on load client script

[Maidhili_G]

Set all the fields ReadOnly based on selection of particular choice in a field (state = cancelled).

on load

[folusho]

@Maidhili_G 

You can use an onChange client script or UI Policy. Put this in the script section:

var fields = g_form.getEditableFields();
for (var x = 0; x < fields.length; x++) {
    g_form.setReadOnly(fields[x], true);
}

[Sandeep Rajput]

@Maidhili_G Please try the following script.

function onLoad() {
    var stateValue = g_form.getValue('state');

    // Ensure this matches the actual value of the "Cancelled" choice in your state field
    if (stateValue === 'cancelled') {
        var fields = g_form.getEditableFields();

        for (var i = 0; i < fields.length; i++) {
            g_form.setReadOnly(fields[i], true);
        }

        // Optional: keep the 'state' field editable to allow reverting
        // g_form.setReadOnly('state', false);
    }
}