Controlling layer visibility of a map service from code

Question

Hi,

I am trying to control the layer visibility of a map service in code behind.  I thought this would be simple, but I am having a hard time getting this done. I can get a hold of the service from my Map Control, called map, using map.Layers[0] for example.  This contains an array of LayerInfo.  If I loop on this array, for any of the LayerInfo, there is no settable visibility property.  The LayerInfo only has a DefaultVisibility property which is a boolean indicating the layer's default visibility.  I also tried looking in the MapLegend control without success.  Is there an easy way to do this that I have not found yet?

Thanks,
Paul

PaulHuppé · Answer

Thanks Terry, this is what I was looking for.
Paul

TerryGiles · Answer

Assuming the layer you're after is of type ArcGISDynamicMapServiceLayer, use the VisibleLayers property to control which sublayers are displayed.  It's an array of Int so just add/remove the sublayer index from that.

int[] myVisibleLayers = { 1, 2, 4 };  //sublayers 0 & 3 will not display 
 myArcGISDynamicMapServiceLayer.VisibleLayers = myVisibleLayers;