I'm trying to figure out how to trap the following error and display a more friendly message.

DELETE statement conflicted with TABLE REFERENCE constraint 'FK

I'm using  ASP.NET 2.0 Framework - Detailsview control using an ObjectDataSource

I've tried placing it in the following, but no success:

DetailView1 ItemDeleting & ItemDeleted

ObjectDataSource1 Deleting & Deleted

Page Load & Unload

I'm not sure which event the error is occuring in, but you can catch any error that does occur by overriding the OnError method of the page and putting your custom exception handling logic in that method.

protected override void OnError(EventArgs e)
{
     Exception ex = Server.GetLastError();
     // Do your custom stuff here
     base.OnError(e);
}