有关获取带有框架的网页内容

Question

想做一个爬虫，但是碰到带有框架的网页的就无法获取了，以下是获取网页的代码，请教如何操作                    HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(a_strUrl+"&page="+i.ToString ());                    myHttpWebRequest.Timeout = 20 * 1000;
                    myHttpWebRequest.Method = "GET";                    myHttpWebRequest.Headers.Add(HttpRequestHeader.AcceptLanguage, "en-US ");
                    myHttpWebRequest.Headers.Add(HttpRequestHeader.AcceptEncoding, "utf-8 ");
                    myHttpWebRequest.UserAgent = "Mozilla/4.0(compatible;MSIE 7.0;Windows NT 5.2;.NET CLR 1.1.4322;.NET CLR 2.0.50727;InfoPath.1;.NET CLR 3.0.04506.30)";
                    HttpWebResponse response = (HttpWebResponse)myHttpWebRequest.GetResponse();
                    if (response.StatusCode == HttpStatusCode.OK)
                    {
                        Stream responseStream = response.GetResponseStream();
                        StreamReader sr = new StreamReader(responseStream, Encoding.Default);
                        content = content + sr.ReadToEnd();
                        sr.Close();
                        responseStream.Close();
                        response.Close();
                        Thread.Sleep(3000);                    }