ArcGISWindowsPhoneSDK.InfoWindowDynamic.dispatcherTimer_Tick C# (CSharp) Méthode

        void dispatcherTimer_Tick(object sender, EventArgs e)
        {
            _infoWindow.IsOpen = false;

            QueryTask queryTask =
                new QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/4");
            Query query = new Query()
            {
                Geometry = _tapPoint,
                OutSpatialReference = MyMap.SpatialReference
            };
            query.OutFields.Add("NAME");

            queryTask.ExecuteCompleted += (s, evt) =>
            {
                if (evt.FeatureSet.Features.Count > 0)
                {
                    _infoWindow.Anchor = _tapPoint;
                    (_infoWindow.Content as TextBlock).Text = evt.FeatureSet.Features[0].Attributes["NAME"] as string;
                    _infoWindow.IsOpen = true;
                }
            };
            queryTask.ExecuteAsync(query);
            _dispatcherTimer.Stop();
        }