/// <summary>
/// 遍历地图的所有图层，对图层执行操作
/// </summary>
/// <param name="map"></param>
/// <param name="action">对图层执行的操作</param>
public static void EnumLayer(this IMap map, Action <ILayer> action)
{
for (int i = 0; i < map.LayerCount; i++)
{
ILayer layer = map.get_Layer(i);
if (layer is IGroupLayer)
{
layer.EnumLayerInGroupLayer(action);
}
else
{
action(layer);
}
}
}