Call block function in controller

[Ankita Biswas]

Hello everyone,

I want to set product attribute value in my controller and want to call block function in my controller.

I am unable to do this as facing 500 internal error in magento 2.3.1

Can anyone help me in this.

Thanks

[arunpraba]

Call block in controller

public function __construct(
 ...... \Vendor\Module\Block\Blockname $blockname, 
.....)
{
 $this->blockname = $blockname; 
}
public function execute() 
{
$value=$this->blockname->blockmethod(); 

Use saveAttribute() method to save custom product attribute sample attribute

$mypro=1001; 
$productRepository=$objectManager->get('\Magento\Catalog\Api\ProductRepositoryInterface'); 
$product =$productRepository->getById($mypro);
$product->setBestPrice(0);
$product->getResource()->saveAttribute($product, 'best_price');