C\#Http Post 방식 으로 JSon 데이터 문자열 을 전달 하여 웹 서 비 스 를 호출 합 니 다.

[WebMethod]
    public string Project(string paramaters)
    {
      return paramaters;
    }

public string Post(string methodName, string jsonParas)
    {
      string strURL = Url + "/" + methodName;

      //    HTTP   
      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strURL);
      //Post     
      request.Method = "POST";
      //    
      request.ContentType = "application/x-www-form-urlencoded";

      //    ，   URL   
      //                   JsonParas(  ：[{\"UserID\":\"0206001\",\"UserName\":\"ceshi\"}])，
      //                    （ ："paramaters=[{\"UserID\":\"0206001\",\"UserName\":\"ceshi\"}]"），
      //   paramaters WebService        ，        Json     
      //          Url  
      string paraUrlCoded = System.Web.HttpUtility.UrlEncode("paramaters");
      paraUrlCoded += "=" + System.Web.HttpUtility.UrlEncode(jsonParas);

      byte[] payload;
      // Json         
      payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
      //     ContentLength  
      request.ContentLength = payload.Length;
      //    ，      

      Stream writer;
      try
      {
        writer = request.GetRequestStream();//           Stream  
      }
      catch (Exception)
      {
        writer = null;
        Console.Write("       !");
      }
      //        
      writer.Write(payload, 0, payload.Length);
      writer.Close();//     

      String strValue = "";//strValue http         
      HttpWebResponse response;
      try
      {
        //     
        response = (HttpWebResponse)request.GetResponse();
      }
      catch (WebException ex)
      {
        response = ex.Response as HttpWebResponse;
      }

      Stream s = response.GetResponseStream();

      //          XML      ，XML Content        Json  
      XmlTextReader Reader = new XmlTextReader(s);
      Reader.MoveToContent();
      strValue = Reader.ReadInnerXml();//  Content  Json  
      Reader.Close();
      s.Close();

      return strValue;//  Json  
    }