Power Platform Community Forum Thread Details

Hi all,

I’m trying to prevent users from submitting duplicate files in the attachment section.

I added the following logic in the OnAddFile property. It successfully detects duplicate files, but it does not remove the duplicate from the attachment control.

I would prefer not to use Reset(Self), since that would remove all files. Instead, I’d like to:

- remove only the duplicate file, or

- ensure that if the same file is uploaded multiple times, it only appears once in the attachments list.

With(

{ newName: Lower(Last(Self.Attachments).Name) },

    If(

        CountIf(Self.Attachments As f, Lower(f.Name) = newName) > 1,

        Notify("This file has already been uploaded.")

    )

)

Categories:

General topics

Building Power Apps

Hi @CU20031912-2,

This should work for you - put this OnAddFile of the Attachment Control

If(
   CountIf(
      colAttach, 
      Lower(Name) = Lower(Last(Self.Attachments).Name)
   ) > 0,
   Notify(
      "This file has already been uploaded",
      NotificationType.Error,
      5000
   );
   Reset(Self),
   Collect(
      colAttach, 
      Last(Self.Attachments)
   )
)

and set the Items of the Attachment control to

colAttach

The problem is that you cannot programatically delete an item from an attachment control, so you nned to use a collection for the Items and manage that. Resetting the control in this instance will "delete" the new item and revert it back to the existing collection without it added.

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