请教一个怪怪的问题(关于抓取数据)

[haojuntu]

rt 搜狗浏览器,抓取数据的时候输入 搜索的关键字,请求不到数据.
有遇到的朋友帮忙提供一下思路,不胜感激! 下面的代码是搜索"管理"的信息,可是responseBody 的值是搜狗首页的值,
好像是这段代码判断网页是否加载完成没有起作用,谢谢各位帮忙看一下,分不够可以再加的..

 while (webBrowser1.ReadyState != WebBrowserReadyState.Complete)
                Application.DoEvents();

 private void button_ok_Click(object sender, EventArgs e)
        {
            Uri u = null;
            try
            {
                //u = new Uri(string.Format(Sogou.Sogou_URL, MyUnity.UrlEncode(text_weburl.Text.Trim())));
                u = new Uri("http://www.sogou.com");
            }
            catch
            {
                MessageBox.Show("对不起，页面路径不正确");
            }

            webBrowser1.Url = u;
            i = 0;
            List = new List<HtmeModel>();
            webBrowser1.ScriptErrorsSuppressed = false;
            while (webBrowser1.ReadyState == WebBrowserReadyState.Uninitialized)
                Application.DoEvents();

            while (webBrowser1.ReadyState != WebBrowserReadyState.Complete)
                Application.DoEvents();

            HtmlElement query = webBrowser1.Document.All["query"];
            if (query == null)
                return;
            query.SetAttribute("value", "管理");
            HtmlElement sf = webBrowser1.Document.Forms["sf"];
            sf.InvokeMember("submit");

            while (webBrowser1.ReadyState != WebBrowserReadyState.Complete)
                Application.DoEvents();

            webBrowser1.Width = webBrowser1.Document.Body.ScrollRectangle.Width;
            webBrowser1.Height = webBrowser1.Document.Body.ScrollRectangle.Height;
            Stream responseStream = webBrowser1.DocumentStream;
            StreamReader readofstream = new StreamReader(responseStream, System.Text.Encoding.GetEncoding("GB2312"));
            string responseBody = readofstream.ReadToEnd();
            responseStream.Close();
            responseStream.Dispose();

           
        }
    

[yangbo2414]

文档加载事件 写出来试试···

 webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);

        void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            webBrowser1.Document.All["username"].SetAttribute("Value", "xxxxx");
}           

[萧炎]

获取网页源码 然后搜索吗？

[haojuntu]

是先输入搜索的关键字,然后用post提交,请求数据,现在问题是请求不到数据,稍等我把图片帖出来.

[haojuntu]

输入关键字 ,然后搜索
应该请求到的结果是
实际接收到的结果为

想要的结果是管理关键字的,html代码.
大家帮忙看一下啊

[haojuntu]

自己整出来了

   System.Windows.Forms.WebBrowser web = new System.Windows.Forms.WebBrowser();
            web.ScriptErrorsSuppressed = false;
            web.Url = new Uri("http://www.sogou.com");
            while (web.ReadyState != System.Windows.Forms.WebBrowserReadyState.Interactive)
            {
                if (web.ReadyState == System.Windows.Forms.WebBrowserReadyState.Complete)
                {
                    break;
                }
                System.Windows.Forms.Application.DoEvents();
            }
            System.Windows.Forms.HtmlElement query = web.Document.All["query"];
            if (query == null)
                return;
           // query.InnerText = keyword;
            query.SetAttribute("value", keyword);
            System.Windows.Forms.HtmlElement sf = web.Document.Forms["sf"];
            sf.InvokeMember("submit");

            System.Threading.Thread.Sleep(500);
            while (web.ReadyState != System.Windows.Forms.WebBrowserReadyState.Interactive)
            {
                System.Windows.Forms.Application.DoEvents();
                if (web.ReadyState == System.Windows.Forms.WebBrowserReadyState.Complete)
                {
                    System.Windows.Forms.Application.DoEvents();
                    break;
                }
            }
            Stream responseStream = web.DocumentStream;
            StreamReader readofstream = new StreamReader(responseStream, System.Text.Encoding.GetEncoding("GB2312"));
            string responseBody = readofstream.ReadToEnd();
            responseStream.Close();
            responseStream.Dispose();