C#获取网页内容的三种方式

static void Main(string[] args)
{
    try {
        WebClient MyWebClient = new WebClient();        
        MyWebClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据
        Byte[] pageData = MyWebClient.DownloadData(“http://www.163.com”); //从指定网站下载数据
        string pageHtml = Encoding.Default.GetString(pageData);  //如果获取网站页面采用的是GB2312，则使用这句    
        //string pageHtml = Encoding.UTF8.GetString(pageData); //如果获取网站页面采用的是UTF-8，则使用这句
        Console.WriteLine(pageHtml);//在控制台输入获取的内容
        using (StreamWriter sw = new StreamWriter("c:\\test\\ouput.html"))//将获取的内容写入文本
        {
            sw.Write(pageHtml);
        }
        Console.ReadLine(); //让控制台暂停,否则一闪而过了    
    }
    catch(WebException webEx) {
        Console.WriteLine(webEx.Message.ToString());
    }
}

WebBrowser web = new WebBrowser(); 
web.Navigate("http://www.xjflcp.com/ssc/"); 
web.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(web_DocumentCompleted); 
void web_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) 
        { 
            WebBrowser web = (WebBrowser)sender; 
            HtmlElementCollection ElementCollection = web.Document.GetElementsByTagName("Table"); 
            foreach (HtmlElement item in ElementCollection) 
            { 
                 File.AppendAllText("Kaijiang_xj.txt", item.InnerText); 
            } 
        }