/// <summary>
/// Rotates the first feature in the cityLimits layer and displays the result on the map.
/// </summary>
private void RotateShape_OnClick(object sender, EventArgs e)
{
LayerOverlay layerOverlay = (LayerOverlay)mapView.Overlays["layerOverlay"];
ShapeFileFeatureLayer cityLimits = (ShapeFileFeatureLayer)layerOverlay.Layers["cityLimits"];
InMemoryFeatureLayer rotatedLayer = (InMemoryFeatureLayer)layerOverlay.Layers["rotatedLayer"];
// Query the cityLimits layer to get all the features
cityLimits.Open();
var features = cityLimits.QueryTools.GetAllFeatures(ReturningColumnsType.NoColumns);
cityLimits.Close();
// Rotate the first feature using it's center point as the anchor
var rotate = AreaBaseShape.Rotate(features[0], features[0].GetShape().GetCenterPoint(), Convert.ToSingle(rotateDegree.Text));
// Add the rotated shape into rotatedLayer 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.
rotatedLayer.InternalFeatures.Clear();
rotatedLayer.InternalFeatures.Add(new Feature(rotate));
// Redraw the layerOverlay to see the rotated feature on the map
layerOverlay.Refresh();
}
