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Require data card when any checkbox in gallery not checked

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Posted on by biancadevera

I created checkboxes within a gallery. I would like to require a dropdown whenever nothing was selected in the gallery checkbox. How can this be done?

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biancadevera on at

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Please help @WarrenBelz @RandyHayes @BCBuizer

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BCBuizer 22,833 Super User 2026 Season 1 on at

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Hi @biancadevera ,

Can you please elaborate a bit on what the desired behaviour of the app is? What happens when a checkbox is selected? What is the dropdown supposed to do if no Checkboxes have been selected?

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v-yujincui-msft Microsoft Employee on at

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Hi @biancadevera ,

If you want to control the visibility of the Drop Down Control based on whether the Checkbox is checked, maybe you could try to select the Drop Down Control and apply the following formula on its Visible property as:
!Checkbox1.Value
Result Screenshot:

In addition, if you want to show Drop Down Control when any checkbox in gallery is unchecked, maybe you could try to select the Drop Down Control and apply the following formula on its Visible property as:
If(CountRows(Filter(Gallery3.AllItems, Checkbox1.Value=true))=0,true,false)
Result Screenshots:

Best Regards,
Charlie Choi

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