I have attached code in an external assembly to the Ticket.OnAfterUpdate event.  This code modifies the value of NeededByDate.  How do I call a refresh of the Ticket mainview from the external assembly code?

In the code snippet where you call your external assembly just set the property to RefreshData to true.

Ah sorry just realised its an OnAFterUpdate...anyway if the save button has "RefreshData" set to true that should still work.

Unless your onafterupdate is updating things in SQL (in which case the hibernate entity model will not know about your changes yet). If this is the case you should be using the Hibernate entity model to update the ticket or whatever you are updating. If you are using SQL (which you really shouldnt as it can cause locks among other things) you can invalidate the cache for the ticket record in qiestion which will cause Hibernate to reload the entity from the DB. Last resort that one....or you could run the SQL through the NHIbernate session.

The business rules and events are intentionally separated from the UI. In short, you can't. The events have no knowledge of the UI - this is a good thing. The events fire from not only UI events, but any data change events from SData, mobile, etc. If you want the data on the UI to refresh, you'll need to do that from the UI layer. As Nick mentioned, you could add a RefreshData action on a control or controls to cause the screen to refresh/reload data from the bound entity.

Thanks guys very much for this guidance.  I am rethinking how to do the required updates inside the entity model and make things easier.