Question

我试图抓住＆＃34; href＆＃34;的价值。代码是这样的：

          <div class="s_newsbox" style="font-size:12px; vertical-align:middle; overflow: hidden; float:left; margin:10px; margin-bottom:15px; height: 270px; width:280px; border-radius:6px; position:relative; text-align:center; padding:0px">
            <div style="background-color:#292929; background-color:rgba(0,0,0,0.8); padding:5px; padding-left:2px; padding-right:10px; width:100%; position:absolute; top:0; left:0;"><b>Samsung nx30 + zoom kit 18/55</b>
            </div>
            <a href="vendo.php?t=1395911">
              <img style="width:100%; height:100%" src="http://img1.juzaphoto.com/shared_files/uploads_mercatino/sell_1395911_small.jpg" alt="">
              <br></a>
            <div style="line-height:150%; background-color:#292929; background-color:rgba(0,0,0,0.8); padding:5px; position:absolute; bottom:0; left:0; margin-left:auto; width:100%; text-align:left">Venditore: 
              <a href="me.php?l=it&amp;p=45923"><b>Pierobob</b></a>  
              <br> Prezzo: <b>350 &euro;</b>  
              <br> Zona: <b>Bologna</b>  
              <br> 
              <a href="vendo.php?t=1395911">Leggi annuncio</a> (8 visite)
              <br>
            </div>
          </div>

我想做的是：

           var list = page.DocumentNode.SelectNodes("//div[@class='s_newsbox']");
           foreach (var obj in list)
            {
              var url = obj.SelectSingleNode(".//a").Attributes["href"].Value;

我想抓住价值＆＃39; vendo.php？t = 1395911＆＃39;但我获得了另一条线的href值，该线没有父级div与该类＆＃39; s_newsbox＆＃39;

我做错了什么？

谢谢！

Answer 1

只要您不需要s_newsbox div中的任何其他节点，就可以使用更准确的xpath过滤掉相关对象。

       var list = page.DocumentNode.SelectNodes("//div[@class='s_newsbox']/a[string-length(@href)>0]");
       foreach (var obj in list)
        {
          var url = obj.SelectSingleNode(".").Attributes["href"].Value;

获得＆＃39; href＆＃39;的价值在C＃中的HTMLAgilityPack中的div内部

1 个答案: