c# httpclient post json code example

Example 1: c# httpclient post json stringcontent

private static async Task PostBasicAsync(object content, CancellationToken cancellationToken)
{
    using (var client = new HttpClient())
    using (var request = new HttpRequestMessage(HttpMethod.Post, Url))
    {
        var json = JsonConvert.SerializeObject(content);
        using (var stringContent = new StringContent(json, Encoding.UTF8, "application/json"))
        {
            request.Content = stringContent;

            using (var response = await client
                .SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken)
                .ConfigureAwait(false))
            {
                response.EnsureSuccessStatusCode();
            }
        }
    }
}

Example 2: httpclient post c# json

var httpClient = new HttpClient();
  var json = JsonConvert.SerializeObject(ticket);
  var content = new StringContent(json, Encoding.UTF8, "application/json");
  await httpClient.PostAsync("https://address.com", content);

Example 3: example HttpClient c# Post

//Base code from: http://zetcode.com/csharp/httpclient/
public async string Example() 
{
  	//The data that needs to be sent. Any object works.
	var pocoObject = new 
	{
	  	Name = "John Doe",
		Occupation = "gardener"
	};

  	//Converting the object to a json string. NOTE: Make sure the object doesn't contain circular references.
	string json = JsonConvert.SerializeObject(pocoObject);
  	
  	//Needed to setup the body of the request
	StringContent data = new StringContent(json, Encoding.UTF8, "application/json");

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

  	//Pass in the full URL and the json string content
	var response = await client.PostAsync(url, data);

  	//It would be better to make sure this request actually made it through
	string result = await response.Content.ReadAsStringAsync();
  	
  	//close out the client
  	client.Dispose();
  
	return result;
}

Example 4: 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 5: c# .net 3.5 post json httpclient

System.Net.WebClient client = new System.Net.WebClient();
 client.Headers.Add("content-type", "application/json");//set your header here, you can add multiple headers
 string s = Encoding.ASCII.GetString(client.UploadData("http://localhost:1111/Service.svc/SignIn", "POST", Encoding.Default.GetBytes("{\"EmailId\": \"[email protected]\",\"Password\": \"pass#123\"}")));