ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Core.DeviceLocation.Events Namespace / SnapshotChangedEvent Class / Subscribe Method
The delegate that gets executed when the event is published.
When false the ArcGIS.Core.Events.CompositePresentationEvent<TPayload> will maintain a weak delegate reference to the subscriber. Using a weak delegate reference relieves the subscriber from the need to unsubscribe to enable proper garbage collection.
Example

In This Topic
    Subscribe Method (SnapshotChangedEvent)
    In This Topic
    Subscribe to the SnapshotChangedEvent.
    Syntax

    Parameters

    action
    The delegate that gets executed when the event is published.
    keepSubscriberAlive
    When false the ArcGIS.Core.Events.CompositePresentationEvent<TPayload> will maintain a weak delegate reference to the subscriber. Using a weak delegate reference relieves the subscriber from the need to unsubscribe to enable proper garbage collection.

    Return Value

    A ArcGIS.Core.Events.SubscriptionToken that uniquely identifies the added subscription.
    Example
    Subscribe to Location Snapshot event
    private void SubscribeToSnapshotEvents()
    {
      SnapshotChangedEvent.Subscribe(OnSnapshotChanged);
    }
    private void OnSnapshotChanged(SnapshotChangedEventArgs args)
    {
      if (args == null)
        return;
    
      var snapshot = args.Snapshot as NMEASnapshot;
      if (snapshot == null)
        return;
    
      QueuedTask.Run(() =>
      {
        var pt = snapshot.GetPositionAsMapPoint();
        if (pt?.IsEmpty ?? true)
          return;
    
        // access properties
        var alt = snapshot.Altitude;
        var dt = snapshot.DateTime;
        var vdop = snapshot.VDOP;
        var hdop = snapshot.HDOP;
        // etc
    
        //TODO: use the snapshot
      });
    }
    Requirements

    Target Platforms: Windows 11, Windows 10, Windows 8.1

    See Also