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How to manage checkboxes individually and with a select/unselect all?

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Posted on by Sesese

Hey guys,

in my app I have a gallery with a checkbox in it, one for each row.

Before opening this thread https://powerusers.microsoft.com/t5/Building-Power-Apps/Select-all-Unselect-all-checkboxes-with-a-click-on-a-button/m-p/1654799#M421705 I was used to manage them easily one by one whit this set up:

Reset: varResetCheckbox

Default: ThisItem.Selezionato

OnSelect: UpdateContext({varResetCheckbox: true});;UpdateContext({varResetCheckbox: false})

OnCheck: Patch(collectionFlotta_Anag; ThisItem; {Selezionato: true})

OnUncheck: Patch(collectionFlotta_Anag; ThisItem; {Selezionato: false})

Now, applying the rules defined in the above link, I can easily manage the select/unselect all but I can't manage one by one cause the check element disappear once is the box is clicked

Can someone help me?

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Building Power Apps

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theapurva 970 Super User 2024 Season 1 on at

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Hello,
Please try putting as below:

For Parent Checkbox(Heading row):
OnCheck: UpdateContext({varResetCheckbox:true})
OnUnCheck: UpdateContext({varResetCheckbox:false})
Default: false
Reset:false

For Items Checkbox:
Reset: false
Default: varResetCheckbox
OnSelect: false
OnCheck: Patch(collectionFlotta_Anag; ThisItem; {Selezionato: true})
OnUncheck: Patch(collectionFlotta_Anag; ThisItem; {Selezionato: false})
Sesese on at

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Which is the difference between Parent & Items checkbox?
theapurva 970 Super User 2024 Season 1 on at

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Whenever Parent checkbox is checked, All the items will be checked,
and when Parent checkbox is Unchecked, All the items will be Unchecked,

So use the setting as:
For Parent Checkbox(Heading row):
OnCheck: UpdateContext({varResetCheckbox:true})
OnUnCheck: UpdateContext({varResetCheckbox:false})
Default: false
Reset:false

For Items Checkbox:
Reset: false
Default: varResetCheckbox
OnSelect: false
OnCheck: Patch(collectionFlotta_Anag; ThisItem; {Selezionato: true})
OnUncheck: Patch(collectionFlotta_Anag; ThisItem; {Selezionato: false})
Sesese on at

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This is my gallery actually:

In the checkbox I've put the rules in the first message.
Then I've changed Default from ThisItem.Selezionato to varChecked and crated one button with UpdateContext({varChecked: true}) and another with UpdateContext({varChecked: false})
WarrenBelz 156,748 Most Valuable Professional on at

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Hi @Sesese ,

You actually cannot have it both ways here entirely as you need the Default to show the current value in Selezionato, however if you put a "master" checkbox outside the gallery (I have called it ckMaster below), you can do a "Select All" which will work and when unchecked will revert to the value in the field. You do not need any resets here - use your existing code except the Default of the checkbox in the gallery can be

ckMaster.Value || ThisItem.Selezionato

You can also reduce your Patch code a bit - OnSelect (you do not need the OnCheck and OnUncheck) of the checkbox in the gallery

Patch( collectionFlotta_Anag; ThisItem; Self.Value )

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Visit my blog Practical Power Apps
WarrenBelz 156,748 Most Valuable Professional on at

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Hi @Sesese ,

Just checking if you got the result you were looking for on this thread. Happy to help further if not.

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

Visit my blog Practical Power Apps