ComponentOne DataObjects for .NET
BeforeFirstChange Event (BaseLogic)

C1.Data.2 Assembly > C1.Data Namespace > BaseLogic Class : BeforeFirstChange Event
Fired before first change is made to a row (a field value changes) after the row last entered edit mode.
Syntax
'Declaration
 
Public Event BeforeFirstChange As RowChangeEventHandler
public event RowChangeEventHandler BeforeFirstChange
Event Data

The event handler receives an argument of type RowChangeEventArgs containing data related to this event. The following RowChangeEventArgs properties provide information specific to this event.

PropertyDescription
The action that has occurred.  
The table object where the event has occurred.  
For a deleted row, in BaseLogic.AfterDelete event, the array of field values in the row before the row was deleted. This property is not set in events other than AfterDelete. This property must be used in BaseLogic.AfterDelete event to access row values because they are not accessible through regular row properties after the row has been deleted.  
For events BeforeEndEdit, AfterEndEdit, this property indicates whether the row has been modified while it was in edit mode. This property is often needed in BeforeEndEdit/ AfterEndEdit because data-bound controls begin edit mode when they position on a row and end edit mode when they leave the row, even if no changes have been made to the row in the process.  
Parent row.  
The row where the event has occurred.  
Remarks
Throwing an exception in this event disallows changes to the row.
See Also