The OnMapReplaced event is triggered whenever the IMapControl2::Map is replaced by another map,
such as when the IMapControl2::LoadMxFile method is used or when
the map property is explicitly replaced. Use this event to keep in synch with
the current
map.
问:这个方法在什么情况下被触发呢?
答:当MapControl 的地图被另一个地图替换时被触发。
问:为什么加载shp等数据时该方法不会被触发?
答:因为MapControl被初始化的时候就默认创建了一个地图文档,新加载的shp数据只是加载到了这个原始的地图文档中,并没有被替换,故该方法不会被触发。
问:那要怎么样才可以触发该事件?
答:加载地图文档,.mxd格式的数据就会触发该事件。
问:那我不想加载地图文档,只想加载shp数据该怎么实现鹰眼效果?
答:用OnAfterScreenDraw()方法。OnAfterScreenDraw
is triggered after the IDisplayEvents::DisplayFinished event is called
on the map‘s screen display. The hdc represents the device context on the screen
display.
AE开发关于OnMapReplaced方法的使用原理,布布扣,bubuko.com
原文地址:http://www.cnblogs.com/zzkgis/p/3742115.html