Form validation on file upload button

[korchev]

@Chad

For my use case I simply need to know if they selected a file, no different that if they filled in a text box or selected a value from a drop down etc.

I am not sure if this is sufficient. RadzenUpload will not upload the file when the user submits the form.

@Chad

If the upload fails, is that not the same as anything else failing within FormSubmit()?

No as the upload is separate from the form submission.

Your current implementation can probably use RadzenCustomValidator and use upload.HasValue for the condition. Then the FormSubmit event won't fire if the validator fails.