public int Htmls(int id)        {            int result = 0;            string strHtmlContent = "";            HttpWebRequest request;            Encoding encoding = Encoding.GetEncoding("utf-8");            StreamReader sr = null;            StreamWriter sw = null;            string urls = "http://www.baidu.com/";            try            { //声明一个HttpWebRequest请求                request = (HttpWebRequest)WebRequest.Create(urls);                //连接超时时间                request.Timeout = 20000;                request.Headers.Set("Pragma", "no-cache");                HttpWebResponse response = (HttpWebResponse)request.GetResponse();                Stream streamHtmlCode = response.GetResponseStream();                sr = new StreamReader(streamHtmlCode, encoding);                strHtmlContent = sr.ReadToEnd();            }            catch (Exception ex)            {                result = 2;                Log.Write(urls + "=Message=" + ex.Message + " StackTrace=" + ex.StackTrace);                // System.Threading.Thread.Sleep(20000);            }            finally            {//                //  sr.Close();                request = null;            }            string fileName = id + ".html";            //写入            try            {                sw = new StreamWriter(HttpContext.Current.Server.MapPath("/shengxiao/jm/") + fileName, false, encoding);                sw.Write(strHtmlContent);                sw.Flush();                result = 1;            }            catch (Exception ex)            {                throw ex;            }            finally            {                if (sw != null)                {                    sw.Close();                }                // Response.Write(urls);            }            return result;        }