Using Dataset Events

Go Up to Understanding Datasets

Datasets have a number of events that enable an application to perform validation, compute totals, and perform other tasks. The events are listed in the following table:

Dataset events

Event	Description
BeforeOpen, AfterOpen	Called before/after a dataset is opened.
BeforeClose, AfterClose	Called before/after a dataset is closed.
BeforeInsert, AfterInsert	Called before/after a dataset enters Insert state.
BeforeEdit, AfterEdit	Called before/after a dataset enters Edit state.
BeforePost, AfterPost	Called before/after changes to a table are posted.
BeforeCancel, AfterCancel	Called before/after the previous state is canceled.
BeforeDelete, AfterDelete	Called before/after a record is deleted.
OnNewRecord	Called when a new record is created; used to set default values.
OnCalcFields	Called when calculated fields are calculated.

For more information about events for the TIBCustomDataSet component, see the online VCL Reference.

Topics

• Aborting a Method
• Using OnCalcFields