CODEWITHSUNDEEP
c#.netasp.net-mvc
Saif Obeidat
Saif Obeidat

Reputation: 148

Calling ActionResult from controller differs than Calling it from View, I need them the same

I have a Controller which handles the Payment process, when I call it from the View like the below:

<input type="button" value="Create" onclick="location.href='@Url.Action("Pay", "Payment")'" />

It works fine, and it redirects me to PayPal Gateway .

But it doesn't work when I call the same method on a certain event from another controller like the below :

 PaymentController payment = new PaymentController();
 payment.PaymentWithPaypal(obj.Amount);

Here's a piece of code from the Payment Controller :

    [System.Web.Http.HttpPost]
    public ActionResult PaymentWithPaypal(string amount)
    {

        //getting the apiContext  
       APIContext apiContext = PaypalConfiguration.GetAPIContext();
        try
        {

            string payerId = Request.Params["PayerID"];
            if (string.IsNullOrEmpty(payerId))
            {...}
        }
     }

I got this error :

{"Object reference not set to an instance of an object."} System.Exception {System.NullReferenceException}

it seems that the "Request" is null, and it has not HttpContext !

Okay what I need is to simulate the exact behavior of calling an ActionResult from a view .

Many Thanks,

Upvotes: 0

Views: 33

Answers (1)

nvoigt
nvoigt

Reputation: 77294

Apart from the technical problems, what would you expect to happen? You cannot redirect to a different page in the middle of a controller call.

If you want to redirect to the action as the end of your controller call, use RedirectToAction:

return RedirectToAction("PaymentController", "PaymentWithPaypal", new { PayerID = playerId, Amount = "$1.234" });

You could also call the controller method directly, if you made sure that you don't touch all the behind the scenes http logic. Why is PayerID not a method parameter? If you make it a method parameter, it would be much easier to write automated tests, too.

Upvotes: 1

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