var url = "http://api-11.78tp.com/api.php?json=0&v=1&key=aa540651389"; var httpRequest = (HttpWebRequest)WebRequest.Create(url); httpRequest.Method = "POST"; httpRequest.Accept = "application/json"; httpRequest.ContentType = "application/x-www-form-urlencoded"; var data = "wenzhang=%E5%BA%8A%E5%89%8D%E6%98%8E%E6%9C%88%E5%85%89%EF%BC%8C%E7%96%91%E6%98%AF%E5%9C%B0%E4%B8%8A%E9%9C%9C%E3%80%82"; using (var streamWriter = new StreamWriter(httpRequest.GetRequestStream())) { streamWriter.Write(data); } var httpResponse = (HttpWebResponse)httpRequest.GetResponse(); using (var streamReader = new StreamReader(httpResponse.GetResponseStream())) { var result = streamReader.ReadToEnd(); } Console.WriteLine(httpResponse.StatusCode);