FireDAC.Comp.DataSet.TFDDataSet.UndoLastChange

[–] Properties

Type: function

Visibility: public

Source:

FireDAC.Comp.DataSet.pas

FireDAC.Comp.DataSet.hpp

Delphi

function UndoLastChange(AFollowChange: Boolean): Boolean;

C++

bool __fastcall UndoLastChange(bool AFollowChange);

Description

Undoes the last modification to the dataset records.

Use UndoLastChange to undo the last modification to the dataset records and remove the change from the dataset change log.

The method is applicable to the datasets working when CachedUpdates is set to True.

If AFollowChange is True, then the current position in the dataset is set to the restored record. Otherwise the position remains unchanged.

To check whether the changed log is not empty, read the UpdatesPending property value. If it is True, then there are changes to undo.

procedure TForm1.btnUndoClick(ASender: TObject);
begin
  FDQuery1.UndoLastChange(True);
end;