Post request is empty (ASP.NET Core)

Question

I want to send a post request and add data to the database table.

Here is my model:

public partial class PaymentMethods
{
    public PaymentMethods()
    {
        PaymentToUser = new HashSet<PaymentToUser>();
    }

    public int Id { get; set; }
    public int? CardNumber { get; set; }
    public int? Month { get; set; }
    public int? Year { get; set; }
    public int? Cvv { get; set; }
    public string Name { get; set; }
    public string Surname { get; set; }
    public string Index { get; set; }
    public string Country { get; set; }

    public ICollection<PaymentToUser> PaymentToUser { get; set; }
}

Here is the Controller method that receives POST request:

[HttpPost]
public JsonResult AddPaymentMethod(PaymentMethods payment)
{
     string result;
     if(ModelState.IsValid)
     {
         _context.PaymentMethods.Add(payment);
         _context.SaveChanges();
         result = "Added";
     }
     else
     {
         result = "Error";
     }

     return Json(result);
}

And here is the JSON that I am sending via Postman:

{ "CardNumber": 2345678912343456, "Month": 10, "Year": 20, "CVV": 322, "Name": "Eugene", "Surname": "Sukhomlyn", "Index": 83050, "Country": "UA" }

So I think all great with data, but I get the empty object in controller method on the post, where is my error?

2.3 quadrillion definitely won't fit into an int. I suspect a credit card number should probably be a string, no? Do you ever need to perform math on a credit card number? — David
– David, Commented Aug 29, 2018 at 20:32
@David You may not do math on it directly. But you might be surprised to find out that a Luhn algorithm is implemented for many credit card numbers. I found out about this algorithm when working on medical provider numbers in the healthcare industry and thought it was really neat. — mason
– mason, Commented Aug 29, 2018 at 20:53
@EugeneSukh You need to add [FromBody] before the input parameter like this: public JsonResult AddPaymentMethod([FromBody] PaymentMethods payment) — Mohsin Mehmood
– Mohsin Mehmood, Commented Aug 29, 2018 at 21:14

maccettura · Accepted Answer · 2018-08-29 21:34:43Z

2

Try putting [FromBody] in method parameter if you are passing json from body.

edited Aug 29, 2018 at 21:34

maccettura

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answered Aug 29, 2018 at 21:16

Lokesh Agarwal

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1 Comment

maccettura Over a year ago

This is really more of a comment than an answer. I see that you are new to Stack Overflow, you can comment once you receive 50 reputation.

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