Remove an attachment from attachment control if that is an unacceptable file type

[Nipuni]

Hello,

I am experiencing an issue with PowerApps - Attachment Control.

I have created an app using a SharePoint list and I used a form control. My requirement is to allow only to upload .pdf and .xlsx file types in the attachment control.

I used below functions in "OnAddFile" property of attachment control.

If(
    Not(
        EndsWith(
            Last(Self.Attachments).Name,
            ".pdf"
        )
    ) And Not(
        EndsWith(
            Last(Self.Attachments).Name,
            ".xlsx"
        )
    ),
    Notify(
        "Only .pdf and .xlsx files are allowed",
        NotificationType.Error
    );
    RemoveIf(Self.Attachments, Name = Last(Self.Attachments).Name);
)

In this way, attachment adds to the form control, even if it is not an acceptable file type. But when trying to upload another attachment, previously uploaded incorrect file removes.

I need to stop adding that incorrect attachment to the form control. I used Reset() function as well. But it resets the entire
attachment control. I need to remove only the unacceptable attachment.

Please can someone help me with this?

[WarrenBelz · Accepted solution]

Hi @Nipuni ,

Unfortunately, you cannot do this (I have been down this track before) - you have already stated the only solution which is to reset the control which deletes all unsaved attachments. For some reason the RemoveIf wants to remove the second last attachment - this does not work either

If(
    !EndsWith(
        Last(Self.Attachments).Name,
        "pdf"
    ),
    Remove(
        Self.Attachments,
        Last(Self.Attachments)
    )
)

[Nipuni]

@WarrenBelz Your answer is useful for me. Thank you very much for your reply. 

[divyasingh]

suppose we want only a specific file format to get added in our attachment control and rest to not even get added over there, can we achieve this, can we restrict on add file property of attachment to accept only .pdf or abc.pdf names anyway, w/o any extra buttons just by setting up it on on add file or on remove file property

[WarrenBelz]

@divyasingh ,

OnAddFile

If(
   Lower(   
      Last(
         Split(
            Last(Self.Attachments).Name,
            "."
         )
      ).Value
   ) <> "pdf",
   Notify(
      "Only PDF files allowed",
      NotificationType.Error
  );
  Reset(Self)
)

[divyasingh]

Whta if i want to directly remove file from my attachment control RemoveIf(myFiles,LookUp(myFiles(Attachments_Required.Attachments),Name = "ABC.csv" || Name = "CDE.csv"))

[WarrenBelz]

@divyasingh ,

Not possible with code as far as I know