网页抓取的一个小例子

protected void GetHtml() {
        string url = "http://www.baidu.com/";
       HttpWebRequest wRequest = (HttpWebRequest)WebRequest.Create(url); //设置请求的url
       wRequest.Method = "Post";
       wRequest.ContentType = "application/x-www-form-urlencoded";
       wRequest.Timeout = 1000*60;
       byte[] charbyte = System.Text.Encoding.Default.GetBytes(url);  //格式化参数
       wRequest.ContentLength = charbyte.Length;
       StreamWriter sw = new StreamWriter(wRequest.GetRequestStream()); //字节流
       try { 
           sw.Write(url);
       }catch(Exception ex ){
           
       }finally {
           sw.Close();
       }

       StreamReader sr = new StreamReader(wRequest.GetResponse().GetResponseStream()); //开始接受服务器回传
       string responseData = sr.ReadToEnd();
       backResponse.InnerText = responseData;   //得到结果
    }

    
   
   来给结果上个图，有图有真相：
    

   也许你说，这么一大堆乱码，看着就头疼，怎么处理呢？下篇我们讲学习正则表达式，谢谢！