Is it possible to remove quotations from AddParameter method RestSharp?

Question

I've ran into a problem with RestSharp. I need to make a POST call but with the quotation marks it doesn't work.

The JSON needs to look like this:

{
  "api_key": "<api key>",
  "controller": "invoice",
  "action": "add",
    "DebtorCode": "DB10000",
    "Term": 14,
    "InvoiceLines": [{"ProductCode":"P0001","Number":15},{"ProductCode":"P0002","Number":15},{"ProductCode":"P0003","Number":15}]
}

But when I send my request it is received as this: causing it to fail.

{
   "api_key": "<api key>",
   "controller": "invoice",
   "action": "add",
   "DebtorCode": "DB10000",
   "Term": "14",
   "InvoiceLines": "[{\"ProductCode\":\"P0001\",\"Number\":15},{\"ProductCode\":\"P0002\",\"Number\":15},{\"ProductCode\":\"P0003\",\"Number\":15}]"
}

My code for this call is the following:

            var newInvoice = new InvoiceToSend();

            newInvoice.DebtorCode = invoiceItem.DebtorCode;
            newInvoice.Term = Convert.ToInt32(invoiceItem.Term);
            newInvoice.InvoiceLines = new List<InvoiceLines>();

            for (int i = 0; i < invoiceItem.InvoiceLines.Count; i++)
            {
                var newLine = new InvoiceLines();

                newLine.Number = Convert.ToInt32(invoiceItem.InvoiceLines[i].Number);
                newLine.ProductCode = invoiceItem.InvoiceLines[i].ProductCode;
                
                newInvoice.InvoiceLines.Add(newLine);
            }

            object invoiceLines = JsonConvert.SerializeObject(newInvoice.InvoiceLines);

            var request = new RestRequest(Method.POST)
            {
                AlwaysMultipartFormData = true
            };
            request.AddParameter("api_key", _options.ApiKey, ParameterType.GetOrPost);
            request.AddParameter("controller", "invoice", ParameterType.GetOrPost);
            request.AddParameter("action", "add", ParameterType.GetOrPost);
            request.AddParameter("DebtorCode", newInvoice.DebtorCode);
            request.AddParameter("Term", newInvoice.Term);
            request.AddParameter("InvoiceLines", invoiceLines);

            var response = Client.Execute(request);

Now i've seen a number of posts all over the internet saying you need to use AddBody or AddJsonBody instead of the AddParameter, but the receiver of my POST call doesn't accept "application/json" as a name, so that isn't working.

Is it possible with RestSharp to achieve what I want or do I have to find an alternative? If so, can you point me in the right direction?

Cheers and thanks in advance!

Answer 1

I've figured it out. Here's the answer if anyone ever stumbles acros the same issue:

I stopped trying to fix it with RestSharp. Instead I used HttpClient(). I added the api_key, controller and action to the InvoiceToSend model;

public class InvoiceToSend
{
    public string api_key { get; set; }
    public string controller { get; set; }
    public string action { get; set; }
    public string DebtorCode { get; set; }
    public int Term { get; set; }
    public List<InvoiceLines> InvoiceLines { get; set; }
}

public class InvoiceLines
{
    public string ProductCode { get; set; }
    public int Number { get; set; }
}

Then filled it with the data i needed;

            var newInvoice = new InvoiceToSend();

            newInvoice.api_key = _options.ApiKey;
            newInvoice.controller = "invoice";
            newInvoice.action = "add";
            newInvoice.DebtorCode = invoiceItem.DebtorCode;
            newInvoice.Term = Convert.ToInt32(invoiceItem.Term);
            newInvoice.InvoiceLines = new List<InvoiceLines>();

            for (int i = 0; i < invoiceItem.InvoiceLines.Count; i++)
            {
                var newLine = new InvoiceLines();

                newLine.Number = Convert.ToInt32(invoiceItem.InvoiceLines[i].Number);
                newLine.ProductCode = invoiceItem.InvoiceLines[i].ProductCode;
                
                newInvoice.InvoiceLines.Add(newLine);
            }

Then made the POST call using HttpClient():

            var client = new HttpClient();
            var json = JsonConvert.SerializeObject(newInvoice);
            var data = new StringContent(json);

            var response = await client.PostAsync(_options.BaseUrl, data);

Hope I can help someone with this in the future ;)