Vcl.DBCtrls.TDBLookupListBox.NullValueKey
Delphi
property NullValueKey: TShortCut read FNullValueKey write FNullValueKey default 0;
C++
__property NullValueKey = {default=0};
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| property | published | Vcl.DBCtrls.pas Vcl.DBCtrls.hpp |
Vcl.DBCtrls | TDBLookupListBox |
Description
Specifies the key combination that assigns a blank value to the associated field.
Vcl.DBCtrls.TDBLookupListBox.NullValueKey inherits from Vcl.DBCtrls.TDBLookupControl.NullValueKey. All content below this line refers to Vcl.DBCtrls.TDBLookupControl.NullValueKey.
Specifies the key combination that assigns a blank value to the associated field.
Set NullValueKey to let users enter a "blank" value into the associated field. When the user types the key combination that this shortcut represents, the associated field is cleared.
Tip: Use the ShortCut function or the TextToShortCut function to create a value to assign to NullValueKey.