TCustomGrid.OnValidateEntry property
Event handler signalled to perform validation for a cell value.
Declaration
property OnValidateEntry: TValidateEntryEvent read FOnValidateEntry write FOnValidateEntry;Description
OnValidateEntry is a
TValidateEntryEvent property with
the event handler signalled to perform validation for cells in the
ValidateEntry method. The OldValue argument contains the value
validated in the handler routine. Use the NewValue argument to return a
modified value from the handler routine.
The handler can raise an Exception if needed. It is caught in the calling routine (ValidateEntry), and forwarded to the HandleException method in the Application singleton.
Updated cell values are not validated if the event handler has not been assigned.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.