vcl-cxcustomdata-dot-tcxcustomdatacontroller-dot-underscore-events.md
The base class for all data controllers that manage data from different sources.
| Name | Description |
|---|---|
| OnAfterCancel | Occurs after canceling the modifications to the active record if working in unbound or provider mode. |
| OnAfterDelete | Allows you to perform specific actions after the data controller deletes a record. |
| OnAfterInsert | Occurs after inserting a new record if working in unbound or provider mode. |
| OnAfterPost | Occurs after saving changes made to a record if working in unbound or provider mode. |
| OnBeforeCancel | Occurs before canceling modifications to the active record if working in unbound or provider mode. |
| OnBeforeDelete | Allows you to perform specific actions when the data controller is about to delete a record. |
| OnBeforeImmediatePost | |
| OnBeforeInsert | Occurs before inserting a new record if working in unbound or provider mode. |
| OnBeforePost | Occurs before saving changes made to the modified record if working in unbound or provider mode. |
| OnCanSelectRecord protected | |
| OnCompare | Allows you to implement a custom sorting algorithm. |
| OnDataChanged | Occurs on changing data provided by the data controller. |
| OnDetailCollapsed | Occurs after the details of a particular master record have been collapsed. |
| OnDetailCollapsing | Occurs when the details of a particular master record are about to be collapsed. |
| OnDetailExpanded | Occurs after the details of a particular master record have been expanded. |
| OnDetailExpanding | Occurs when the details of a particular master record are about to be expanded. |
| OnFilterRecord | Allows you to implement a custom data filtering algorithm. |
| OnFindCriteriaBeforeChange | Enables you to identify and track changes made to the data search criteria before they take effect on the data controller. |
| OnFindCriteriaChanged | Enables you to identify and track all data search criteria changes applied to the data controller. |
| OnGroupingChanged | Occurs after data grouping is changed. |
| OnNewRecord | Allows you to perform actions when the data controller is about to focus a new inserted record. |
| OnRecordChanged | Fires in response to data changes. |
| OnSortingChanged | Allows you to respond to sorting changes. |
| OnUpdateControl |
See Also