Form Attachment mandatory depending on field

[T1ago]

Hi,

I need to make the file attachment mandatory depending on a dropdown option.

I have made this for other fields by using the validators (similar to this https://powerusers.microsoft.com/t5/Power-Apps-Portals/Make-field-required-in-Portal-based-on-value-...)

However I can't quite do it with the file attachment.

Is it possible to make a verification Portal side only?

[T1ago · Accepted solution]

Managed to figure it out, using the validators. For anyone that might need it:

var fileRequired = function(fieldName) {
        try {
            if ($("#" + fieldName) != undefined) {
                $("#" + fieldName).prop('required', true);
                $("#" + fieldName).closest(".control").prev().addClass("required");

                // Create new validator
                var Requiredvalidator = document.createElement('span');
                Requiredvalidator.style.display = "none";
                Requiredvalidator.id = fieldName + "Validator";
                Requiredvalidator.controltovalidate = fieldName;
                
                Requiredvalidator.errormessage = "<a href='#" + fieldName + "'> File is mandatory";

                
                Requiredvalidator.initialvalue = "";
                Requiredvalidator.evaluationfunction = function() {
                    var inputFile = $('#AttachFile').val();
                    if (inputFile == "") {
                        return false;
                    } else {
                        return true;
                    }
                };

                // Add the new validator to the page validators array:
                Page_Validators.push(Requiredvalidator);
            }
        } catch (error) {
            errorHandler(error);
        }
    }

    var fileNotRequired = function(fieldName) {
        try {
            if ($("#" + fieldName) != undefined) {
                $("#" + fieldName).closest(".control").prev().removeClass("required");
                $("#" + fieldName).prop('required', false);

                for (i = 0; i < Page_Validators.length; i++) {
                    if (Page_Validators[i].id == fieldName + "Validator") {
                        Page_Validators.splice(i);
                    }
                }
            }
        } catch (error) {
            errorHandler(error);
        }
    }

And then use when needed (fieldName is <input> ID of the file upload):

fileNotRequired("AttachFile");

fileRequired("AttachFile");