How to make a fieldelements in a form , disabled.

We have multiple field elements within formcontainers in a form.

I want to disable all the field elements within the form to be disabled on click of a button.

I tried.

sap.ui.core().getElementById("FormID").setenabled(false);  This didnt work.

neither sap.ui.core().getElementById("FormContainerID").setenabled(false);

Kindly let me know how can we disable the elements through either form or formContainer.