如何抓取谷歌，百度里面特定的搜索结果！

如何抓取谷歌，百度里面特定的搜索结果！

在自己的网页里面写一个搜索引擎，输入搜索条件搜索后，在自己的页面里面显示抓取谷歌和百度里面的特定的搜索结果，例如搜索结果是百度里面的（第一，第五，第八条）+谷歌里面的（第一条，第四条）的搜索结果组合！

protected void Button1_Click(object sender, EventArgs e)
    {
       [color=#FF0000] Uri u = new Uri("http://www.google.cn/search?q="+TextBox1.Text+"&hl=zh-CN&ie=GB2312&lr=&nxpt=10.2068337957705091425725");
        HttpWebRequest dd = (HttpWebRequest)WebRequest.Create(u);[/color]        dd.Method = "GET";
        WebResponse req = dd.GetResponse();
        Stream str = req.GetResponseStream();
        StreamReader readerOfStream = new StreamReader(str, System.Text.Encoding.GetEncoding("GB2312"));
        string aa = readerOfStream.ReadToEnd();
        string abc = "";
        char aa1=(char)13;
        char aa2=(char)10;
        string Str = aa.Replace(aa1.ToString(), "").Replace(aa2.ToString(), "");
       

        [color=#FF9900]string StartStr = "<div><div class=g>[变量]";
        StartStr = StartStr.Replace("[变量]", ".*");
         string LastStr = "</div>";[/color]     
       
      
        string SearchStr = StartStr + ".*" + LastStr;
        Regex re = new Regex(SearchStr, RegexOptions.IgnoreCase);
        Match m = re.Match(aa);

        Response.Write(m.Value);
        str.Close();
    }

protected void Button1_Click(object sender, EventArgs e)
    {
       [color=#FF0000] Uri u = new Uri("http://www.google.cn/search?q="+TextBox1.Text+"&hl=zh-CN&ie=GB2312&lr=&nxpt=10.2068337957705091425725");
        HttpWebRequest dd = (HttpWebRequest)WebRequest.Create(u);[/color]        dd.Method = "GET";
        WebResponse req = dd.GetResponse();
        Stream str = req.GetResponseStream();
        StreamReader readerOfStream = new StreamReader(str, System.Text.Encoding.GetEncoding("GB2312"));
        string aa = readerOfStream.ReadToEnd();
        string abc = "";
        char aa1=(char)13;
        char aa2=(char)10;
        string Str = aa.Replace(aa1.ToString(), "").Replace(aa2.ToString(), "");
       

        [color=#FF9900]string StartStr = "<div><div class=g>[变量]";
        StartStr = StartStr.Replace("[变量]", ".*");
         string LastStr = "</div>";[/color]     
       
      
        string SearchStr = StartStr + ".*" + LastStr;
        Regex re = new Regex(SearchStr, RegexOptions.IgnoreCase);
        Match m = re.Match(aa);

        Response.Write(m.Value);
        str.Close();
    }