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

# TDataSet.OnPostError

Event triggered when a post operation fails.

## Declaration

Source position: db.pas line 1645

`public property TDataSet.OnPostError: TDataSetErrorEvent read FOnPostError write FOnPostError;`

## Description

OnPostError is triggered when the TDataset.Post method fails to post the changes in the dataset buffer to the underlying database, because the database engine reported an error. The event handler can be used to indicate what the response to the failed post operation should be. To this end, it gets the exception object passed to it (parameter E), and it can examine this object to return an appropriate action in the DataAction parameter. The following responses are supported:

daFail
  The operation should fail (an exception will be raised)
daAbort
  The operation should be aborted (edits are undone, and an EAbort exception is raised)
daRetry
  Retry the operation.

For more information, see also the description of the TDatasetErrorEvent event handler type.

## See also

TDatasetErrorEvent |  | Error handling callback
TDataset.Post |  | Post pending edits to the database.
TDataset.OnDeleteError |  | Event triggered when a delete operation fails.
TDataset.OnEditError |  | Event triggered when an edit operation fails.

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