Xamarin 中的 x-www-form-urlencoded

Question

我正在开发 Xamarin.Android 应用程序。我必须使用内容类型为 x-www-form-urlencoded 的 rest API。我无法成功调用 Rest API，在此之前，我使用了许多 Web 服务，但我是第一次研究这种类型的 API。我被困在这。我尝试了两种消费方式： public static string makePostEncodedRequest(string url, string jsonparams)    {        string ret = "";        var httpwebrequest = (HttpWebRequest)WebRequest.Create(url);        httpwebrequest.ContentType = "application/x-www-form-urlencoded";        //httpwebrequest.Accept = Config.JsonHeaderAJ;        httpwebrequest.Method = Methods.Post.ToString();        byte[] bytearray = Encoding.UTF8.GetBytes(jsonparams);        using (var streamWriter = new StreamWriter(httpwebrequest.GetRequestStream(), Encoding.ASCII))        {            streamWriter.Write(bytearray);            streamWriter.Flush();            streamWriter.Close();        }        var httpResponse = (HttpWebResponse)httpwebrequest.GetResponse();        using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))        {            ret = streamReader.ReadToEnd();        }        return ret;    }       下一个是：   Dictionary<string, string> requestParams = new Dictionary<string, string ();        requestParams.Add("value=", data1);        requestParams.Add("&value=", data2);        using (HttpClient client = new HttpClient())        {            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded"));            HttpResponseMessage response = client.PostAsync(Config.DomainURl + Config.StudentLoginUrl, new FormUrlEncodedContent(requestParams)).Result;            var tokne = response.Content.ReadAsStringAsync().Result;        }