protected virtual void OnServiceDetailsDownloadCompleted(ServiceDetailsDownloadCompletedEventArgs args)
{
if (ServiceDetailsDownloadCompleted != null)
{
ServiceDetailsDownloadCompleted(this, args);
}
}
protected async override void OnServiceDetailsDownloadCompleted(ServiceDetailsDownloadCompletedEventArgs args)
{
// Workaround for the fact that DataContractJsonSerializer doesn't call the default contructor
// http://msdn.microsoft.com/en-us/library/system.runtime.serialization.datacontractserializer.aspx
if (ServiceInfo != null && ServiceInfo.SpatialReference != null)
{
if (ServiceInfo.SpatialReference.WKID == default(int))
{
ServiceInfo.SpatialReference.WKID = -1;
}
}
Uri finalUrl = new Uri(string.Format("{0}/layers?f=json", Uri));
if (webClient == null)
{
webClient = new ArcGISWebClient();
}
webClient.ProxyUrl = ProxyUrl;
try
{
ArcGISWebClient.DownloadStringCompletedEventArgs result =
await webClient.DownloadStringTaskAsync(finalUrl, args);
processResult(result);
}
catch
{
base.OnServiceDetailsDownloadCompleted(args);
}
}
private void processResult(ArcGISWebClient.DownloadStringCompletedEventArgs e)
{
if (e.Cancelled)
{
return;
}
ServiceDetailsDownloadCompletedEventArgs eventArgs = e.UserState as ServiceDetailsDownloadCompletedEventArgs;
if (e.Error != null)
{
base.OnServiceDetailsDownloadCompleted(eventArgs);
return;
}
string json = e.Result;
Exception ex = Utils.CheckJsonForException(json);
if (ex != null) // if the service is pre-10.x then it doesn't support /layers operation
{
base.OnServiceDetailsDownloadCompleted(eventArgs);
return;
}
try
{
AllLayersResponse response = JsonSerializer.Deserialize <AllLayersResponse>(e.Result);
_layersInService = response.Layers;
if (_layersInService != null)
{
_notSupportedLayerIds = new List <int>();
foreach (MapServiceLayerInfo mapServiceLayerInfo in _layersInService)
{
if (Utility.RasterLayer.Equals(mapServiceLayerInfo.Type) || Utility.ImageServerLayer.Equals(mapServiceLayerInfo.Type))
{
_notSupportedLayerIds.Add(mapServiceLayerInfo.ID);
}
}
}
}
catch (Exception)
{
// Ok to swallow
}
base.OnServiceDetailsDownloadCompleted(eventArgs);
}
