string tempip = "";

            try

            {

                HttpWebRequest wr = (HttpWebRequest)System.Net.WebRequest.Create("http://iframe.ip138.com/ic.asp");

                Stream s = wr.GetResponse().GetResponseStream();

                StreamReader sr = new StreamReader(s, Encoding.Default);

                string all = sr.ReadToEnd();

                int start = all.IndexOf("[") + 1;

                int end = all.IndexOf("]", start);

                tempip = all.Substring(start, end - start);

                sr.Close();

                s.Close();

            }

            catch

            {

            }

            return tempip;