How to post data using HttpClient?

Question

I have got this HttpClient from Nuget.

When I want to get data I do it this way:

var response = await httpClient.GetAsync(url); var data = await response.Content.ReadAsStringAsync(); 

But the problem is that I don't know how to post data? I have to send a post request and send these values inside it: comment="hello world" and questionId = 1. these can be a class's properties, I don't know.

Update I don't know how to add those values to HttpContent as post method needs it. httClient.Post(string, HttpContent);

Answer 1

You need to use:

await client.PostAsync(uri, content); 

Something like that:

var comment = "hello world"; var questionId = 1;  var formContent = new FormUrlEncodedContent(new[] {     new KeyValuePair<string, string>("comment", comment),      new KeyValuePair<string, string>("questionId", questionId)  });  var myHttpClient = new HttpClient(); var response = await myHttpClient.PostAsync(uri.ToString(), formContent); 

And if you need to get the response after post, you should use:

var stringContent = await response.Content.ReadAsStringAsync(); 

Hope it helps ;)

Answer 2

Try to use this:

using (var handler = new HttpClientHandler() { CookieContainer = new CookieContainer() }) {     using (var client = new HttpClient(handler) { BaseAddress = new Uri("site.com") })     {         //add parameters on request         var body = new List<KeyValuePair<string, string>>         {             new KeyValuePair<string, string>("test", "test"),             new KeyValuePair<string, string>("test1", "test1")         };          HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "site.com");          client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded; charset=UTF-8"));         client.DefaultRequestHeaders.Add("Upgrade-Insecure-Requests", "1");         client.DefaultRequestHeaders.Add("X-Requested-With", "XMLHttpRequest");         client.DefaultRequestHeaders.Add("X-MicrosoftAjax", "Delta=true");         //client.DefaultRequestHeaders.Add("Accept", "*/*");          client.Timeout = TimeSpan.FromMilliseconds(10000);          var res = await client.PostAsync("", new FormUrlEncodedContent(body));          if (res.IsSuccessStatusCode)         {             var exec = await res.Content.ReadAsStringAsync();             Console.WriteLine(exec);         }                         } }