获得榜单的前166部电影的评分总和(http://movie.douban.com/top250)
using System; using System.IO; using System.Net; using System.Text; using System.Text.RegularExpressions; namespace ConsoleApplication1 { class Program { public static string GetUrlRequerstInfo(string url) { string strBuff = ""; Uri httpURL = new Uri(url); HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(httpURL); HttpWebResponse httpResp = (HttpWebResponse)httpReq.GetResponse(); Stream respStream = httpResp.GetResponseStream(); StreamReader respStreamReader = new StreamReader(respStream, Encoding.UTF8); strBuff = respStreamReader.ReadToEnd(); return strBuff; } static void Main(string[] args) { int len = 250 / 25; string result = ""; int start = 0; string regex2 = "<span class="rating_num" property="v:average">.+</span>"; Regex re = new Regex(regex2); int num = 0;//总分 bool isEnd = false; decimal total = 0; for (int i = 0; i < len; i++) { if (!isEnd) { start = i * 25; result = GetUrlRequerstInfo("http://movie.douban.com/top250?start=" + start + "&filter="); MatchCollection matches = re.Matches(result); System.Collections.IEnumerator enu = matches.GetEnumerator(); while (enu.MoveNext() && enu.Current != null) { Match match = (Match)(enu.Current); string s = match.Value; try { total += Convert.ToDecimal(s.Replace("<span class="rating_num" property="v:average">", "").Replace("</span>", "")); num++; if (num == 166) { isEnd = true; break; } } catch (Exception) { } } } } Console.WriteLine(total); Console.Read(); } } }