Xamarin/C# POST to RESTful api

Question

Apologies if this is a stupid question, i've been thrown onto a project with very little prior C#/Xamarin knowledge and I've been banging my head against a wall with this for some time.

So...

I'm trying to make a post call to SagePay API (https://test.sagepay.com/documentation/#card-identifiers)

I've been accessing our API and i've accessed the other SagePay API fine,

what i'm having issues with is that this call is a 'nested' json (apologies for incorrect terminology)

How do I go about submitting a POST in this format

{
"cardDetails":
    {
        "cardholderName": "SAM JONES",
        "cardNumber": "4929000000006",
        "expiryDate": "0320",
        "securityCode": "123"
    }
}

Answer 1

You have your objects created in that link (json2csharp):

public class CardDetails
{
    public string cardholderName { get; set; }
    public string cardNumber { get; set; }
    public string expiryDate { get; set; }
    public string securityCode { get; set; }
}

public class RootObject
{
    public CardDetails cardDetails { get; set; }
}

To serialize (JSON.Net):

var cardIdentifier = new RootObject{
    cardDetails = new CardDetails{
        cardholderName = "EdSF", 
        cardNumber = "4111111111111111", 
        expiryDate = "0320", 
        securityCode = "123"
    }
};


Console.WriteLine(JsonConvert.SerializeObject(cardIdentifier));

Result:

{
  "cardDetails": {
    "cardholderName": "EdSF",
    "cardNumber": "4111111111111111",
    "expiryDate": "0320",
    "securityCode": "123"
  }
}

Hth....