Question

I have followed the HttpClient samples but couldn’t figure it out how to post a method with 2 parameters.

Below is what I tried but it return bad gateway error:

        private async void Scenario3Start_Click(object sender, RoutedEventArgs e)
    {
        if (!TryUpdateBaseAddress())
        {
            return;
        }

        Scenario3Reset();
        Scenario3OutputText.Text += "In progress";

       string resourceAddress =  "http://music.api.com/api/search_tracks";
        try
        {
            MultipartFormDataContent form = new MultipartFormDataContent();
        //    form.Add(new StringContent(Scenario3PostText.Text), "data");
            form.Add(new StringContent("Beautiful"), "track");
            form.Add(new StringContent("Enimem"), "artist");

            HttpResponseMessage response = await httpClient.PostAsync(resourceAddress, form);
        }
        catch (HttpRequestException hre)
        {
            Scenario3OutputText.Text = hre.ToString();
        }
        catch (Exception ex)
        {
            // For debugging
            Scenario3OutputText.Text = ex.ToString();
        }
    }

I looked all over the internet, but couldn’t find any working examples or documents that show how to perform the http post method. Any materials or samples would help me a lot.

Answer 1

Try FormUrlEncodedContent instead of MultipartFormDataContent:

var content = new FormUrlEncodedContent(
    new List<KeyValuePair<string, string>>
    {
        new KeyValuePair<string, string>("track", "Beautiful"),
        new KeyValuePair<string, string>("artist", "Enimem")
    }
);