Hiding and Disabling Fields

Avoid using FieldChange PeopleCode to hide, unhide, enable, or disable elements on the same page, unless the element is triggered by a separate button.

Hiding or unhiding objects and enabling or disabling objects should, as a general rule, be coded in either page Activate PeopleCode or, for objects that are on another page in the component, in FieldChange PeopleCode.

Perform cross-validation edits to prevent invalid data combinations from being written to the database for fields that previously would have been hidden or unavailable. If unhiding fields that were previously hidden or unavailable results in making the page confusing, consider designing a longer page so that users can easily associate related fields.

You can hide or unhide objects or set them to display-only in page Activate PeopleCode before the page initially appears based on setup data, configuration options, or personalization settings. You can set fields to display-only using PeopleCode by setting the DisplayOnly property for the field to True.

You can hide or unhide fields on another page, or set the fields to display-only, based on the value that a user enters in a field on the current page, as long as that component or field is set up to run in deferred processing mode. In some cases, it may make sense to split transactions across pages to achieve progressive disclosure.