Question

表中有多个Tbodies，我试图通过使用HTMLagilitypack解析它们。通常，下面的代码可以工作，但事实并非如此。现在它只打印第一个tbody并忽略第二个。

代码

var tableOffense =  doc.DocumentNode.SelectSingleNode("//table[@id='OFF']");
                var tbody = tableOffense.SelectNodes("tbody");
                foreach(var bodies in tbody)
                {
                    Console.WriteLine("id "+offender.offenderId +" "+ Utilities.RemoveHtmlCharacters(bodies.InnerText));
                }

HTML

<table id="OFF" class="centerTable" cols="2" style="margin-top:0; width:100%;" cellpadding="0" cellspacing="0">   
<tbody>
<!-- %%$SPLIT  -->
  <tr>         <th id="offenseCodeColHdr" scope="row" style="width:25%;" class="uline">Offense Code</th>         <td headers="offenseCodeColHdr" class="uline">288(a)</td>          </tr>       <tr>         <th id="descriptionColHdr" scope="row" style="width:25%;" class="uline">Description</th>         <td headers="descriptionColHdr" class="uline">LEWD OR LASCIVIOUS ACTS WITH A CHILD UNDER 14 YEARS OF AGE</td>             </tr>           <tr>         <th id="lastConvictionColHdr" scope="row" style="width:25%;" class="uline">Year of Last Conviction</th>         <td headers="lastConvictionColHdr" class="uline">&nbsp;</td>       </tr>       <tr>          <th id="lastReleaseColHdr" scope="row" style="width:25%;" class="uline">Year of Last Release</th>         <td headers="lastReleaseColHdr" class="uline">&nbsp;</td>       </tr>
  <tr><th colspan="2"><hr style="height:2px;background-color:#000;"></th></tr>         </tbody>
<!-- %%$SPLIT  -->
  <tbody><tr>         <th id="offenseCodeColHdr" scope="row" style="width:25%;" class="uline">Offense Code</th>         <td headers="offenseCodeColHdr" class="uline">261(a)(2)</td>            </tr>       <tr>         <th id="descriptionColHdr" scope="row" style="width:25%;" class="uline">Description</th>         <td headers="descriptionColHdr" class="uline">RAPE BY FORCE OR FEAR</td>          </tr>           <tr>         <th id="lastConvictionColHdr" scope="row" style="width:25%;" class="uline">Year of Last Conviction</th>         <td headers="lastConvictionColHdr" class="uline">&nbsp;</td>       </tr>       <tr>          <th id="lastReleaseColHdr" scope="row" style="width:25%;" class="uline">Year of Last Release</th>         <td headers="lastReleaseColHdr" class="uline">&nbsp;</td>       </tr>
  <tr><th colspan="2"><hr style="height:2px;background-color:#000;"></th></tr>         </tbody>
<!-- %%$SPLIT  -->
</table>

我自己只打印了tableOffense节点，以确保第二个tbody在加载时存在并且确实存在。

问题为什么代码只打印出第一个tbody而不是两个？

Answer 1

我还没弄清楚为什么你的代码只给你一个tbody，但我可以建议一个替代解决方案来选择你所有的<tbody>元素吗？

就个人而言，我会使用XPAth，只需一次选择所有tbody元素，而无需额外SelectNodes()：

var tbody = doc.DocumentNode.SelectNodes("//table[@id='OFF']//tbody");
foreach (var elem in tbody)
{
    //Dump only works in LinqPad
    elem.InnerText.Dump();
}

编辑：

以下代码（您的代码）也会产生相同的结果

var tableOffense =  doc.DocumentNode.SelectSingleNode("//table[@id='OFF']");
var tbody = tableOffense.SelectNodes("//tbody");

HtmlAgilityPack表中的多个tbody

1 个答案: