/// <summary>

        /// 获取源代码

        /// </summary>

        /// <param name="url"></param>

        /// <param name="encoding"></param>

        /// <returns></returns>

        public string GetPage(string url, string PointStr,Encoding Ec

        {

            HttpWebRequest request = null;

            HttpWebResponse webResponse = null;

            try

            {

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

                request.AllowAutoRedirect = true;

                request.Timeout = 5000;

                request.ReadWriteTimeout = 5000;

                //request.KeepAlive = true;

                request.Method = "GET";

                //request.ImpersonationLevel = System.Security.Principal.TokenImpersonationLevel.Anonymous;

                request.UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";

                webResponse = (HttpWebResponse)request.GetResponse();

                using (System.IO.Stream stream = webResponse.GetResponseStream())

                {

                    using (System.IO.StreamReader reader2 = new StreamReader(stream, Ec))

                    {

                        return reader2.ReadToEnd();

                    }

                }

            }

            catch

            {

                //Main.St.Add(url+"----"+ex.ToString());

                return "";

            }

            finally

            {

                if (request != null)

                {

                    request = null;

                }

                if (webResponse != null)

                {

                    webResponse.Close();

                    webResponse = null;

                }

            }

        }