c# winform 访问WebServices （通过Http方式）

第一步、编写WebServices服务方法

         [WebMethod]
         public void PostJson(string str, string bb)
         {
             Dictionary<string, object> DictResult = new Dictionary<string, object>();
             IList<Dictionary<string, string>> list = new List<Dictionary<string, string>>();
             /*此处提供的只是示例，实际项目中，按照具体业务*/
             for (int ii = ; ii < ; ii++)
             {
                 Dictionary<string, string> dict = new Dictionary<string, string>();
                 dict.Add("str", str);
                 dict.Add("bb", bb);
                 list.Add(dict);
             }
             /*此处提供的只是示例，实际项目中，按照具体业务*/
             if (str == "")
             {
                 DictResult.Add("Code", "");
                 DictResult.Add("Msg", "访问成功");
                 DictResult.Add("Result", list);
             }
             else
             {
                 DictResult.Add("Code", "-1");
                 DictResult.Add("Msg", "访问失败");
                 DictResult.Add("Result", null);
             }

             Tools.ConvertToJson(DictResult);
         }

Web方法返回的内容

第二步、编写Winform客户端的访问代码

  string HttpPost(string URL, string Para)
         {
             // 创建HttpWebRequest对象
             HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(URL);
             httpRequest.Method = "POST";
             httpRequest.ContentType = "application/x-www-form-urlencoded";
             byte[] bytes = Encoding.UTF8.GetBytes(Para);
             using (Stream reqStream = httpRequest.GetRequestStream())
             {
                 reqStream.Write(bytes, , bytes.Length);
                 reqStream.Flush();
             }
             try
             {
                 using (HttpWebResponse myResponse = (HttpWebResponse)httpRequest.GetResponse())
                 {
                     StreamReader sr = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
                     string responseString = sr.ReadToEnd();
                     return responseString;
                 }
             }
             catch (WebException ex)
             {
                 var res = (HttpWebResponse)ex.Response;
                 StreamReader sr = new StreamReader(res.GetResponseStream(), Encoding.UTF8);
                 string str = sr.ReadToEnd();
                 return str;
             }
         }

第三步、设计调用界面

第四步、执行调用方法

   private void button1_Click(object sender, EventArgs e)
         {
             string url = "http://localhost:6029/TestServ.asmx/PostJson";
             string Para = "str=11&bb=AA";
             textBox1.Text = HttpPost(url, Para);
         }

第五步、显示执行结果