Vcl.DBCtrls.TDBLookupControl.NullValueKey
Delphi
property NullValueKey: TShortCut read FNullValueKey write FNullValueKey default 0;
C++
__property System::Classes::TShortCut NullValueKey = {read=FNullValueKey, write=FNullValueKey, default=0};
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| property | protected | Vcl.DBCtrls.pas Vcl.DBCtrls.hpp |
Vcl.DBCtrls | TDBLookupControl |
Description
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.