/// <summary>
/// Retrieves the demographics and other relevant
/// characteristics associated with the surrounding area.
/// </summary>
/// <param name="parameters">input parameters to Geoenrichment Service.</param>
/// <param name="userToken">user token.</param>
public void ExecuteAsync(GeoenrichmentParameter parameters, object userToken = null)
{
// Web requests made through ArcGISWebClient takes advantage of the IdentityManager.
var client = new ArcGISWebClient();
client.DownloadStringCompleted += (s, e) =>
{
if (e.Cancelled)
OnExecuteCompleted(new GeoenrichmentEventArgs(new OperationCanceledException(), e.UserState));
else if (e.Error != null)
OnExecuteCompleted(new GeoenrichmentEventArgs(e.Error, e.UserState));
else
{
var json = e.Result;
var serviceException = ServiceException.FromJson(json);
if(serviceException != null)
OnExecuteCompleted(new GeoenrichmentEventArgs(serviceException, e.UserState));
OnExecuteCompleted(new GeoenrichmentEventArgs(GeoenrichmentResult.FromJson(json), e.UserState));
}
};
client.DownloadStringAsync(new Uri(string.Format("{0}/enrich", ServiceUrl)),
parameters.GetParameters(),
ArcGISWebClient.HttpMethods.Auto, userToken);
}
private void RunGeoenrichmentTask(MapPoint mp)
{
MyProgressBar.IsIndeterminate = true;
var task = new GeoenrichmentTask(GEOENRICHMENT_URL);
task.ExecuteCompleted += (s, e) =>
{
MyProgressBar.IsIndeterminate = false;
if (e.Error != null)
MessageBox.Show(string.Format("GeoEnrichmentTask Failed with error: '{0}'", e.Error.Message));
else if (e.Result != null &&
e.Result.Results != null
&& e.Result.Results.Count > 0)
{
var result = e.Result.Results.FirstOrDefault();
if (result.FeatureSets != null && result.FeatureSets.Count > 0)
{
var featureSet = result.FeatureSets.FirstOrDefault();
if (featureSet.Features != null && featureSet.Features.Count > 0)
{
var graphic = featureSet.Features.FirstOrDefault();
UpdateChart(graphic.Attributes, featureSet.Fields);
}
}
}
};
var parameters = new GeoenrichmentParameter()
{
OutSpatialReference = MyMap.SpatialReference,
StudyAreaOptions = new StudyAreaOptions()
{
AreaType = "RingBuffer",
BufferUnits = "esriMiles",
BufferRadii = new int[] { 1 }
},
UseData = new UseData() { SourceCountry = "US" }
};
parameters.StudyAreas.Add(new Graphic() { Geometry = mp });
parameters.DataCollections.Add("HouseholdsByIncome");
parameters.IntersectingGeographies.Add(new IntersectingGeography()
{
GeographyLayer = "US.Counties",
SourceCountry = "US"
});
parameters.IntersectingGeographies.Add(new IntersectingGeography()
{
GeographyLayer = "US.States",
SourceCountry = "US"
});
task.ExecuteAsync(parameters);
}
