[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'DB' (#fcl)

TDataSource.OnDataChange

Called whenever data changes in the current record

Declaration

Source position: db.pas line 1936

published property TDataSource.OnDataChange : TDataChangeEvent
  read FOnDataChange
  write FOnDataChange;

Description

OnDatachange is called whenever a field value changes: if the Field parameter is set, a single field value changed. If the Field parameter is Nil, then the whole record changed: when the dataset is opened, when the user scrolls to a new record. This event handler can be set to react to data changes: to update the contents of non-DB-aware controls for instance. The event is not called when the datasource is not enabled.

See also

TDatasource.OnUpdateData

  

Called whenever the data in the dataset must be updated

TDatasource.OnStateChange

  

Called whenever the state of the dataset changes

TDataset.AfterScroll

  

Event triggered after the cursor has changed position.

TField.OnChange

  

Event triggered when the field's value has changed

TDatasource.Enabled

  

Enable or disable sending of events


Documentation generated on: May 14 2021