public ActionResult GenerateInvoice(CustomerServiceModel model)
        {
            var invoice = new InvoiceModel();

            var customer = CustomerManager.GetById(model.SelectedCustomer);
            var seller = SellerManager.GetById(1);
            var services = ServiceManager.GetServiceByIds(model.SelectedServices);

            invoice.Name = customer.Name;
            invoice.Surname = customer.Surname;
            invoice.City = customer.City;
            invoice.CompanyName = customer.CompanyName;
            invoice.Code = customer.Code;
            invoice.NIP = customer.NIP;
            invoice.CompanyName = customer.CompanyName;
            invoice.Street = customer.Street;
            invoice.PhoneNumber = customer.PhoneNumber;
            invoice.SellerName = seller.Name;
            invoice.SellerSurname = seller.Surname;
            invoice.SellerCity = seller.City;
            invoice.SellerCompanyName = customer.CompanyName;
            invoice.SellerCode = seller.Code;
            invoice.SellerNIP = seller.NIP;
            invoice.SellerStreet = seller.Street;
            invoice.SellerPhoneNumber = seller.PhoneNumber;
            invoice.SellerCompanyName = seller.CompanyName;
            invoice.AllServices = services.ToList();
            invoice.CustomerId = customer.Id;

            return View("Invoice", invoice);
        }
 public ActionResult Index()
 {
     var customerservice = new CustomerServiceModel();
     customerservice.Customers = new SelectList(CustomerManager.Customers, "Id", "Name");
     customerservice.Service = new SelectList(ServiceManager.Service, "Id", "ServiceName");
     return View("Index", customerservice);
 }