Kbase P129767: SCREEN-VALUE attribute of of a COMBO-BOX using LIST-ITEM-PAIRS is unknown ("?") when a value not in
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
3/21/2008 |
|
Status: Unverified
FACT(s) (Environment):
Windows
OpenEdge 10.1B
SYMPTOM(s):
SCREEN-VALUE attribute of of a COMBO-BOX using LIST-ITEM-PAIRS is unknown ("?") when a value not in the list is typed into the fill-in.
Input is entered from the keyboard into the fill-in portion of the COMBO-BOX.
COMBO-BOX widget defined using LIST-ITEM-PAIRS attribute
COMBO-BOX widget defined using DROP-DOWN option
The keyboard input is not in the drop-down list portion of the COMBO-BOX.
On the VALUE-CHANGED event for the COMBO-BOX, the SCREEN-VALUE attribute is unknown ("?").
On the VALUE-CHANGED event for the COMBO-BOX, the INPUT-VALUE attribute is unknown ("?").
CAUSE:
This is expected behavior for a SIMPLE or DROP-DOWN combo box when the value entered into the fill-in is not an item in the list.
FIX:
Capture keystrokes as they are entered into the fill-in, and use the value obtained instead of the SCREEN-VALUE attribute. The following sample code will capture keyboard input in a CHARACTER variable that can be used elswhere in a program:
DEFINE VARIABLE myComboBoxKeyInput AS CHARACTER NO-UNDO.
ON ENTRY OF myComboBox DO:
ASSIGN myComboBoxKeyInput = "".
END.
ON ANY-PRINTABLE OF myComboBox DO:
myComboBoxKeyInput = myComboBoxKeyInput + CHR(LASTKEY).
END.
Code is also necessary to handle field editing keys such as BACKSPACE; for simplicity this code is not shown.