Visual Basic Reference
See Also Example Applies To
object.DataChanged [= boolean]
The DataChanged property syntax has these parts:
|object||An object expression that evaluates to an object in the Applies To list.|
|value||A Boolean expression that indicates whether data has changed, as described in Settings.|
The settings for boolean are:
|True||The data currently in the control isn't the same as in the current record.|
|False||(Default) The data currently in the control, if any, is the same as the data in the current record.|
When a data control moves from record to record, it passes data from fields in the current record to controls bound to the specific field or the entire record. As data is displayed in the bound controls, the DataChanged property is set to False. If the user or any other operation changes the value in the bound control, the DataChanged property is set to True. Simply moving to another record doesn't affect the DataChanged property.
When the data control starts to move to a different record, the Validate event occurs. If DataChanged is True for any bound control, the data control automatically invokes the Edit and Update methods to post the changes to the database.
If you don't wish to save changes from a bound control to the database, you can set the DataChanged property to False in the Validate event.
Inspect the value of the DataChanged property in your code for a control's Change event to avoid a cascading event. This applies to both bound and unbound controls.