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For UI Component

app/code/VendoreName/ModuleName/view/adminhtml/ui_component

import_storelocation_form.xml

<?xml version="1.0" encoding="UTF-8"?> <form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd"> <argument name="data" xsi:type="array"> <item name="js_config" xsi:type="array"> <item name="provider" xsi:type="string">import_storelocation_form.import_storelocation_form_data_source</item> <item name="deps" xsi:type="string">import_storelocation_form.import_storelocation_form_data_source</item> </item> <item name="label" xsi:type="string" translate="true">General Information</item> <item name="config" xsi:type="array"> <item name="dataScope" xsi:type="string">data</item> <item name="namespace" xsi:type="string">import_storelocation_form</item> </item> <item name="spinner" xsi:type="string">general_information</item> <item name="buttons" xsi:type="array"> <item name="back" xsi:type="string">VendoreName\ModuleName\Block\Adminhtml\Storelocator\Edit\Button\Back</item> <item name="reset" xsi:type="string">VendoreName\ModuleName\Block\Adminhtml\Storelocator\Edit\Button\Reset</item> <item name="save" xsi:type="string">VendoreName\ModuleName\Block\Adminhtml\Storelocator\Edit\Button\SaveImportData</item> </item> <item name="template" xsi:type="string">templates/form/collapsible</item> </argument> <dataSource name="import_storelocation_form_data_source"> <argument name="dataProvider" xsi:type="configurableObject"> <argument name="class" xsi:type="string">VendoreName\ModuleName\Model\DataProvider</argument> <argument name="name" xsi:type="string">import_storelocation_form_data_source</argument> <argument name="primaryFieldName" xsi:type="string">entity_id</argument> <argument name="requestFieldName" xsi:type="string">entity_id</argument> <argument name="data" xsi:type="array"> <item name="config" xsi:type="array"> <item name="submit_url" xsi:type="url" path="*/*/saveimportdata"/> </item> </argument> </argument> <argument name="data" xsi:type="array"> <item name="js_config" xsi:type="array"> <item name="component" xsi:type="string">Magento_Ui/js/form/provider</item> </item> </argument> </dataSource> <fieldset name="general_information"> <argument name="data" xsi:type="array"> <item name="config" xsi:type="array"> <item name="collapsible" xsi:type="boolean">false</item> <item name="label" xsi:type="string" translate="true"></item> <item name="sortOrder" xsi:type="number">20</item> </item> </argument> <field name="importfile"> <argument name="data" xsi:type="array"> <item name="config" xsi:type="array"> <item name="dataType" xsi:type="string">string</item> <item name="source" xsi:type="string">importfile</item> <item name="label" xsi:type="string" translate="true">Upload File</item> <item name="visible" xsi:type="boolean">true</item> <item name="allowedExtensions" xsi:type="string">csv xls</item> <item name="maxFileSize" xsi:type="number">2097152</item> <item name="formElement" xsi:type="string">fileUploader</item> <item name="previewTmpl" xsi:type="string">VendoreName_ModuleName/file-preview</item> <item name="elementTmpl" xsi:type="string">ui/form/element/uploader/uploader</item> <item name="dataScope" xsi:type="string">importfile</item> <item name="notice" xsi:type="string" translate="true">Allow File Types:- .csv and .xls</item> <item name="validation" xsi:type="array"> <item name="required-entry" xsi:type="boolean">true</item> </item> <item name="uploaderConfig" xsi:type="array"> <item name="url" xsi:type="url" path="storelocator/storelocator/Importupload" > <param name="target_element_id">importfile</param> <param name="type">image</param> </item> </item> </item> </argument> </field> </fieldset> </form> 

Click Here to download the source code for the UI component

<?php namespace vendor\module\Block\Adminhtml\Importpincode\Edit\Tab; class Importpincode extends \Magento\Backend\Block\Widget\Form\Generic { protected $_assetRepo; public function __construct( \Magento\Backend\Block\Template\Context $context, \Magento\Framework\Registry $registry, \Magento\Framework\Data\FormFactory $formFactory, \Magento\Framework\View\Asset\Repository $assetRepo, array $data = [] ) { $this->_assetRepo = $assetRepo; parent::__construct($context, $registry, $formFactory, $data); } /** * Prepare form * * @return $this */ protected function _prepareForm() { $path = $this->_assetRepo->getUrl("vendor_module::importsample/sample.csv"); $form = $this->_formFactory->create(); $objectManager = \Magento\Framework\App\ObjectManager::getInstance(); $storemanager = $objectManager->create('Magento\Store\Model\StoreManagerInterface'); $fieldset = $form->addFieldset( 'base_fieldset', [ 'legend' => __('Import Pincodes'), 'class' => 'fieldset-wide' ] ); $importdata_script = $fieldset->addField( 'file', 'file', [ 'name' => 'file', 'label' => __('Upload File'), 'title' => __('Upload File'), 'required' => true, ] ); $importdata_script->setAfterElementHtml(" <span id='sample-file-span' ><a id='sample-file-link' href='".$path."' >Download Sample File</a></span> "); $this->setForm($form); return parent::_prepareForm(); } /** * Prepare label for tab * * @return string */ public function getTabLabel() { return __('Import Pincodes'); } /** * Prepare title for tab * * @return string */ public function getTabTitle() { return $this->getTabLabel(); } /** * Can show tab in tabs * * @return boolean */ public function canShowTab() { return true; } /** * Tab is hidden * * @return boolean */ public function isHidden() { return false; } } 

<?php namespace vendor\module\Block\Adminhtml\Importpincode\Edit\Tab; class Importpincode extends \Magento\Backend\Block\Widget\Form\Generic implements \Magento\Backend\Block\Widget\Tab\TabInterface { protected $_assetRepo; public function __construct( \Magento\Backend\Block\Template\Context $context, \Magento\Framework\Registry $registry, \Magento\Framework\Data\FormFactory $formFactory, \Magento\Framework\View\Asset\Repository $assetRepo, array $data = [] ) { $this->_assetRepo = $assetRepo; parent::__construct($context, $registry, $formFactory, $data); } /** * Prepare form * * @return $this */ protected function _prepareForm() { $path = $this->_assetRepo->getUrl("vendor_module::importsample/sample.csv"); $form = $this->_formFactory->create(); $objectManager = \Magento\Framework\App\ObjectManager::getInstance(); $storemanager = $objectManager->create('Magento\Store\Model\StoreManagerInterface'); $fieldset = $form->addFieldset( 'base_fieldset', [ 'legend' => __('Import Pincodes'), 'class' => 'fieldset-wide' ] ); $importdata_script = $fieldset->addField( 'file', 'file', [ 'name' => 'file', 'label' => __('Upload File'), 'title' => __('Upload File'), 'required' => true, ] ); $importdata_script->setAfterElementHtml(" <span id='sample-file-span' ><a id='sample-file-link' href='".$path."' >Download Sample File</a></span> "); $this->setForm($form); return parent::_prepareForm(); } /** * Prepare label for tab * * @return string */ public function getTabLabel() { return __('Import Pincodes'); } /** * Prepare title for tab * * @return string */ public function getTabTitle() { return $this->getTabLabel(); } /** * Can show tab in tabs * * @return boolean */ public function canShowTab() { return true; } /** * Tab is hidden * * @return boolean */ public function isHidden() { return false; } } 

above code running good