/// <summary>
/// 获取图层所在的最低一级组图层。
/// </summary>
/// <param name="map">地图对象。</param>
/// <param name="layer">图层对象。</param>
/// <returns>图层所在的组图层或者null</returns>
public static IGroupLayer GetBelongGroupLayer(IMap map, ILayer layer)
{
IEnumLayer mapGroupLayers = LayerUtil.GetMapGroupLayers(map, true);
IGroupLayer groupLayer = mapGroupLayers.Next() as IGroupLayer;
if (groupLayer != null)
{
Predicate <ILayer> layerPredicate = currentLayer => currentLayer == layer;
while (groupLayer != null)
{
if (LayerUtil.GetLayerOfGroupLayer(groupLayer, layerPredicate, false) != null)
{
if (groupLayer != null)
{
return(groupLayer);
}
}
groupLayer = (mapGroupLayers.Next() as IGroupLayer);
}
}
return(null);
}