Validating File Extensions, Toolkit 1.0 and UE4.01

Hello,
I have a form where I am using UE4's file attachment feature and am trying to validate the variable [File Name] for 2 file upload form fields using the server-side validation File Extension. I applied the validation to both fields to restrict files to be jpegs or PDFs, but regardless of what kind of file I upload, everything goes through and I receive the attached files via email. If I apply a Show If behavior to the fields, they always fail and neither the files or emails are sent.

At present the form is working through UE4 and other errors are validating correctly, but since any file can be attached this represents a security risk. Let me know what you need from me to help solve this problem.

Please send a copy of your page so I can see the code.

Here is the page in question

Bind to the file_01 and file_02 dynamic bindings instead of the file_01 simple file name and file_02 simple file name bindings

I tried binding the validation to session variables event_file_01 & event_file_02 and it still allows illegal file extensions to be attached. Am I using the wrong binding? It fails using this or using any of the form's own field bindings.

yes, you are using the wrong binding,


use the file_01 and file_02 dynamic bindings in the form collection.