C# 使用HtmlAgilityPack 抓取 网站链接

    今天在找电视剧下载链接的时候，找了一个整部剧的下载地址，但是有40多集，链接地址较长且不好复制，于是就想到了HtmlAgilityPack抓取的方式。

先看实现效果：

使用到的NUGET包： HtmlAgilityPack、HttpCode.Core

请求到网址获取整个网址

   static void Main(string[] args)
        { 
            HttpHelpers httpHelpers = new HttpHelpers();
            HttpItems items = new HttpItems();
            items.Url = "https://www.123455.com/videodetails/2222.html";//请求地址
            items.Method = "Get";//请求方式 post 
            HttpResults hr = httpHelpers.GetHtml(items);

            JX(hr.Html); 
        } 

解析获取到的网址

/// <summary>
        /// 解析XML
        /// </summary>
        /// <param name="htmlCode"></param>
        public static void JX(string htmlCode)
        {

            //HtmlAgilityPack
            //源码地址：https://html-agility-pack.net/?z=codeplex 
            //下载地址2：https://codeplexarchive.blob.core.windows.net/archive/projects/htmlagilitypack/htmlagilitypack.zip
            string path = System.AppDomain.CurrentDomain.BaseDirectory;
            var filname = "抓取文件.txt";

            HtmlDocument document = new HtmlDocument(); 
            document.LoadHtml(htmlCode);
            HtmlNode rootNode = document.DocumentNode;
            //categoryNodeList 具有相同类型的节点的集合                //标签@属性='属性名称'
            HtmlNodeCollection categoryNodeList = rootNode.SelectNodes("//div[@id='content']//li[@id='li3_0']//span[@id='s3p0']");
            //也可以通过Xpath路径的形式获取 Xpath路径可以使用HAPExplorer.exe（通过上面的源码地址可以下载并生成工具）
            //HtmlNodeCollection categoryNodeList = rootNode.SelectNodes("/html[1]/head[1]/div[2]/div[6]/ul[1]");

            foreach (var item in categoryNodeList)
            {
                var sapn = item.InnerHtml.Trim();
                var herf = sapn.Split('"')[3];
                WriteMessage(path + filname, herf);
            } 
        }

输出到文本文件

        /// <summary>
        /// 输出指定信息到文本文件
        /// </summary>
        /// <param name="path">文本文件路径</param>
        /// <param name="msg">输出信息</param>
        public static void WriteMessage(string path, string msg)
        {
            using (FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))
            {
                using (StreamWriter sw = new StreamWriter(fs))
                {
                    sw.BaseStream.Seek(0, SeekOrigin.End);
                    sw.WriteLine("{0}
", msg, DateTime.Now);
                    sw.Flush();
                }
            }
        }