// GET: Customers
public async Task <IActionResult> Index(string searchString, SortState sortOrder = SortState.LastNameAsc)
{
var customers = from c in await _customers.GetAllAsync()
select c;
ViewData["CurrentFilter"] = searchString;
if (!String.IsNullOrEmpty(searchString))
{
customers = customers.Where(s => s.LastName.Contains(searchString) ||
s.FirstName.Contains(searchString));
}
ViewData["LastNameSort"] =
sortOrder == SortState.LastNameAsc ? SortState.LastNameDesc : SortState.LastNameAsc;
ViewData["AddressSort"] = sortOrder == SortState.AddressAsc ? SortState.AddressDesc : SortState.AddressAsc;
customers = sortOrder switch
{
SortState.LastNameDesc => customers.OrderByDescending(c => c.LastName),
SortState.AddressAsc => customers.OrderBy(c => c.Address),
SortState.AddressDesc => customers.OrderByDescending(c => c.Address),
_ => customers.OrderBy(c => c.LastName),
};
return(View(customers));
}