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This.Value = This.Value
Message
De
23/10/1998 09:38:32
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
 
 
À
23/10/1998 09:16:07
Information générale
Forum:
Visual FoxPro
Catégorie:
Gestionnaire d'écran & Écrans
Divers
Thread ID:
00149804
Message ID:
00149810
Vues:
45
>I found a interesting bug in VFP, which can be solved by the apparently redundant sentence THIS.VALUE=THIS.VALUE. To show the bug:
>
>CREATE a table with a numeric field and a text field.
>
>APPEND a record to it
>
>Create a blank form, and include the table in its environment.
>
>Add a spinner to the form; set its ControlSource to the numeric field, and in its INTERACTIVECHANGE code write THISFORM.REFRESH().
>
>Add a textbox to the form; set its ControlSource to the text field, and in its REFRESH code write THIS.VALUE = STR(THISFORM.SPINNER.VALUE).
>
>Run it, and try to change the spinner by clicking on its arrow buttons!! What I get is: the spinner changes for an instant, and goes back to its original value. (This doesn´t happen if the objects have no ControlSource.)
>
>The solution? Add THIS.VALUE=THIS.VALUE at the beginning of the SPINNER.INTERACTIVECHANGE code.
>
>Weird!!
Hi Federico,
FYI this behaviour is not dedicated to spinners. Textboxes, combos etc behave the same way and in grids beforerowcolumnchange event data validation checks need a this.value = this.value for currentcontrol. Another weird situation :
* combo.lostfocus
this.value = this.displayvalue
this.displayvalue = this.value
might be lifesaver in editable lookup combos.
Cetin
Çetin Basöz

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