public static string GetWebContent(string Url)

         {

             string strResult = "";

             try

             {

                 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);

                 //声明一个HttpWebRequest请求

                 request.Timeout = ;

                 //设置连接超时时间

                 request.Headers.Set("Pragma", "no-cache");

                 HttpWebResponse response = (HttpWebResponse)request.GetResponse();

                 Stream streamReceive = response.GetResponseStream();

                 Encoding encoding = Encoding.GetEncoding("GB2312");

                 StreamReader streamReader = new StreamReader(streamReceive, Encoding.UTF8);

                 strResult = streamReader.ReadToEnd();

             }

             catch

             {

                 MessageBox.Show("出错");

             }

             return strResult;

         }

 bool ContaintClass(HtmlElement li, string ClassName)

        {

            string Html = li.OuterHtml;

            string str = Html.Substring(, Html.IndexOf('>')-);

            if (str.Contains(ClassName))

                return true;

            else

                return false;

        }

 private void btn_GetList_Click(object sender, EventArgs e)

        {

            DataTable dt = new DataTable();

            dt.Columns.Add("OrderID");

            dt.Columns.Add("MusicName");

            dt.Columns.Add("Singer");

            string DataURL = (string)txt_DataURL.SelectedValue;

            if (String.IsNullOrEmpty(DataURL))

            {

                MessageBox.Show("数据来源不能为空！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);

            }

            string StrWebContent = GetHTMLContent.GetWebContent(DataURL);

            int ListStart = StrWebContent.IndexOf("<div class=\"top-list-item\">");

            int ULStart = StrWebContent.IndexOf("<ul", ListStart);

            int ULEnd = StrWebContent.IndexOf("</ul>", ULStart);

            string strweb = StrWebContent.Substring(ULStart, ULEnd);

            //生成HtmlDocument

            WebBrowser webb = new WebBrowser();

            webb.Navigate("about:blank");

            HtmlDocument htmldoc = webb.Document.OpenNew(true);

            htmldoc.Write(strweb);

            HtmlElementCollection htmlli = htmldoc.GetElementsByTagName("li");

            string ClassName_OrderID = "index-num";

            string ClassName_SontTitle = "song-title";

            string ClassName_Singer = "singer";

            string[] ClassNames = new string[] { ClassName_OrderID, ClassName_SontTitle, ClassName_Singer };

            foreach (HtmlElement li in htmlli)

            {

                HtmlElementCollection htmlSpan = li.GetElementsByTagName("span");

                string[] musicInfo = new string[];

                int i = ;

                int InfoIndex = ;

                while (i >=  && i < htmlSpan.Count)

                {

                    if (ContaintClass(htmlSpan[i], ClassNames[InfoIndex]))

                    {

                        musicInfo[InfoIndex] = htmlSpan[i].InnerText;

                        InfoIndex++;

                        if (InfoIndex > ) break;

                    }

                    i++;

                }

                DataRow dr = dt.NewRow();

                dr["OrderID"] = musicInfo[];

                dr["MusicName"] = musicInfo[];

                dr["Singer"] = musicInfo[];

                dt.Rows.Add(dr);

            }

            dataGridView1.DataSource = dt;

        }