database - Delphi 5 DB Aware ComboBox ItemIndex Not Updating -


so have dbaware combobox , problem this.

if do:

combobox.itemindex := 0;

then though visually shows item in combobox being selected, following still returns true.

query.fieldbyname('field').isnull

basically i'm trying make if field associated combobox null record, want combobox default first index. however, when itemindex isn't making edit record.

any ideas? please help.

instead of setting default value itemindex set in dataset like

query.edit; query.fieldbyname('field').value := 'default value'; query.post;

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