Occurs when the fields in the collection change, usually as the result of a System.Web.UI.StateManagedCollection.Clear, DataControlFieldCollection.Insert(int, DataControlField), DataControlFieldCollection.Remove(DataControlField) or DataControlFieldCollection.Add(DataControlField) method call. This event is also raised anytime a System.Web.UI.WebControls.DataControlField in the collection raises its FieldChanged event.
The DataControlFieldCollection.FieldsChanged event is raised when the System.Web.UI.StateManagedCollection.Clear, DataControlFieldCollection.Insert(int, DataControlField), or DataControlFieldCollection.Remove(DataControlField) method is called.
For more information about handling events, see Consuming Events.