Html Agility Pack简单例子

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using HtmlAgilityPack;namespace DemoCnBlogs{class Program{static void Main(string[] args){HtmlWeb web = new HtmlWeb();HtmlDocument doc = web.Load("http://www.cnblogs.com/pick/");HtmlNode node = doc.GetElementbyId("post_list");StreamWriter sw = File.CreateText("log.txt");foreach(HtmlNode child in node.ChildNodes){if (child.Attributes["class"] == null || child.Attributes["class"].Value != "post_item")continue;HtmlNode hn = HtmlNode.CreateNode(child.OuterHtml);///如果用child.SelectSingleNode("//*[@class=/"titlelnk/"]").InnerText这样的方式查询，是永远以整个document为基准来查询，///这点就不好，理应以当前child节点的html为基准才对。Write(sw, String.Format("推荐：{0}", hn.SelectSingleNode("//*[@class=/"diggnum/"]").InnerText));Write(sw, String.Format("标题：{0}", hn.SelectSingleNode("//*[@class=/"titlelnk/"]").InnerText));Write(sw, String.Format("介绍：{0}", hn.SelectSingleNode("//*[@class=/"post_item_summary/"]").InnerText));Write(sw, String.Format("信息：{0}", hn.SelectSingleNode("//*[@class=/"post_item_foot/"]").InnerText));Write(sw, "----------------------------------------");}sw.Close();Console.ReadLine();}static void Write(StreamWriter writer, string str){Console.WriteLine(str);writer.WriteLine(str);}}}