public IActionResult CustomerOrders(int?CustomerID = null, int?SortBy = null)
{
var customers = _customerBL.GetCustomers();
ViewBag.Customers = customers
.Select(i => new SelectListItem
{
Value = i.CustomerId.ToString(),
Text = i.Name
}).ToList();
ViewBag.SortOptions = GetSortOptions();
CustomerOrdersVM customerOrdersVM = _orderBL.GetCustomerOrdersVM(CustomerID, SortBy);
return(View(customerOrdersVM));
}