private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
        {
            url = webBrowser1.Url.ToString();
            if (!e.Url.ToString().Contains("welcome.php"))
                return;
            if (url == "http://192.168.1.8/mainFrame.php" && e.Url.ToString() == "http://192.168.1.8/attendance/welcome.php")
            {
                try
                {
                     HtmlDocument doc = webBrowser1.Document.Window.Frames["mainFrame"].Document;  
                    for (int i = 0; i <doc.All.Count; i++)
                    {
                        Console.WriteLine(i + "  " +doc.All[i].TagName.ToString());
                    }
                                
                } catch (Exception ex)
                {

                    throw ex;
                }
            }
        }
无法获得全部的元素，大约能获取38个，而这个框架中大约有100多个，不知道咋么获得全部元素并对一部分元素进行操作

速度来人啊，在线等