Select ONE Checkbox from Gallery Row ONLY

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Posted on by smithmrk

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I have a gallery with data begin pulled from Dataverse...right now 4 items.

Each Record is a row in the Gallery.

If the user clicks Row 1 Check Box Good.

If the user then decides to click Row 2 Check Box REMOVE Row 1 Checked Box.

If the user then decides to click Row 4 Check Box REMOVE Row 2 Checked Box.

I only want ONE Row to be checked at a time and remove the check marks from the rest of the rows.

How can I keep track of what row is checked off so I can remove the check marks from all the other rows??

Thanks,
Mark

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Power Apps Pro Dev & ISV

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MS.Ragavendar 7,492 Super User 2026 Season 1 on at

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@smithmrk,

I replicated your scenario.

Properties

Default - ThisItem.ID = varSelectedID

//Replace ID with the unique identifier column of your Dataverse record

OnCheck - Set(varSelectedID, ThisItem.ID)

OnUncheck - Set(varSelectedID, Blank())

🏷️ Please tag me @MS.Ragavendar if you still have any queries related to the solution or issue persists.

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smithmrk 288 on at

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Perfect!!!

Thanks so much.

Mark

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smithmrk 288 on at

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I noticed you used the "Classic Checkbox" control.

I happened to use the new "Modern Checkbox" control...and noticed that on load of the gallery items it does NOT default to the item checked off.

Couple of things I noticed even with the Classic Control is when you first load the data the "varSelectedID" is blank.

That's fine, I added an IF statement that if the varSelectedID is Blank to use ThisItem.ID which seemed to work fine for the Classic Control, but NOT the Modern Control.

Didn't know if you wanted to play around with both on the gallery and see if you are seeing the same results I am as well.

I also added a toggle to see how that would act as well and both the Classic and Toggle work as expected, but the Modern Control does not work "On Loading of data to Gallery" / Checked.

Example...

Let me know if you have any questions, about any of this.

Mark

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MS.Ragavendar 7,492 Super User 2026 Season 1 on at

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@smithmrk,

Let me try with Modern Controls and will circle back on this.

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