C# JSON with Chargify API

Question

I am new to C# and I am trying to convert a PHP script I have that creates subscriptions in Chargify (https://docs.chargify.com/api-introduction). Below is the code I am using. I hardcoded the JSON string for testing purposes. After a day of working out little kinks and errors, I finally got it to a point where I am getting a 422 error back, but I cannot for the life of me figure out what is causing it. I have read several posts on Stack Overflow concerning JSON and C# but nothing has helped. Hopefully, someone that has more experience can look at this and point out something I am missing. Thank you so much in advance for any insight into this matter.

   [HttpPost]
    public ActionResult Register(SignupViewModel regInfo)
    {

        string user = "xxxxxxxxxxxx";
        string password = "x";

        string jsonData = "{\"subscription\":{\"product_handle\":\"149-package\", \"coupon_code\" : \"\", \"customer_attributes\":{\"first_name\":\"Jerry\",\"last_name\":\"Jenkins\",\"email\":\"[email protected]\"},\"credit_card_attributes\":{\"full_number\":\"1\",\"expiration_month\":\"10\",\"expiration_year\":\"2020\"}, \"components\" : [{\"component_id\" : 80012, \"enabled\" : false}, {\"component_id\" : 80014, \"enabled\" : true}]}}";

        var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://o-asandbox.chargify.com/subscriptions.json");            
        var encodedStr = Convert.ToBase64String(Encoding.Default.GetBytes(string.Format("{0}:{1}", user, password)));            
        var authorizationKey = "Basic" + " " + encodedStr;    // Note: Basic case sensitive

        httpWebRequest.Headers.Add("Authorization", authorizationKey);
        httpWebRequest.Method = "POST";
        httpWebRequest.ContentType = "Content-Type: application/json";

        byte[] byteArray = Encoding.UTF8.GetBytes(jsonData);

        httpWebRequest.ContentLength = byteArray.Length;

        Stream dataStream = httpWebRequest.GetRequestStream();
        dataStream.Write(byteArray, 0, byteArray.Length);
        dataStream.Close();

        var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();

        return View();
    }

Answer 1

Your code is correct for sending JSON. The errorcode 422 is because of unprocessable data.

Search for '422' in their docs https://docs.chargify.com/api-charges They state that along with the errorcode there is a error-response in JSON format like:

{"errors":[
    "Memo: cannot be blank.",
    "Amount: is not a number."
  ]}

Correct the mentionend errors and you should be fine.