c# HTTP POST code example

Example 1: C# HttpClient POST request

using System;
using System.Text;
using System.Net.Http;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace HttpClientPost
{
    class Person
    {
        public string Name { get; set; }
        public string Occupation { get; set; }

        public override string ToString()
        {
            return $"{Name}: {Occupation}";
        }
    }

    class Program
    {
        static async Task Main(string[] args)
        {
            var person = new Person();
            person.Name = "John Doe";
            person.Occupation = "gardener";

            var json = JsonConvert.SerializeObject(person);
            var data = new StringContent(json, Encoding.UTF8, "application/json");

            var url = "https://httpbin.org/post";
            using var client = new HttpClient();

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

            string result = response.Content.ReadAsStringAsync().Result;
            Console.WriteLine(result);
        }
    }
}

Example 2: C# http post request with file

// Example to how you could handle it in PHP
echo $_POST['firstName'];
$name = $_POST['firstName'];
$image = $_FILES['profilePicture'];
$ds = DIRECTORY_SEPARATOR;
move_uploaded_file($image['tmp_name'], realpath(dirname(__FILE__)) . $ds . "uploads" . $ds . $image['name']);

Example 3: c# make http request

private static readonly HttpClient client = new HttpClient();

var responseString = await client.GetStringAsync("http://www.example.com/recepticle.aspx");

Example 4: how make a post request c#

//You can aquire RestSharp from Nuget package manager
  RestClient restClient = 
  new RestClient(string.Format("{0}/myservice/api/endpoint", "https://exampledomain.com:88"));
  RestRequest request = new RestRequest(Method.POST);
  request.RequestFormat = DataFormat.Json;
  request.AddJsonBody(data); //data is C# model for post request
  request.AddHeader("Accept", "application/pdf");
  var result = restClient.Execute(request);