转 winfrom如何通过http来进行通信，并且通过传递json格式的数据可接受json格式的数据

string username = this.textBox1.Text;  
            string password = this.textBox2.Text;  
            string AA = HttpUtility.UrlEncode(username, Encoding.UTF8);  
            string bb = HttpUtility.UrlEncode(password, Encoding.UTF8);  
            ASCIIEncoding encoding = new ASCIIEncoding();  
            String content = "";  
            try  
            {  
                string json = "{"uname":"" + AA + "","psw":"" + bb + "","param":"login"}";  
                MessageBox.Show(json);  
                JObject o = JObject.Parse(json);  
                String param = o.ToString();  
                byte[] data = encoding.GetBytes(param);  
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://192.168.10.30:8080/ss/aa.do?method=login");  
                request.KeepAlive = false;  
                request.Method = "POST";  
                request.ContentType = "application/json;characterSet:UTF-8";  
                request.ContentLength = data.Length;  
                Stream sm = request.GetRequestStream();  
                sm.Write(data, 0, data.Length);  
                sm.Close();  
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();  
                Stream streamResponse = response.GetResponseStream();  
                StreamReader streamRead = new StreamReader(streamResponse, Encoding.UTF8);  
                Char[] readBuff = new Char[256];  
                int count = streamRead.Read(readBuff, 0, 256);  
                while (count > 0)  
                {  
                    String outputData = new String(readBuff, 0, count);  
                    content += outputData;  
                    count = streamRead.Read(readBuff, 0, 256);  
                }  
                response.Close();  
                MessageBox.Show(content);  
                string jsons = content;  
                JObject jobject = JObject.Parse(jsons);  
                JsonReader read = jobject.CreateReader();  
                MessageBox.Show(read.ToString());  
                 
                MessageBox.Show(jobject.ToString());  
                //Dictionary<string, string>[] companies = content.Deserialize<Dictionary<string, string>[]>(content);  
                //foreach (var item in companies)  
                //{  
                //    MessageBox.Show(item);  
                //}  
  
            }  
            catch (Exception ex)  
            {  
            }  
            finally  
            {  
               
                
            }