ArcGISRuntime.WPF.Samples.FeatureLayerQuery.FeatureLayerQuery.QueryStateFeature C# (CSharp) Метод

        private async Task QueryStateFeature(string stateName)
        {
            try
            {
                // Create a query parameters that will be used to Query the feature table  
                QueryParameters queryParams = new QueryParameters();

                // Construct and assign the where clause that will be used to query the feature table 
                queryParams.WhereClause = "upper(STATE_NAME) LIKE '%" + (stateName.ToUpper()) + "%'";

                // Query the feature table 
                FeatureQueryResult queryResult = await _featureTable.QueryFeaturesAsync(queryParams);

                // Cast the QueryResult to a List so the results can be interrogated
                var features = queryResult.ToList();

                if (features.Any())
                {
                    // Get the first feature returned in the Query result 
                    Feature feature = features[0];

                    // Add the returned feature to the collection of currently selected features
                    _featureLayer.SelectFeature(feature);

                    // Zoom to the extent of the newly selected feature
                    await myMapView.SetViewpointGeometryAsync(feature.Geometry.Extent);
                }
                else
                {
                    MessageBox.Show("State Not Found!", "Add a valid state name.");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Sample error", "An error occurred" + ex.ToString());
            }
        }
    }