1 HtmlWeb web = new HtmlWeb();
 2             HtmlDocument doc = web.Load("http://weixin.sogou.com");
 3             HtmlNode node = doc.GetElementbyId("pc_0_0");//输出node中找不到span_s1节点
 4             StreamWriter sw = File.CreateText("log.txt");
 5             foreach (HtmlNode child in node.ChildNodes)
 6             {
 7                 if (child.Name != "li")
 8                     continue;
 9                 HtmlNode hn = HtmlNode.CreateNode(child.OuterHtml);
10                 
11                 Write(sw, String.Format("公众号：{0}", hn.SelectSingleNode("//*[@class=\"account\"]").InnerText));
12                 Write(sw, String.Format("地址：{0}", hn.SelectSingleNode("//*[@class=\"account\"]").Attributes["href"].Value));
13                 Write(sw, String.Format("标题：{0}", hn.SelectSingleNode("//h3").InnerText));
14                 Write(sw, String.Format("地址：{0}", hn.SelectSingleNode("//h3").SelectSingleNode("//a").Attributes["href"].Value));
15                 Write(sw, String.Format("缩略图：{0}", hn.SelectSingleNode("//*[@class=\"img-box\"]").SelectSingleNode("//img").Attributes["src"].Value));
16                 //Write(sw, String.Format("阅读量：{0}", hn.SelectSingleNode("//*[@class=\"s1\"]").InnerText)); //节点找不到
17                 Write(sw, String.Format("简介：{0}", hn.SelectSingleNode("//*[@class=\"txt-info\"]").InnerText));
18             }
19             sw.Close();
20             Console.ReadLine();