Unit 'DBCtrls' Package
[Overview][Constants][Types][Classes][Procedures and functions][Index] [#lcl]

TCustomDBListBox.DataChange

Performs actions needed when the linked dataset is repositioned.

Declaration

Source position: dbctrls.pp line 364

protected procedure TCustomDBListBox.DataChange(

  Sender: TObject

); virtual; abstract;

Arguments

Sender

  

Object for the event notification.

Description

DataChange is an method used to perform actions needed when the control needs to be refreshed after a positioning the linked dataset. DataChange is an abstract virtual method in TCustomDBListBox, and must be implemented in a descendent class to perform the actions required for the control.

DataChange is assigned to the OnDataChange event handler in the TFieldDataLink instance used in data-aware controls.

See also

TFieldDataLink.OnDataChange

  

OnDataChange - event handler for a change in the data.

TDBListBox.DataChange

  

Implements the event handler signalled when data in the linked dataset has been changed.

TDBLookupListBox.DataChange

  

Performs actions needed when a new DataField value is selected using the lookup dataset.