Adding layers using ArcGISDynamicMapServiceLayer

Question

I am right now adding individual layers using FeatureLayer but it takes quite some time to load as the map is for US Counties (3076 count). I tried to load it using ArcGISDynamicMapServiceLayer but I was not successful. It seems that ArcGISDynamicMapServiceLayer can load mapserver but not the layers in the mapserver.

I used the following code but it did not work.

var ftrLyr = new esri.layers.ArcGISDynamicMapServiceLayer(url, {
    visibleLayers: [1]
});

Is it not possible to load layers in a mapserver using DynamicMapService?

Answer 1

The parameter visibleLayers isn't an option used in the construction of an ArcGISDynamicMapServiceLayer. What you can do is call the setVisibleLayers method on the layer before adding it to the map. Here's an example using your example:

var ftrLyr = new esri.layers.ArcGISDynamicMapServiceLayer(url);

ftrLyr.setVisibleLayers([1]);

map.addLayer(ftrLyr);