Expanded = false;
            }
        }

        private string GetGroupNameOfLayer(ILayer layer)
        {
            string matchGroupName = null;
            IDataLayer dataLayer = layer as IDataLayer;
            IDatasetName datasetName = dataLayer.DataSourceName as IDatasetName;
            string groupName = datasetName.Name.Substring(0, 2);
            switch (groupName.ToUpper())
            {
                case "ZG":
                    matchGroupName = "总规";
                    break;
                case "FG":
                    matchGroupName = "分规";
                    break;
                case "KG":
                    matchGroupName = "控规";
                    break;

                default:
                    break;

            }
            return matchGroupName;
        }
        #endregion