Pricing events

This topic describes events available when pricing information is updated in Episerver Commerce. The events are handled through the CatalogKeyEventBroadcaster class. 

Listening to events

To listen to new events, register your method to the pricing event of the CatalogKeyEventBroadcaster class:

public event EventHandler<PriceUpdateEventArgs> PriceUpdated;

To listen to remote events, first get the event from Events engine.

public void AddEvent()
  {
    Event ev = Event.Get(CatalogKeyEventBroadcaster.CatalogKeyEventGuid);
    ev.Raised += CatalogKeyEventUpdated;
  }

private void CatalogKeyEventUpdated(object sender, EventNotificationEventArgs e)
  {
    var eventArgs = (CatalogKeyEventArgs)DeSerialize((byte[])e.Param);
    var priceUpdateEventArgs = eventArgs as PriceUpdateEventArgs;
    if (priceUpdateEventArgs != null)
      {
         RemotePriceUpdated(sender, priceUpdateEventArgs);
      }
  }

private void RemotePriceUpdated(object sender, PriceUpdateEventArgs priceUpdatedEventArgs)
  {
     //Your action when prices are updated remotely.
  }

protected virtual CatalogKeyEventArgs DeSerialize(byte[] buffer)
  {
     var formatter = new BinaryFormatter();
     var stream = new MemoryStream(buffer);
     return formatter.Deserialize(stream) as CatalogKeyEventArgs;
  }

Triggering events

When you save prices through the default implementation, the event is automatically triggered. In a custom implementation of one of these interfaces, the event must be triggered for the system to know when there are price changes.

To broadcast events, use CatalogKeyEventBroadcaster class. This class has one public method for triggering pricing events:

public virtual void OnPriceUpdated(object source, PriceUpdateEventArgs args)

Whenever changes are done to the pricing system, call the method to raise an event.

To trigger an event in your pricing system implementation, add the following code to your void SetCatalogEntryPrices(IEnumerable<CatalogKey> catalogKeys, IEnumerable<IPriceValue> priceValues); method:

_broadcaster.OnPriceUpdated(this, new PriceUpdateEventArgs(catalogKeys.ToList()));

Last updated: Oct 24, 2016