Web API with body content and C# / Html Calls

getValues.js

// NOTE: This is indicative (using jquery). It's not accurate for the related api.

function getValue1() {
  var request = $.ajax({
    url: 'http://localhost:5000/api/values?ID=1',
    type: "GET",
  });

  request.done(function (returnVal) {
    var returnAsString = JSON.stringify(returnVal);
  });

  request.fail(function (jqXHR, textStatus) {
    alert("Request failed: " + textStatus);
  });
}


function valuesPost() {

  var formData = $('#valuesForm').serializeArray().reduce(function (obj, item) {
    obj[item.name] = item.value;
    return obj;
  }, {});

  var request = $.ajax({
    url: 'http://localhost:5000/api/values',
    type: "POST",
    data: JSON.stringify(formData),
    contentType: "application/json; charset=utf-8",
    dataType: "json",
  });

  request.done(function (msg) {
    alert('Done ->' + msg);
  });

  request.fail(function (jqXHR, textStatus) {
    alert("Request failed: " + textStatus);
  });
}

Main.cs

// Calling client
class Program
	{
		static void Main(string[] args)
		{
			string answer = "";

			//string baseUrl = "http://localhost:56539/";
			string baseUrl = "http://169.254.80.80/winauth/";

			string getUrl = baseUrl + "api/Values/1";
			string postUrl = baseUrl + "api/Values";

			try
			{
				// Get Way 1
				WebRequest req = WebRequest.Create(getUrl);
				req.AuthenticationLevel = System.Net.Security.AuthenticationLevel.MutualAuthRequested;
				req.Credentials = CredentialCache.DefaultNetworkCredentials;
				WebResponse resp = req.GetResponse();
				StreamReader reader = new StreamReader(resp.GetResponseStream());
				answer = reader.ReadToEnd().Trim() + System.Environment.NewLine;

				// Get Way 2
				HttpWebRequest request = (HttpWebRequest)WebRequest.Create(getUrl);
				request.Credentials = CredentialCache.DefaultNetworkCredentials;
				using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
				using (Stream stream = response.GetResponseStream())
				using (StreamReader reader1 = new StreamReader(stream))
				{
					answer += reader1.ReadToEnd() + System.Environment.NewLine;
				}


				// POST
				var httpWebRequest = (HttpWebRequest)WebRequest.Create(postUrl);
				httpWebRequest.Credentials = CredentialCache.DefaultNetworkCredentials;
				httpWebRequest.ContentType = "application/json";
				httpWebRequest.Method = "POST";

				using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
				{
					var param1 = "Hello";
					var param2 = "World.";
					var param3 = "Nice To";
					var param4 = "meet you.";

					/*NOTE: If the commas are not at the end of each property, it can fail silently (they will default to nulls) */
					string json = "{\"item1\":\"" + param1 + "\"," +
										   "\"item2\":\"" + param2 + "\"," +
										   "\"item3\":\"" + param3 + "\"," +
										   "\"item4\":\"" + param4 + "\"}";

					streamWriter.Write(json);
					streamWriter.Flush();
					streamWriter.Close();
				}

				var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
				using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
				{
					answer += streamReader.ReadToEnd();					
				}

			}
			catch (Exception ex)
			{
				Console.WriteLine(ex.ToString());
			}

			Console.WriteLine(answer);
			Console.ReadLine();

		}
	}

ValuesController.cs

// API CONTENT

public class ValuesController : ApiController
    {

		public string Get(string id)
		{
			return "Test " + id;
		}

		[HttpPost]
		public string Post([FromBody] FourDetails details)
		{
			return details.Item1 + " " + details.Item2 + " " + details.Item3 + " " + details.Item4 + " ";
		}

	}


	public class FourDetails
	{
		public string Item1 { get; set; }
		public string Item2 { get; set; }
		public string Item3 { get; set; }
		public string Item4 { get; set; }

	}