我想基于Magento中的上选下拉列表更新下一个文本框

Question

这是我的下拉列表：

$fieldset->addField('auto_play','select',
array('label'=>Mage::helper('attigo_slider')->__('Auto Play'),
    'values'=>Mage::getModel('adminhtml/system_config_source_yesno')->toOptionArray(),
    'name'=>'auto_play',
    'value'=> $config['auto_play']));

现在我想根据选定的上限值

添加以下文本框

$fieldset->addField('delay', 'text',
                array('label'=> Mage::helper('attigo_slider')->__('Delay Speed'),
              'after_element_html'=>'<small>Work only if Auto play is set to "Yes"</small>',
              'name'=>'delay','value'=> $config['delay']));

Answer 1

你可以使用如下

   $fldSet4->addField('include_flag', 'select', array(
          'label'     => $hlp->__('Include Only Selected Categories'),
          'name'      => 'include_flag',
          'values'    => $yesno
        )); 

// drop down if yes then show below text box

        $fldSet4->addField('include_only', 'text', array(
          'label'     => $hlp->__('Include Only Categories'),
          'name'      => 'include_only',
          'note'      => $hlp->__('Comma separated list of the categories IDs like 17,4,25'),
        ));


        // Append dependency javascript

        $this->setChild('form_after', $this->getLayout()
        ->createBlock('adminhtml/widget_form_element_dependence')
        ->addFieldMap('include_flag', 'include_flag')
        ->addFieldMap('include_only', 'include_only')
        ->addFieldDependence('include_only', 'include_flag', 1) // 2 = 'Specified'
);

修改

   $this->setChild('form_after', $this->getLayout()
            ->createBlock('adminhtml/widget_form_element_dependence')
            ->addFieldMap('auto_play', 'auto_play')
            ->addFieldMap('delay', 'delay')
            ->addFieldDependence('delay', 'auto_play', 1) // 2 = 'Specified'
    );

根据需要更改->addFieldDependence函数的第3个参数。

尽量仔细理解。

希望这对您有所帮助。