/// <summary>
/// Scales the first feature in the cityLimits layer and displays the result on the map.
/// </summary>
private void ScaleShape_OnClick(object sender, EventArgs e)
{
LayerOverlay layerOverlay = (LayerOverlay)mapView.Overlays["layerOverlay"];
ShapeFileFeatureLayer cityLimits = (ShapeFileFeatureLayer)layerOverlay.Layers["cityLimits"];
InMemoryFeatureLayer scaledLayer = (InMemoryFeatureLayer)layerOverlay.Layers["scaledLayer"];
// Query the cityLimits layer to get all the features
cityLimits.Open();
var features = cityLimits.QueryTools.GetAllFeatures(ReturningColumnsType.NoColumns);
cityLimits.Close();
// Scale the first feature by the scaleFactor TextBox on the UI
var scale = AreaBaseShape.ScaleTo(features[0].GetShape(), Convert.ToSingle(scaleFactor.Text));
// Add the scaled shape into scaledLayer to display the result.
// If this were to be a permanent change to the cityLimits FeatureSource, you would modify the
// underlying data using BeginTransaction and CommitTransaction instead.
scaledLayer.InternalFeatures.Clear();
scaledLayer.InternalFeatures.Add(new Feature(scale));
// Redraw the layerOverlay to see the scaled feature on the map
layerOverlay.Refresh();
}
