ArcGIS Pro 3.1 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / MapView Class / FlashFeature Method / FlashFeature(SelectionSet) Method
The collection of layers and corresponding Object IDs to flash.
Example

In This Topic
    FlashFeature(SelectionSet) Method
    In This Topic
    Flash one or more features in the view simultaneously.
    Syntax
    public void FlashFeature( 
       SelectionSet features
    )
    Public Overloads Sub FlashFeature( _
       ByVal features As SelectionSet _
    ) 

    Parameters

    features
    The collection of layers and corresponding Object IDs to flash.
    Example
    Flash selected features
    public Task FlashSelectedFeaturesAsync()
    {
      return QueuedTask.Run(() =>
      {
        //Get the active map view.
        var mapView = MapView.Active;
        if (mapView == null)
          return;
    
        //Get the selected features from the map and filter out the standalone table selection.
    
        //At 2.x
        //var selectedFeatures = mapView.Map.GetSelection()
        //    .Where(kvp => kvp.Key is BasicFeatureLayer)
        //    .ToDictionary(kvp => (BasicFeatureLayer)kvp.Key, kvp => kvp.Value);
    
        ////Flash the collection of features.
        //mapView.FlashFeature(selectedFeatures);
    
        var selectedFeatures = mapView.Map.GetSelection();
    
        //Flash the collection of features.
        mapView.FlashFeature(selectedFeatures);
      });
    }
    
    Create a tool to identify the features that intersect the sketch geometry
    internal class CustomIdentify : MapTool
    {
      public CustomIdentify()
      {
        IsSketchTool = true;
        SketchType = SketchGeometryType.Rectangle;
    
        //To perform a interactive selection or identify in 3D or 2D, sketch must be created in screen coordinates.
        SketchOutputMode = SketchOutputMode.Screen;
      }
    
      protected override Task<bool> OnSketchCompleteAsync(Geometry geometry)
      {
        return QueuedTask.Run(() =>
        {
          var mapView = MapView.Active;
          if (mapView == null)
            return true;
    
          //Get all the features that intersect the sketch geometry and flash them in the view. 
          var results = mapView.GetFeatures(geometry);
          mapView.FlashFeature(results);
    
          var debug = String.Join("\n", results.ToDictionary()
                        .Select(kvp => String.Format("{0}: {1}", kvp.Key.Name, kvp.Value.Count())));
          System.Diagnostics.Debug.WriteLine(debug);
          return true;
        });
      }
    }
    
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3.0 or higher.
    See Also