购物车结帐价格加入payfast

Question

public class HomeController : Controller
{
    //
    // GET: /Home/

    public ActionResult Index()
    {
        //var clinicbusiness = new ClinicBusiness       ();

        return View();
    }

     [HttpPost]

    public ActionResult ValidateCommand()
    {
        var pa = new PaymentView();

        if (ModelState.IsValid)

            return View("ValidateCommand");
        else
            return View();
    }

    public ActionResult RedirectFromPaypal()
    {
        return View("RedirectFromPaypal");
    }

    private ActionResult View(Func<ActionResult> RedirectFromPaypal)
    {
        throw new NotImplementedException();
    }

这是我的控制器，我从A CART中取物品时遇到问题 如何将购物车项目添加到控制器n累积价格 使用payfast结帐按钮