IEnumerable <Car> SortCars(IEnumerable <Car> cars, CarsSortState sortOrder)
{
ViewData["StateNumber"] = sortOrder == CarsSortState.StateNumberAsc ?
CarsSortState.StateNumberDesc : CarsSortState.StateNumberAsc;
ViewData["Mark"] = sortOrder == CarsSortState.MarkAsc ?
CarsSortState.MarkDesc : CarsSortState.MarkAsc;
ViewData["ReleaseYear"] = sortOrder == CarsSortState.ReleaseYearAsc ?
CarsSortState.ReleaseYearDesc : CarsSortState.ReleaseYearAsc;
switch (sortOrder)
{
case CarsSortState.StateNumberAsc:
return(cars.OrderBy(c => c.StateNumber));
case CarsSortState.StateNumberDesc:
return(cars.OrderByDescending(c => c.StateNumber));
case CarsSortState.MarkAsc:
return(cars.OrderBy(c => c.Mark));
case CarsSortState.MarkDesc:
return(cars.OrderByDescending(c => c.Mark));
case CarsSortState.ReleaseYearAsc:
return(cars.OrderBy(c => c.ReleaseYear));
case CarsSortState.ReleaseYearDesc:
return(cars.OrderByDescending(c => c.ReleaseYear));
}
return(null);
}
public IActionResult Index(CarFilter filter, int page = 1, CarsSortState sortOrder = CarsSortState.StateNumberAsc)
{
if (!HttpContext.Session.TryGet(out IEnumerable <Car> cars, "Cars"))
{
cars = _context.Cars.AsQueryable();
HttpContext.Session.Set(cars, "Cars");
}
ViewData["Marks"] = cars
.Select(c => new SelectListItem
{
Value = c.Mark,
Text = c.Mark,
Selected = c.Mark == ((string)HttpContext.Items["Mark"] ?? "")
})
.Distinct(new SelectListItemEqualityComparer())
.ToList();
cars = SortCars(cars, sortOrder);
cars = cars
.Where(c => c.StateNumber.StartsWith(filter.StateNumber ?? ""))
.Where(c => c.Mark.StartsWith(filter.Mark ?? ""))
.Where(c => filter.ReleaseYear != 0 ? c.ReleaseYear == filter.ReleaseYear : true);
var count = cars.Count();
cars = cars.Skip((page - 1) * pageSize).Take(pageSize);
ViewData["PageViewModel"] = new PageViewModel(count, page, pageSize);
return(View(cars));
}
public IActionResult Index(CarsSortState sortOrder = CarsSortState.StateNumberAsc)
{
if (!HttpContext.Session.TryGet(out IEnumerable <Car> cars))
{
cars = _context.Cars.AsQueryable();
HttpContext.Session.Set(cars);
}
ViewData["Marks"] = cars
.Select(c => new SelectListItem
{
Value = c.Mark,
Text = c.Mark,
Selected = c.Mark == ((string)HttpContext.Items["Mark"] ?? "")
})
.Distinct(new SelectListItemEqualityComparer())
.ToList();
cars = SortCars(cars, sortOrder);
return(View(cars));
}