private async void MyMap_MouseClick(object sender, ESRI.ArcGIS.Client.Map.MouseEventArgs e)
{
try
{
if (_cts != null)
{
_cts.Cancel();
}
_cts = new CancellationTokenSource();
Graphic clickGraphic = new Graphic();
clickGraphic.Symbol = LayoutRoot.Resources["DefaultMarkerSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol;
clickGraphic.Geometry = e.MapPoint;
clickGraphic.Geometry.SpatialReference = MyMap.SpatialReference;
_pointAndBufferGraphicsLayer.Graphics.Clear();
_resultsGraphicsLayer.Graphics.Clear();
clickGraphic.SetZIndex(2);
_pointAndBufferGraphicsLayer.Graphics.Add(clickGraphic);
ESRI.ArcGIS.Client.Tasks.BufferParameters bufferParams = new ESRI.ArcGIS.Client.Tasks.BufferParameters()
{
BufferSpatialReference = new SpatialReference(4326),
OutSpatialReference = MyMap.SpatialReference,
Unit = LinearUnit.Meter,
};
bufferParams.Distances.Add(100);
bufferParams.Features.Add(clickGraphic);
BufferResult bufferResult = await _geometryService.BufferTaskAsync(bufferParams, _cts.Token);
Graphic bufferGraphic = new Graphic();
bufferGraphic.Geometry = bufferResult.Results[0].Geometry;
bufferGraphic.Symbol = LayoutRoot.Resources["BufferSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol;
bufferGraphic.SetZIndex(1);
_pointAndBufferGraphicsLayer.Graphics.Add(bufferGraphic);
ESRI.ArcGIS.Client.Tasks.Query query = new ESRI.ArcGIS.Client.Tasks.Query();
query.ReturnGeometry = true;
query.OutSpatialReference = MyMap.SpatialReference;
query.Geometry = bufferGraphic.Geometry;
query.OutFields.Add("OWNERNME1");
QueryResult queryResult = await _queryTask.ExecuteTaskAsync(query, _cts.Token);
if (queryResult.FeatureSet.Features.Count < 1)
{
MessageBox.Show("No features found");
return;
}
foreach (Graphic selectedGraphic in queryResult.FeatureSet.Features)
{
selectedGraphic.Symbol = LayoutRoot.Resources["ParcelSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol;
_resultsGraphicsLayer.Graphics.Add(selectedGraphic);
}
}
catch (Exception ex)
{
if (ex is ServiceException)
{
MessageBox.Show(String.Format("{0}: {1}", (ex as ServiceException).Code.ToString(), (ex as ServiceException).Details[0]), "Error", MessageBoxButton.OK);
return;
}
}
}