从 ModelAdmin 中删除导出按钮

class MyAdmin extends ModelAdmin {

    ...

    function getEditForm($id = null, $fields = null) {
        $form = parent::getEditForm($id, $fields);

        if ($this->modelClass == 'MyDataObjectName') {
            $form->Fields()
                ->fieldByName($this->sanitiseClassName($this->modelClass))
                ->getConfig()
                ->removeComponentsByType('GridFieldExportButton');
        }
        return $form;
    }
}