用asp.net(c#)获取网页源代码(两种方法)

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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;

}

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/yefengzhixia/archive/2009/07/01/4312127.aspx