//根據Url地址得到網頁的html源碼private string GetWebContent(string Url){string strResult="";try{HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);//聲明一個HttpWebRequest請求request.Timeout = 30000;//設置連接超時時間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);strResult = streamReader.ReadToEnd();}catch{MessageBox.Show("出錯");}return strResult;} 為了使用HttpWebRequest和HttpWebResponse，需填名字空間引用using System.Net;以下是程序具體實現過程： private void button1_Click(object sender, EventArgs e){//要抓取的URL地址string Url = "http://list.mp3.baidu.com/topso/mp3topsong.html?id=1#top2";//得到指定Url的源碼string strWebContent = GetWebContent(Url);richTextBox1.Text = strWebContent;//取出和數據有關的那段源碼int iBodyStart = strWebContent.IndexOf("<body", 0);int iStart = strWebContent.IndexOf("歌曲TOP500", iBodyStart);int iTableStart = strWebContent.IndexOf("<table", iStart);int iTableEnd = strWebContent.IndexOf("</table>", iTableStart);string strWeb = strWebContent.Substring(iTableStart, iTableEnd - iTableStart + 8);//生成HtmlDocumentWebBrowser webb = new WebBrowser();webb.Navigate("about:blank");HtmlDocument htmldoc = webb.Document.OpenNew(true);htmldoc.Write(strWeb);HtmlElementCollection htmlTR = htmldoc.GetElementsByTagName("TR");foreach (HtmlElement tr in htmlTR){string strID = tr.GetElementsByTagName("TD")[0].InnerText;string strName = SplitName(tr.GetElementsByTagName("TD")[1].InnerText, "MusicName");string strSinger = SplitName(tr.GetElementsByTagName("TD")[1].InnerText, "Singer");strID = strID.Replace(".", "");//插入DataTableAddLine(strID, strName, strSinger,"0");string strID1 = tr.GetElementsByTagName("TD")[2].InnerText;string strName1 = SplitName(tr.GetElementsByTagName("TD")[3].InnerText, "MusicName");string strSinger1 = SplitName(tr.GetElementsByTagName("TD")[3].InnerText, "Singer");//插入DataTablestrID1 = strID1.Replace(".", "");AddLine(strID1, strName1, strSinger1,"0");string strID2 = tr.GetElementsByTagName("TD")[4].InnerText;string strName2 = SplitName(tr.GetElementsByTagName("TD")[5].InnerText, "MusicName");string strSinger2 = SplitName(tr.GetElementsByTagName("TD")[5].InnerText, "Singer");//插入DataTablestrID2 = strID2.Replace(".", "");AddLine(strID2, strName2, strSinger2,"0");}//插入數據庫InsertData(dt);dataGridView1.DataSource = dt.DefaultView; }

轉載于:https://www.cnblogs.com/IT1517/articles/4731148.html

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