private void btnRotate_Click(object sender, EventArgs e)
{
//I go to find the layer and then loop through all of the features and rotate them
var polygonLayer = (InMemoryFeatureLayer)mapView.FindFeatureLayer("PolygonLayer");
Collection <Feature> newFeatures = new Collection <Feature>();
PointShape center = polygonLayer.GetBoundingBox().GetCenterPoint();
foreach (var feature in polygonLayer.InternalFeatures)
{
// Here we need to clone the features and add them back to the layer
PolygonShape shape = (PolygonShape)feature.GetShape();
shape.Rotate(center, 10);
shape.Id = feature.Id;
Feature newFeature = new Feature(shape);
newFeature.ColumnValues.Add("DataPoint1", feature.ColumnValues["DataPoint1"]);
newFeatures.Add(newFeature);
}
polygonLayer.InternalFeatures.Clear();
foreach (var feature in newFeatures)
{
polygonLayer.InternalFeatures.Add(feature);
}
// We are only going to refresh the one overlay that draws the polygons. This saves us having toe refresh the background data.
mapView.Refresh(mapView.Overlays["PolygonOverlay"]);
}