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Preview of PDF / Image Document in Power Apps Gallery

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Posted on by Phineas

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I am attempting to create a work-around that displays PDF and image files in a Gallery of an SP List custom form app.

I've got it to this -
The Gallery (on the right) has 'TTG Medical History Template' in its Items property.
The Gallery Image control has the following in it's Items property.
"https://------------.sharepoint.com/_layouts/15/getpreview.ashx?path=" & First(LookUp([@'History Template'], FullName = DataCardValue4.Text).Attachments).AbsoluteUri

I can get the document to display in the Image control, however it shows the same image as many times as there are items on the SP List (three in this case), rather than the single page that it is (or the multiple different pages of the PDF or Image).

Why does the Image control show the same image multiple times even if the original document may only be a single page document, or shows the same image four times when the document has eight different pages?

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Building Power Apps

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subsguts 1,259 Moderator on at

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I believe the reason to the question of why does it show three times is because you Items property of the gallery is tied to a List that has 3 items. If you put anything in that gallery it will repeat mutliple times. For example, if you add an icon to that gallery, I believe it will also show 3 times.

So to fix this problem, you'll need to adjust your Items property. I know this is not a "cut&paste" solution, but hopeful this will get you going in the right direction?

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Phineas 5,331 Moderator on at

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When I comment out the content of the Gallery Items property, I can see the content of the Image control (which to be clear is a PDF file from the Attachment column of the SP List), in 'Edit' mode...

...But not in 'Play'.

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