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Advocate I
Advocate I

Attachments control: Get file properties/Restrict file type

Has anyone here been able to use the Attachments control and get a file's properties (ie. file name, file type)? Is there a way to restrict the file types a user can upload using the Attachments control in PowerApps?

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Microsoft
Microsoft

Hello @ghrimm,

Currently there's no way to prevent of attaching certain files by type. You can however check the file extensions of "attached" files, before those files are submitted to SharePoint. You could allow the user to attach any files but disable the "Submit" button if the user attached restricted files. 

Here is how to check the file extension of the first attached file: 

Last(Split(First(Attachments_Control.Attachments).Name, ".")).Result

You can use any enumerations (ForAll for example) to validate all the files this way.

Hope this helps.

View solution in original post

7 REPLIES 7
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Microsoft
Microsoft

Hello @ghrimm,

Currently there's no way to prevent of attaching certain files by type. You can however check the file extensions of "attached" files, before those files are submitted to SharePoint. You could allow the user to attach any files but disable the "Submit" button if the user attached restricted files. 

Here is how to check the file extension of the first attached file: 

Last(Split(First(Attachments_Control.Attachments).Name, ".")).Result

You can use any enumerations (ForAll for example) to validate all the files this way.

Hope this helps.

View solution in original post

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Thanks for the simple workaround. That returns exactly what I need for hiding/showing controls.

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Would you be able to show an example with screenshots from the rule?

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In my OnAddFile property, I have the following:

 

UpdateContext({IsADocx : Last(Split(First(dcv_Attachments.Attachments).Name, ".")).Result = "docx"})

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This works great for a single attached file, but doesn't work on multiple attachments.  Only works on first attachment.  Is there a way to check all attachments? 

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You can check multiple attachments as you upload them one by one

Using the previous formula (but checking the last attachment, not the first) in the "OnAddFile" action field of the attachments card:

If(Last(Split(Last(DataCardValue15.Attachments).Name, ".")).Result = "xlsx",Set(VarContainsXLSX,true))

Will for example check if there are any excel documents uploaded and set a variable.

This won't detect if someone uploads an xlsx and then deletes it.

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Thank you! This worked for me. I am using this to shorten the filename when passed to Flow. When users use the app on their phones and take pics of receipts, the filename is really large and cumbersome. So I am using this to make the file upload to the doc library more palatable.

Thank you so much!!

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