Collapse All
AnyDAC
ContentsIndexHome
PreviousUpNext
TADDataSet.UndoLastChange Method
TADDataSet Class  TADDataSet Members  uADCompDataSet Namespace  Example 1  Example 2  public  See Also  Send Feedback

Undoes the last modification to the dataset records.

Group

public

Links
TADDataSet Class, TADDataSet Members, uADCompDataSet Namespace, Example 1, Example 2, public, See Also
Parameters
Parameters 
Description 
AFollowChange: Boolean 
A flag controlling current position in dataset. 
Returns

True, if a change was undone.

Description

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 in CachedUpdates = True mode. 

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

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

Syntax
function UndoLastChange(AFollowChange: Boolean): Boolean;
See Also
Example 1
procedure TForm1.btnUndoClick(ASender: TObject);
begin
  ADQuery1.UndoLastChange(True);
end;
Example 2

See AnyDAC\Samples\Comp Layer\TADMemTable\CachedUpdates sample for details.

What do you think about this topic? Send feedback!