if (this.txturl.Text == "")            {                this.lblmess.Text = "请输入网址";            }            else            {                GetHttp getHttp = new GetHttp();                string url = "http://" + this.txturl.Text + "/uc_server/control/admin/db.php";                try                {                    string httpWebRequest = getHttp.GetHttpWebRequest(url);                    if (httpWebRequest.Contains("Access"))                    {                        this.lblmess.Text = "Discuz论坛程序!";                    }                    else                    {                        this.lblmess.Text = "非论坛";                    }                }                catch (WebException)                {                    MessageBox.Show("域名输入错误!");                }

 

public string GetHttpWebRequest(string url)        {            Uri requestUri = new Uri(url);            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(requestUri);            httpWebRequest.UserAgent = "User-Agent:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705";            httpWebRequest.Accept = "*/*";            httpWebRequest.KeepAlive = true;            httpWebRequest.Headers.Add("Accept-Language", "zh-cn,en-us;q=0.5");            HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();            Stream responseStream = httpWebResponse.GetResponseStream();            StreamReader streamReader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));            string result = streamReader.ReadToEnd();            streamReader.Close();            responseStream.Close();            httpWebResponse.Close();            return result;        }