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TDataSet.BeforeCancel
TDataSet
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Occurs before an application executes a request to cancel changes to the active record.

property BeforeCancel: TDataSetNotifyEvent;

Description
Write a BeforeCancel event to take specific action before an application carries out a request to cancel changes. BeforeCancel is called by the Cancel method before it cancels a dataset operation such as Edit, Insert, or Delete.

An application might use the BeforeCancel event to record a user's changes in an undo buffer.


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