public async System.Threading.Tasks.Task <ActionResult> ChangeState(int id)
{
Order order = new Order();
using (App_Context db = new App_Context())
{
order = db.Orders.SingleOrDefault(s => s.OrderId == id);
if (order == null || order.OrderState != "Pending" && order.OrderState != "Read" && order.OrderState != "Completed")
{
return(HttpNotFound());
}
if (order.OrderState == "Completed")
{
order.OrderState = "Read";
}
else
{
order.OrderState = "Completed";
EmailHandler e = new EmailHandler();
await e.CompletedEmail(order);
}
db.SaveChanges();
}
return(RedirectToAction("Order", "Order"));
}