HtmlAgilityPack找不到特定的td

我需要使用XPath從表中抽取一個特定td的值，但代碼始終返回null。我怎樣才能解決這個問題？HtmlAgilityPack找不到特定的td

var location = GetLocation(document.Result.DocumentNode.SelectSingleNode("//*[@id='detailTabTable']/tbody/tr[3]/td[2]"));

和代碼

private string GetLocation(HtmlNode h) 
     { 
      try 
      { 
       string location = null; 
       if (h == null) 
       { 
        location = "N/A"; 
       } 
       else 
       { 
        location = h.InnerText; 
        location = location.Substring(0, location.IndexOf(",", StringComparison.InvariantCulture)); 
       } 
       return location; 
      } 
      catch (Exception ex) 
      { 
       log.ErrorFormat("Error in Link Data Repository {0} in Parse Links {1}", ex.Message, ex.StackTrace); 
       throw new Exception(ex.Message); 
      } 
     }

而且簡單的小表：

 <table id="detailTabTable" width="99%" border="0" cellspacing="0" cellpadding="0"> 
      <tr> 
       <td class="detailTabContentLt">Current List Price:</td> 
       <td class="detailTabContentPriceRt"> 
        <span class="aiDetailCurrentPrice">AED 6,600,000</span> 
       </td> 
      </tr> 
      <tr> 
       <td class="detailTabContentLt" style="white-space: nowrap;">Plot size (Sq. Ft.):</td> 
       <td class="detailTabContentRt">N/A</td> 
      </tr> 
      <tr> 
       <td class="detailTabContentLt" valign="top">Locality</td> 
       <td class="detailTabContentRt">Dubai, Dubai</td> 
      </tr> 
      <tr> 
       <td colspan="2"></td> 
      </tr> 
     </table>

來源

2015-02-24 andrey.shedko

您的示例HTML沒有在XPath中提到的tbody ... – 2015-02-24 06:51:27

這個Xpath我是從Chrome開發者工具中自動獲得的。但是你是對的，我應該嘗試沒有這個標籤 – 2015-02-24 06:55:19

如果你從chrome得到這個XPath查詢，必須有另一個html代碼，而不是你告訴我們的。請更新您的html代碼，以便我們能夠幫助您！ – 2015-02-24 06:56:54

您可以使用fizzler和選擇的東西CSS方式:) http://blog.simontimms.com/2014/02/24/parsing-html-in-c-using-css-selectors/

來源

2015-02-24 08:03:50

我剛纔測試你的代碼。正如你在評論中提到的那樣從你的xpath表達式中刪除tbody一切正常。這工作正常我。

private static void htmlAgilityPackTest() 
{ 
    string html = " <table id=\"detailTabTable\" width=\"99%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\"><tr><td class=\"detailTabContentLt\">Current List Price:</td><td class=\"detailTabContentPriceRt\"><span class=\"aiDetailCurrentPrice\">AED 6,600,000</span></td> </tr><tr> <td class=\"detailTabContentLt\" style=\"white-space: nowrap;\">Plot size (Sq. Ft.):</td><td class=\"detailTabContentRt\">N/A</td></tr> <tr><td class=\"detailTabContentLt\" valign=\"top\">Locality</td> <td class=\"detailTabContentRt\">Dubai, Dubai</td> </tr> <tr><td colspan=\"2\"></td> </tr> </table>"; 
    HtmlAgilityPack.HtmlDocument document = new HtmlAgilityPack.HtmlDocument(); 
    document.LoadHtml(html); 

    var node = document.DocumentNode.SelectSingleNode("//*[@id='detailTabTable']/tr[3]/td[2]"); 
    string location = GetLocation(node); 
    Console.WriteLine("Location: " + location); 
}

如果我誤解了任何內容，請告訴我。

來源

2015-02-24 13:41:24

HtmlAgilityPack找不到特定的td

回答

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