Power Platform Community Forum Thread Details

Hi!

I followed with video to implement multiple attachments control for my Dataverse table in Canvas App:

https://www.youtube.com/watch?v=RGJrUkgh_NU

So, I have a table Signal and 1:N table Signal Attachment. Signal Attachment table has a lookup to Signal and field of type File.

In Canvas app on New/Edit screen I have a Attachments control (outside of the Form) to upload attachments, and a Gallery to view file names and remove attachments:

I have code AttachmentControl.OnAddFile (to add files to colSignalAttachments collection, marked as IsNew), Gallery.RemoveIcon.OnSelect (to mark item in colSignalAttachments as IsDeleted) and Gallery.RestoreIcon.OnSelect (to remove IsDeleted mark).

In Canvas app I'm able to upload attachments and save them. If I open my Signal Attachment table in MDA I can see attachments and view it without any issue.
 
 
 
SaveButton.OnSelect:
ForAll(
    Filter(colSignalAttachments, IsDeleted) As ThisAttachment,
    RemoveIf('Signal Attachment', 'Signal Attachment' = ThisAttachment.ID);
);
ForAll(
    Filter(colSignalAttachments, IsNew) As ThisAttachment,
    Patch(
        'Signal Attachment',
        Defaults('Signal Attachment'),
        {
            Signal: ctxViewSignal,
            Attachment: {
                FileName: ThisAttachment.DisplayName,
                Value: ThisAttachment.Value
            }
        }
    )
);
 
However, I cannot download attachments on my View screen. 
 
AttachmentControl.Items:
ForAll(
    Filter(
        'Signal Attachment',
        Signal.Signal = ctxViewSignal.Signal
    ).Attachment,
    {
        DisplayName: ThisRecord.Attachment.FileName,
        Value: ThisRecord.Attachment.Value
    }
)
 
It shows my files names correctly, but on download I receive "BlobNotFound":
 
 
The only noticible difference between my app and the video guide is that I cannot map DisplayName and Value field on the Attachment Control Properties pane (there are no such properties).