Get Layer type in DynamicMapService

deleted-user-ATjHIWsdQYmT

Is there a way to determine the type of layer(s) in a map service?  When looping through all the layers in my map service I would like to know what kind of layers they are.  I thought maybe there would be a property in the LayerInfo class but there is not.  Any Ideas?

DominiqueBroux

To get the layer type by quering the 'layers' REST resource.

1) Get the JsonReader util class I attached
2) Define the datacontracts corresponding to the 'layers' end point:

 
namespace DataContracts
{
  [DataContract]
  public class LayersData
  {
    [DataMember(Name = "layers")]
    public IEnumerable<LayerData> Layers { get; set; }
  }
 
  [DataContract]
  public class LayerData // Only data for the sample -> to complete if needed
  {
    [DataMember(Name = "id")]
    public int Id { get; set; }
    [DataMember(Name = "type")]
    public String Type { get; set; }
    [DataMember(Name = "defaultVisibility")]
    public bool DefaultVisibility { get; set; }
  }
}

3) Get asynchronously the layer infos with code like:

 
void GetLayersAsync()
{
  var json = new JsonReader<LayersData>();
  json.OnCompleted += json_OnCompleted;
  json.GetData("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/layers?f=json");
}
void json_OnCompleted(object sender, CompletedEventsArg<LayersData> e)
{
  var layers = e.Result.Layers;
  if (layers != null)
 {
    // For sample : create an array with visible layers of type "Feature Layer"
    int[] visibleFeatureLayers = layers.Where(layer => layer.DefaultVisibility && layer.Type == "Feature Layer").Select(layer => layer.Id).ToArray();
    .........
  }
}

JsonReader.zip

Screenshot 2025-06-06 at 9.43.40 AM.png