Ttdfjt

I have created a custom module. When we click on the admin grid to edit, it opens edit page. In that I am showing tabs. When I click on that tab I need to show template file. If you see the below screen you can get idea

this is my tab file

 <?php
/**
 /**
 * Exinent_Customerids Module 
 *
 * @category customer
 * @package 
 * @author pawan
 *
 */

namespace VendorModulenameBlockAdminhtmlCustomeridsEditTab;

/**
 * customerid post edit form main tab
 */
use MagentoBackendBlockTemplateContext;
use MagentoFrameworkRegistry;

class Meat extends MagentoBackendBlockTemplate

// const IBAN_TEMPLATE = 'Exinent_Customerids::test.phtml';
 protected $_template = 'test.phtml';
 protected $_coreRegistry = null;

// public function __construct(
// MagentoBackendBlockWidgetContext $context,
// array $data = []
// ) 
// parent::__construct($context, $data);
// 

// protected function _prepareLayout()
// 
// parent::_prepareLayout();
// if (!$this->getTemplate()) 
// $this->setTemplate(static::IBAN_TEMPLATE);
// 
//
// return $this;
// 

my layout file

<block class="VendorModulenameBlockAdminhtmlCustomeridsEditTabMeat" name="customerids_customerids_edit_tab_meat"/>
 <arguments>
 <argument name="config" xsi:type="array">
 <item name="label" xsi:type="string" translate="true">customerids_customerids_edit_tab_meat</item>
 <item name="collapsible" xsi:type="boolean">true</item>
 <item name="opened" xsi:type="boolean">true</item>
 <item name="sortOrder" xsi:type="string">2</item>
 <item name="canShow" xsi:type="boolean">true</item>
 <item name="componentType" xsi:type="string">fieldset</item>
 </argument>
 </arguments>

1. You need to confirm that, you create test.phtml file at this location.
   VendorModulenameviewadminhtmltemplatestest.phtml



2. 
   

   You need to replace _prepareLayout function code like this.

   
   
   

   <?php
   namespace VendorModulenameBlockAdminhtmlCustomeridsEditTab;
   
   use MagentoBackendBlockTemplateContext;
   use MagentoFrameworkRegistry;
   
   class Meat extends MagentoBackendBlockTemplate
   
   
    protected function _prepareLayout()
    
    $customhtml = parent::_prepareLayout();
    $customhtml .= $this->setTemplate('Vendor_Modulename::test.phtml')->toHtml();
    return $customhtml;
    
   
   

   
   

1.In the layout file you can add the code :

<referenceContainer name="left">
 <block class="VendorModulenameBlockAdminhtmlCustomeridsEditTab" name="customerids_customerids_edit_tab">
 <block class="VendorModulenameBlockAdminhtmlCustomeridsEditTabChild" name="customerids_customerids_edit_tab_child"/> 
 <action method="addTab">
 <argument name="name" xsi:type="string">child_section</argument>
 <argument name="block" xsi:type="string">customerids_customerids_edit_tab_child</argument>
 </action> 
 </block>
</referenceContainer>

2.Create the new file on the path :

VendorModulenameBlockAdminhtmlCustomeridsEditTabChild.php

With content :

namespace VendorModulenameBlockAdminhtmlCustomeridsEditTab;

class Child extends MagentoBackendBlockWidgetFormGeneric implements MagentoBackendBlockWidgetTabTabInterface

 /**
 * @var MagentoBackendBlockWidgetFormRendererFieldset
 */
 protected $_rendererFieldset;
 /**
 * @var MagentoStoreModelSystemStore
 */
 protected $_systemStore;
 protected $_customerFactory; 
 protected $_resource; 

 /**
 * @param MagentoBackendBlockTemplateContext $context
 * @param MagentoFrameworkRegistry $registry
 * @param MagentoFrameworkDataFormFactory $formFactory
 * @param MagentoStoreModelSystemStore $systemStore
 * @param array $data
 */
 public function __construct(
 MagentoBackendBlockTemplateContext $context,
 MagentoFrameworkRegistry $registry,
 MagentoFrameworkDataFormFactory $formFactory,
 MagentoStoreModelSystemStore $systemStore,
 MagentoBackendBlockWidgetFormRendererFieldset $rendererFieldset,
 MagentoCustomerModelCustomerFactory $customerFactory, 
 MagentoFrameworkAppResourceConnection $resource, 
 array $data = []
 ) 
 $this->_systemStore = $systemStore;
 $this->_rendererFieldset = $rendererFieldset;
 $this->_customerFactory = $customerFactory; 
 $this->_resource = $resource; 
 parent::__construct($context, $registry, $formFactory, $data);
 

 /**
 * Prepare form
 *
 * @return $this
 */
 protected function _prepareForm()
 
 /* @var $model MagefanBlogModelCategory */
 $model = $this->_coreRegistry->registry('current_model');

 /*
 * Checking if user have permissions to save information
 */
 $isElementDisabled = !$this->_isAllowedAction('Vendor_Modulename::child');

 /** @var MagentoFrameworkDataForm $form */
 $form = $this->_formFactory->create();

 $form->setHtmlIdPrefix('child_');

 $fieldset = $form->addFieldset('base_fieldset', ['legend' => __('Add Your Child')]);

 if ($model->getId()) 
 $fieldset->addField('id', 'hidden', ['name' => 'id']);
 

 $fieldset->addField(
 'html', 
 'text', 
 [
 'name' => 'html',
 'label' => __('Html Content'),
 'title' => __('Html Content'),
 'required' => true,
 'disabled' => $isElementDisabled 
 ]
 )->setRenderer($this->_rendererFieldset->setTemplate('Vendor_Modulename::child.phtml')); 

 if (!$model->getId()) 
 $model->setData('status', $isElementDisabled ? '0' : '1');
 
 $this->_eventManager->dispatch('vendor_modulename_edit_tab_main_prepare_form', ['form' => $form]);

 $form->setValues($model->getData());
 $this->setForm($form);

 return parent::_prepareForm();
 

 /**
 * Prepare label for tab
 *
 * @return MagentoFrameworkPhrase
 */
 public function getTabLabel()
 
 return __('Html Content');
 

 /**
 * Prepare title for tab
 *
 * @return MagentoFrameworkPhrase
 */
 public function getTabTitle()
 
 return __('Html Content');
 

 /**
 * Returns status flag about this tab can be shown or not
 *
 * @return bool
 */
 public function canShowTab()
 
 return true;
 

 /**
 * Returns status flag about this tab hidden or not
 *
 * @return bool
 */
 public function isHidden()
 
 return false;
 

 /**
 * Check permission for passed action
 *
 * @param string $resourceId
 * @return bool
 */
 protected function _isAllowedAction($resourceId)
 
 return $this->_authorization->isAllowed($resourceId);
 

3.Create file :

Vendor/Modulename/view/adminhtml/templates/child.phtml

And put your content here

Hope it helps !