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Change Gallery Image when Selected from SharePoint List

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Posted on by kmaack

I have a gallery that is connected to a SharePoint list that contains two image columns. The gallery item property is filtered to just the SharePoint records (those listed as an Competency) needed in the gallery. The gallery currently displays the images in the SharePoint list column called "Image Original."

When an item is selected, I want the image in the gallery to change to the SharePoint list column called "Image Selected." If a different item is selected in the gallery, I want that previous image to change back to the "Image Original" and the new item selected to change to the "Image Selected."

I am having difficulty doing this. I tried one formula, but kept getting an error about comparing different data types (text to image), even though everything is an image. Any ideas?

SharePoint list looks like below.

Title	Description	Image Original	Image Selected	Selection
Type 1	Description of the type	Type 1 Image	Type 1 Image	Competency
Type 2	Description of the type	Type 2 Image	Type 2 Image	Competency
Type 3	Description of the type	Type 3 Image	Type 3 Image	Competency

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BCBuizer 22,833 Super User 2026 Season 1 on at

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HI @kmaack ,

Set the Image property of the Image control to:

If( ThisItem.IsSelected, ThisItem.'Image Selected', ThisItem.'Image Original' )

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kmaack 39 on at

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Thanks for the reply! I've tried that and that is where I'm getting the error (below).

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BCBuizer 22,833 Super User 2026 Season 1 on at

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Hi @kmaack ,

In my tests this is running smoothly. Are you sure you have two image type columns? Power Apps Studio seems to say otherwise.

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kmaack 39 on at

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Both columns in my SharePoint list are showing as Type Image. I have .png photos uploaded into the columns.

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BCBuizer 22,833 Super User 2026 Season 1 on at

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Hi @kmaack ,

That's peculiar... Can you try just the single columns to see what happens?

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kmaack 39 on at

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Hi @BCBuizer ,

I'm not sure I'm following when you mention to try a single column. My Image Original and Image Selected in its own row? If so, how would I tie the two rows together? Type 1 would then have two rows.

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BCBuizer 22,833 Super User 2026 Season 1 on at

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Hi @kmaack ,

I meant to first enter only ThisItem.'Image Original' and note the result and then enter ThisItem.'Image Selected' only, again noting the result.

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kmaack 39 on at

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Hi @BCBuizer ,

Gotcha! When using ThisItem.'Image Original' and ThisItem.'Image Selected' in the item property of the image, they both work as intended. The correct image displays.

I even tried creating a new canvas app from fresh and I still get the same error message.

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BCBuizer 22,833 Super User 2026 Season 1 on at

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Hi @kmaack ,

Then for troubleshooting purposes, let's try this which should always show the original image:

If( false, ThisItem.'Image Selected', ThisItem.'Image Original' )

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kmaack 39 on at

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Hi @BCBuizer ,

I'm getting the same error message with this one as well.

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