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

# TDataSet.BeforeCancel

Event triggered before a Cancel operation.

## Declaration

Source position: db.pas line 1632

`public property TDataSet.BeforeCancel: TDataSetNotifyEvent read FBeforeCancel write FBeforeCancel;`

## Description

BeforeCancel is triggered at the start of the TDataset.Cancel operation, when the state is still one of the editing states (dsEdit,dsInsert). The event handler can be used to abort the cancel operation: if an exception is raised during the event handler, then the cancel operation stops. If the dataset was not in one of the editing states when the Cancel method was called, then the event is not triggered.

## See also

TDataset.AfterCancel |  | Event triggered after a Cancel operation.
TDataset.Cancel |  | Cancel the current editing operation
TDataset.State |  | Current operational state of the dataset

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