Trying to get HttpClient to work on .Net


I use the HttpClient on multiple platforms IOS, Android, Windows and want to use it to connect and download data via this service. this is how far I have got I change the username for my username and the apikey with the one sent in the email, I am getting authentication errors, also don’t know how to pass parameters like airport etc, I just need one working example to get me going.

thank you.

public async Task GetArrivals() {
var message = new HttpRequestMessage();
var content = new MultipartFormDataContent();
message.Method = HttpMethod.Post;
message.Content = content;
message.RequestUri = new Uri(“”);
string result = “”;
try {
using (HttpClient client = new HttpClient()) {
var operation = client.SendAsync(message, HttpCompletionOption.ResponseHeadersRead);
result = await operation.Result.Content.ReadAsStringAsync();
return result.ToString();
} catch (Exception ex) {
if (ex.InnerException.Message.ToString().IndexOf(“ConnectFailure”, StringComparison.CurrentCultureIgnoreCase) > -1) {
return “”;
return null;


You should be able to do something like this:

using System;
using System.Threading.Tasks;
using System.Net;
using System.Net.Http;

namespace ConsoleApplication1
    class Program
        static var username = "xxxxxxxx";
        static var ApiKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

        static async Task makeRequest()
            var ApiBaseUrl = new Uri("");

            var credentials = new NetworkCredential(username, ApiKey);
            var handler = new HttpClientHandler { PreAuthenticate = true, Credentials = credentials };

            var http = new HttpClient(handler);
            HttpResponseMessage response = await http.GetAsync(ApiBaseUrl);
            if (response.Content.Headers.ContentType.MediaType == "application/json")
                var rawbody = await response.Content.ReadAsStringAsync();
                Console.Write("Got JSON body:");

        static void Main(string] args)


Thanks very much for the reply, sorry for the delay in reading the post I did not get a notification of the post via email so I just by chance had a look and found the reply.

This works thanks, now I am using enroute and need to if possible work out the inbound terminal number as there is 5 in total in heathrow, if this is not possible is there a list somewhere I can pull down with flight information and what terminal that comes into?

thanks for your help.