获取HTML代码用 像阿里巴巴

 

 

 public string GetHtml(string url)

        {

 

            string html = String .Empty;

            HttpWebRequest rt = null ;

            HttpWebResponse rs = null ;

            Stream stream = null ;

            StreamReader sr = null ;

 

            try

            {

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

                rs = ( HttpWebResponse)rt.GetResponse();

                stream = rs.GetResponseStream();

                sr = new StreamReader (stream, System.Text.Encoding.UTF8);

                html = sr.ReadToEnd();

 

            }

            catch (Exception ee)

            {

 

            }

            finally

            {

                sr.Close();

                stream.Close();

                rs.Close();

            }

            return html;

        }

 

        public string GetStringByUrl(Uri uri)

        {

            string result = null ;

            using (WebClient wc = new WebClient())

            {

                wc.Encoding = Encoding.UTF8;

                try

                {

                    result = wc.DownloadString(uri);

                    return result;

                }

                catch (Exception ex)

                {

                    result = ex.Message;

                    return result;

                }

            }

        }

 

        public string GetHtml2(string url)

        {

            string line;

            string str = string .Empty;

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

            webrequest.CookieContainer = new CookieContainer ();

            webrequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)";

            HttpWebResponse WebRespnse = (HttpWebResponse )webrequest.GetResponse();

            System.IO. StreamReader sr = new StreamReader(WebRespnse.GetResponseStream(), System.Text.Encoding.GetEncoding("GB2312" ));

            while ((line = sr.ReadLine()) != null )

            {

 

                str = str + line;

            }

 

            return str;

        }

 

 

 

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http://zhidao.baidu.com/question/353732926.html

读取txt文件

StreamReader sr = new StreamReader(“这里写路径”,Encoding.Default); string s; while ((s = sr.ReadLine()) != null) { //上面一行一行读。然后在里面就看你自己怎么处理了。下面是假设。        if(s=="2001")      {        TEXTBOX1.Text=s;        } }