public IActionResult Index(string sortOrder) { var bok = _bookRepo.GetAllBooks(); if (sortOrder == "titill") { bok = _bookRepo.GetAllBooksOrderedByName(); } else if (sortOrder == "titill_desc") { bok = _bookRepo.GetAllBooksOrderedByNameDesc(); } else if (sortOrder == "lowToHigh") { bok = _bookRepo.GetAllBooksOrderedByPrice(); } else if (sortOrder == "highToLow") { bok = _bookRepo.GetAllBooksOrderedByPriceDesc(); } return(View(bok)); }