arcengine实现右键菜单打开/关闭所有图层
参考资料: http://developer.51cto.com/art/201104/256774.htm
参照后自己做的:
关于右键菜单的几个有价值的网址:
http://blog.csdn.net/my_lord_/article/details/52787300
http://www.cnblogs.com/hans_gis/archive/2011/04/21/2023366.html
http://www.gissky.net/Item/1544.aspx
https://www.cnblogs.com/xiuchuan/p/6850423.html
https://www.cnblogs.com/fengzhiwei-blog/p/4934495.html
https://max.book118.com/html/2016/1226/77234014.shtm