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://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