我想使用Fizzler在C#中解析一個網站。我的目標是獲得這個元素: /html/body/form/div [3]/div/div/div/div/div/table/tbody/tr [18]/td [2]/span(FireBug XPath) 。如何列出所有包含SPAN的TD元素?
問題是TR和TD號碼不固定。我只知道,我總是需要的最後一個跨度,在過去的TD,在過去的TR :)
我這個嘗試,但我得到的是NULL:
HtmlWeb document = new HtmlWeb();
HtmlAgilityPack.HtmlDocument doc = document.Load("http://websiteaddress.com/site-name.html");
HtmlNodeCollection tableDatas = doc.DocumentNode.SelectNodes("//table/tbody/tr/td/span").Last();
這是表我試圖解析。我只需要在最後一行的最後一個td中的最後一個跨度的內容。
<table id="ctl00_WebPartManager1_blablabla_ctl00_tblRates" cellspacing="5" cellpadding="5" rules="all" border="1" style="width:100%;">
<tr>
<th></th><th><span>USD</span></th>
</tr><tr>
<th></th><th><span>USA $</span></th>
</tr><tr>
<th></th><th><span>1</span></th>
</tr><tr>
<td><span>2014. 03. 03.</span></td><td><span>227,31 </span></td>
</tr><tr>
<td><span>2014. 03. 04.</span></td><td><span>226,79 </span></td>
</tr><tr>
<td><span>2014. 03. 05.</span></td><td><span>225,66 </span></td>
</tr><tr>
<td><span>2014. 03. 06.</span></td><td><span>225,03 </span></td>
</tr><tr>
<td><span>2014. 03. 07.</span></td><td><span>223,14 </span></td>
</tr><tr>
<td><span>2014. 03. 10.</span></td><td><span>224,63 </span></td>
</tr><tr>
<td><span>2014. 03. 11.</span></td><td><span>226,06 </span></td>
</tr><tr>
<td><span>2014. 03. 12.</span></td><td><span>226,53 </span></td>
</tr><tr>
<td><span>2014. 03. 13.</span></td><td><span>223,63 </span></td>
</tr><tr>
<td><span>2014. 03. 14.</span></td><td><span>225,74 </span></td>
</tr><tr>
<td><span>2014. 03. 17.</span></td><td><span>224,67 </span></td>
</tr><tr>
<td><span>2014. 03. 18.</span></td><td><span>224,65 </span></td>
</tr><tr>
<td><span>2014. 03. 19.</span></td><td><span>223,26 </span></td>
</tr><tr>
<td><span>2014. 03. 20.</span></td><td><span>225,94 </span></td>
</tr><tr>
<td><span>2014. 03. 21.</span></td><td><span>226,25 </span></td>
</tr>
</table>
這是結果我從document.load get()方法(它有點搞砸了...):
<table id="ctl00_WebPartManager1_blablabla_ctl00_tblRates" cellspacing="5" cellpadding="5" rules="all" border="1" style="width:100%;">
<tr>
<th><th><span>USD</span>
<tr>
<th><th><span>USA $</span>
<tr>
<th><th><span>1</span>
<tr>
<td><span>2014. 03. 03.</span><td><span>227,31 </span>
<tr>
<td><span>2014. 03. 04.</span><td><span>226,79 </span>
<tr>
<td><span>2014. 03. 05.</span><td><span>225,66 </span>
<tr>
<td><span>2014. 03. 06.</span><td><span>225,03 </span>
<tr>
<td><span>2014. 03. 07.</span><td><span>223,14 </span>
<tr>
<td><span>2014. 03. 10.</span><td><span>224,63 </span>
<tr>
<td><span>2014. 03. 11.</span><td><span>226,06 </span>
<tr>
<td><span>2014. 03. 12.</span><td><span>226,53 </span>
<tr>
<td><span>2014. 03. 13.</span><td><span>223,63 </span>
<tr>
<td><span>2014. 03. 14.</span><td><span>225,74 </span>
<tr>
<td><span>2014. 03. 17.</span><td><span>224,67 </span>
<tr>
<td><span>2014. 03. 18.</span><td><span>224,65 </span>
<tr>
<td><span>2014. 03. 19.</span><td><span>223,26 </span>
<tr>
<td><span>2014. 03. 20.</span><td><span>225,94 </span>
<tr>
<td><span>2014. 03. 21.</span><td><span>226,25 </span>
</td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></td></td></tr></th></th></tr></th></th></tr></th></th></tr></table>
有人能幫助我,好嗎?
非常感謝!
這是你的問題的一部分? http://stackoverflow.com/questions/18241029/why-does-my-xpath-query-scraping-html-tables-only-work-in-firebug-but-not-the –
那麼,看看你提供的輸入: 是的。 –