I find solution:
First I use
return RedirectToAction("Update", "Product", new { name = productModel.titleENG });
instead of
return View("UpdateProduct", new { name = productModel.titleENG });
then in JavaScript
I use this:
fetch(form.action, {
method: 'POST',
body: formData
})
.then(response => {
if (response.ok) {
location.reload({ forceReload: true });
} else {
console.error('Form submission failed.');
}
})
.catch(error => console.error(error));
so the page is refresh with new data.