public IActionResult ShoppingCartAction(IFormCollection form)
{
var key = form.Keys.FirstOrDefault(k => k.Contains("-"));
var dashPos = key.IndexOf("-");
var action = key.Substring(0, dashPos);
var id = int.Parse(key.Substring(dashPos + 1));
switch (action)
{
case "add": _cartService.AddItemForCurrentSession(HttpContext.Session, id); break;
case "remove": _cartService.DeleteItemForCurrentSession(HttpContext.Session, id); break;
case "increaseQuantity": _cartService.IncreaseCartItemQuantity(id); break;
case "decreaseQuantity": _cartService.DecreaseCartItemQuantity(id); break;
}
return(RedirectToAction("Index"));
}