Increment within a Gallery

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Posted on by dallenap

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I'm not seeing how this is possible. I've been asked to add an input to a gallery that allows a user to add/subtract incremental values for each record.

So, each record in the gallery should have a control such as:

Where clicking the up arrow would increase the value by 0.01 and the down error would decrease by 0.01.

Using a global variable won't work as each record in the gallery will have such a control. Updating one record will update all when using a global variable.

I'd rather not patch back to the data source with each button click.

Appreciate any advice.

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Building Power Apps

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Pstork1 68,725 Most Valuable Professional on at

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Have you tried building a custom component with the two arrows and the textbox. A global variable inside the component wouldn't be visible to the app. That way you could isolate everything except the default value (input) and the final value (output). I haven't tried adding a component to a gallery, but that would be what I would try.

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Apurva 91 on at

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Hello, I have created similar functionality for a different use case. You can find it here https://youtu.be/LThBCfJ5jxM?si=6cnbUGIqkNh0U1Gw

Try this and please let me know if it helps!

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Gabriel G. 831 Super User 2025 Season 2 on at

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Your global variable can’t deal with many items in a gallery using the same variables. As an alternative, you can add a column to your gallery collection to record your custom value:

AddColumns(<galleryCollection>, newColumnToIncrement, 0).

Then, you will create a textbox, which will display the value ‘ThisItem.newColumnToIncrement’. You will also create 2 buttons to increment or decrement that value using your brand new column ‘ThisItem.newColumnToIncrement’:

incrementButton.OnSelect(Patch(<galleryCollection>, ThisItem, {newColumnToIncrement: ThisItem.newColumnToImcrement + 1}))

You can do it the same way for the ‘-‘ button but with - 1 instead.

I hope it resolves your need!

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jrletner 720 Super User 2025 Season 2 on at

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If you loaded your gallery into a collection, you'd have the scope necessary to increment each one in a gallery.

The arrows patch the new value by .01 either up or down.

Up arrow: Patch(colUsers,ThisItem,{Rank: ThisItem.Rank + .01})

Down arrow: Patch(colUsers,ThisItem,{Rank: ThisItem.Rank - .01})

Then you could patch your datasource from the collection somewhere in your code.

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