用asp.net(c#)获取网页源代码(两种方法)

http://blog.sina.com.cn/s/blog_6e8dfbfa0100o5ec.html

方法一：webrequest

 private string GetStringByUrl(string strUrl)
    {
        WebRequest wrt = WebRequest.Create(strUrl);
        WebResponse wrse = wrt.GetResponse();
        Stream strM = wrse.GetResponseStream();
        StreamReader SR = new StreamReader(strM, Encoding.GetEncoding("gb2312"));
        string strallstrm = SR.ReadToEnd();
        return strallstrm;
    }

方法二：HttpWebRequest

 public static string GetPage(string url, Encoding encoding)

        {

            HttpWebRequest request = null;

            HttpWebResponse response = null;

            StreamReader reader = null;

            try

            {

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

                request.UserAgent = "www.svnhost.cn";

                request.Timeout = 20000;

request.AllowAutoRedirect = false;

                response = (HttpWebResponse)request.GetResponse();

                if (response.StatusCode == HttpStatusCode.OK && response.ContentLength < 1024 * 1024)

                {

                    reader = new StreamReader(response.GetResponseStream(), encoding);

                    string html = reader.ReadToEnd();

                    return html;

                }

            }

            catch

            {

            }

            finally

            {

                if (response != null)

                {

                    response.Close();

                    response = null;

                }
                if (reader != null)

                    reader.Close();

                if (request != null)

                    request = null;

            }

           return string.Empty;

        }