C#调用webservers接口rest风格事例

               public string Query(实体类名 holder)
　　　　　　　　{
                if (encoding == null)
                encoding = Encoding.UTF8;
　　　　　　　　　
                //获取URL
                string hybUrl = "";
                //获取URL账号和密码
                //账号
                string UrlUser = "";
                //密码
                string UrlPwd = "";
                
                WebClient wc = new WebClient();
                wc.Credentials = new NetworkCredential(UrlUser, UrlPwd);
                // 采取POST方式必须加的Header
                wc.Headers.Add("Content-Type", "application/xml");
                wc.Headers.Add("Authorization", "Basic aGFuZDp4MmpzdA==");

                string paramStr = "";
                XmlSerializer xz = new XmlSerializer(holder.GetType());
                XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
                using (StringWriter sw = new StringWriter())
                {
                    ns.Add("", "");
                    xz.Serialize(sw, holder, ns);
                    paramStr = sw.ToString();
                }
                paramStr = paramStr.Replace(@"<?xml version=""1.0"" encoding=""utf-16""?>", "");
                
                byte[] postData = encoding.GetBytes(paramStr);
                wc.Headers.Add("ContentLength", postData.Length.ToString());

                byte[] responseData = wc.UploadData(hybUrl, "POST", postData); // 得到返回字符流
                res = encoding.GetString(responseData);// 解码    
　　　　　　}