public static string GetHttpResponse(string url)

        {

            string content = "";

            // Create a new HttpWebRequest object.Make sure that

            // a default proxy is set if you are behind a fure wall.

            //其中,HttpWebRequest实例不使用HttpWebRequest的构造函数来创建,二是使用WebRequest的Create方法来创建.

            HttpWebRequest myHttpWebRequest1 = (HttpWebRequest)WebRequest.Create(url);

            //myHttpWebRequest1.Method = "POST";

            //myHttpWebRequest1.ContentType = "application/x-www-form-urlencoded";

            ////不维持与服务器的请求状态

            myHttpWebRequest1.KeepAlive = true;

            //myHttpWebRequest1.AllowAutoRedirect = false;

            //创建一个HttpWebRequest对象

            //Assign the response object of HttpWebRequest to a HttpWebResponse variable.\

            HttpWebResponse myHttpWebResponse1;

            try

            {

                myHttpWebResponse1 = (HttpWebResponse)myHttpWebRequest1.GetResponse();

                //设置页面的编码模式

                //System.Text.Encoding utf8 = System.Text.Encoding.gb;

                //System.Text.Encoding.GetEncoding("GB2312").GetString(System.Text.Encoding.UTF8.GetBytes("你的xml字符串"));

                Stream streamResponse = myHttpWebResponse1.GetResponseStream();

                StreamReader streamRead = new StreamReader(streamResponse, System.Text.Encoding.GetEncoding("GB2312"));

                Char[] readBuff = new Char[256];

                //这里使用了StreamReader的Read()方法,参数意指从0开始读取256个char到readByff中.

                //Read()方法返回值为指定的字符串数组,当达到文件或流的末尾使,方法返回0

                int count = streamRead.Read(readBuff, 0, 256);

                while (count > 0)

                {

                    String outputData = http://www.mamicode.com/new String(readBuff, 0, count);

                    content += outputData;

                    count = streamRead.Read(readBuff, 0, 256);

                }

                myHttpWebResponse1.Close();

                return content;

            }

            catch (WebException ex)

            {

                content = "在请求URL为：" + url.ToString() + " 的页面时产生错误，错误信息为" + ex.ToString();

                return content;

            }

        }

public static IdentlyInfo CredentialsInfo(string identity, string userName)

        {

            IdentlyInfo identlyInfo = new IdentlyInfo();

            string retStr = "";

            string url = "http://172.168.254.34:9090/NCIIS/PersonInfoServlet?id=" + identity + "&name=" + userName + "";

          //  strResult = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><data><status></status><id>身份证号码</id><name>姓名</name><photo>http://b.hiphotos.baidu.com/image/pic/item/f11f3a292df5e0fef825890b5e6034a85edf72fe.jpg</photo></data>";

            string strResult = GetHttpResponse(url);

            int start, end;

            string statusCode = "<status>";

           // string strorderstate = null;

            start = strResult.LastIndexOf(statusCode) + statusCode.Length;

            int starts = strResult.IndexOf("</status>");

            if (start != -1)

            {

                identlyInfo.status = strResult.Substring(start, starts - start);

            }

            string id = "<id>";

            //string strid = null;

            start = strResult.LastIndexOf(id) + id.Length;

            starts = strResult.IndexOf("</id>");

            if (start != -1)

            {

                identlyInfo.id = strResult.Substring(start, starts - start);

            }

            string name = "<name>";

            //string strname = null;

            start = strResult.LastIndexOf(name) + name.Length;

            starts = strResult.IndexOf("</name>");

            if (start != -1)

            {

                identlyInfo.name = strResult.Substring(start, starts - start);

            }

            string photo = "<photo>";

            //string strphoto = null;

            start = strResult.LastIndexOf(photo) + photo.Length;

            starts = strResult.IndexOf("</photo>");

            if (start != -1)

            {

                identlyInfo.photo = strResult.Substring(start, starts - start);

            }

            if (identlyInfo.status != "00")

            {

                retStr = "身份证和姓名不匹配！";

            }

            else

            {

                retStr = identlyInfo.photo;

            }

            return identlyInfo;

        }