public IActionResult Index(string search, int pageNumber)
{
List <Newsletter> newsletters = new List <Newsletter>();
if (!String.IsNullOrEmpty(search))
{
newsletters = _newsletterRepository.Search(search).ToList();
pageNumber = 1;
}
else
{
newsletters = _newsletterRepository.GetAll().ToList();
}
int pageSize = 10;
pageNumber = (pageNumber > 0) ? pageNumber : 1;
return(View(PaginatorExtension <Newsletter> .CreateAsync(newsletters, pageNumber, pageSize)));
}