public async Task <IActionResult> Index(string sorting_order, int?pageNumber)
{
ViewData["CurrentSort"] = sorting_order;
//if the sort parameter is null or empty then we are initializing the value as descending name
ViewBag.SortByName = string.IsNullOrEmpty(sorting_order) ? "descending Name" : "";
//if the sort value is gender then we are initializing the value as descending gender
ViewBag.SortById = sorting_order == "Id" ? "descending Id" : "Id";
IQueryable <ProductViewModel> ProductList = await _productPageService.GetAllProducts();
switch (sorting_order)
{
case "descending Name":
ProductList = ProductList.OrderByDescending(x => x.Name);
break;
case "descending Id":
ProductList = ProductList.OrderByDescending(x => x.Id);
break;
case "Id":
ProductList = ProductList.OrderBy(x => x.Id);
break;
default:
ProductList = ProductList.OrderBy(x => x.Name);
break;
}
int pageSize = 3;
return(View(await PaginatedList <ProductViewModel> .CreateAsync(ProductList.AsNoTracking(), pageNumber ?? 1, pageSize)));
}