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I have five layers: polygon, line, and point with a single IRasterLayer file. I am programmatically setting the ILayer.Visible attribute for the Raster but the layer is not refreshing. If I zoom in, or zoom out, then it refreshes properly.

I tried these two methods:

mapControl.Refresh(esriViewDrawPhase.esriViewAll, null, null); 

But they didn't refresh my map. What method is stronger that this for refreshing the entire map?

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Strange, have you tried mapControl.ActiveView.Refresh()? – Kirk Kuykendall Sep 14 '11 at 15:58
@Kirk Kuykendall Thanks Kirk, I had forgotten about that one. If you make an answer I'll mark as correct. – patrick Sep 14 '11 at 16:07
up vote 2 down vote accepted

Apparently mapcontrol.ActiveView.Refresh() is more reliable.

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