Allow only .xlsx as upload

[administrator]

In AttachmentControl --> OnAddFile add the following line:

Code: Select all

If(Not(EndsWith(First(Self.Attachments).Name, ".xlsx")) ,Notify("Only .xlsx files are allowed", NotificationType.Error); Reset(Self))

This checks if the extension is .xlsx otherwise it shows an error message and removes the attachment.
Change the extension to any you would like to use.