c#下载网页源码的两种方法

1、WebClient：

System.Net.WebClient wc = new System.Net.WebClient();   
Byte[] pageData = wc.DownloadData("网页地址");   
string s= System.Text.Encoding.Default.GetString(pageData); 
//s = System.Text.Encoding.UTF8.GetString(pageData);去除中文乱码 

2、HttpRequest:

static class WebFunc   
{   
    private static CookieContainer cookie = new CookieContainer();   
    private static string contentType = "application/x-www-form-urlencoded";   
    private static string accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/x-silverlight-2-b1, */*";   
    private static string userAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)";   
   
    /// <summary>
    /// 
    /// </summary>
    /// <param name="url">网页地址</param>
    /// <param name="encoding">编码方式</param>
    /// <returns></returns>
    public static string GetHtmlEx(string url, Encoding encoding)   
    {   
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);   
        request.UserAgent = userAgent;   
        request.ContentType = contentType;   
        request.CookieContainer = cookie;   
        request.Accept = accept;   
        request.Method = "get";   
  
        WebResponse response = request.GetResponse();   
        Stream responseStream = response.GetResponseStream();   
        StreamReader reader = new StreamReader(responseStream, encoding);   
        String html = reader.ReadToEnd();   
        response.Close();   
  
        return html;   
    }   
}  

转自http://blog.csdn.net/adsdassadfasdfasdf/article/details/5831347