CreateKeyframe Method

C#
Visual Basic (Declaration)

public Keyframe CreateKeyframe( 
   Layer layer,
   TimeSpan atTime,
   bool isVisibile,
   double transparency,
   AnimationTransition transition
)

Public Function CreateKeyframe( _
   ByVal layer As Layer, _
   ByVal atTime As TimeSpan, _
   ByVal isVisibile As Boolean, _
   ByVal transparency As Double, _
   ByVal transition As AnimationTransition _
) As Keyframe

Parameters

layer: The layer associated with the keyframe.
atTime: The time at which to insert the keyframe in the track.
isVisibile: A value indicating if the layer is visible.
transparency: The value of the transparency.
transition: The transition for the transparency of the layer. In the UI the default is ArcGIS.Core.CIM.AnimationTransition.Linear.

If a keyframe already exists at that time it will be overwritten. The time is rounded to the nearest millisecond.

Create a new layer keyframe.

C#

public void CreateLayerKeyframe(Layer layer, double transparency, TimeSpan atTime)
{
  var mapView = MapView.Active;
  if (mapView != null)
    return;

  var animation = mapView.Map.Animation;
  var layerTrack = animation.Tracks.OfType<LayerTrack>().First(); //There will always be only 1 LayerTrack in the animation.
  layerTrack.CreateKeyframe(layer, atTime, true, transparency, ArcGIS.Core.CIM.AnimationTransition.Linear);
}

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

LayerTrack Class
LayerTrack Members