使用HTML Agility Pack選擇下一個元素

Question

使用HTML Agility Pack選擇下一個元素

c# html html-agility-pack

題

我正在使用HTML Agility Pack並在class="fileHeader"中搜索div其中包含子h4元素中的"RelayClinical Patient Education with Animations Install zip" 。一旦找到，我想捕獲該特定塊的錨標記內的"href"屬性。我怎麼才能得到它？

HTML來源

<div class="fileHeader" id="fileHeader_7311111">
    <h4 class="collapsed">RelayClinical Patient Education with Animations Install zip</h4>
    <div class="defaultMethod">
        <a class="buttonGrey" href="https://mckc-esd.subscribenet.com/cgi-bin/download?rid=2511740931&amp;rp=DTM20130905162949MzcyODIwNjM0" title="Clicking this link will open a new window." rel="noreferrer">
            HTTPS Download
        </a>
    </div>
</div>

碼

<div class="fileHeader" id="fileHeader_7311111">
    <h4 class="collapsed">RelayClinical Patient Education with Animations Install zip</h4>
    <div class="defaultMethod">
        <a class="buttonGrey" href="https://mckc-esd.subscribenet.com/cgi-bin/download?rid=2511740931&amp;rp=DTM20130905162949MzcyODIwNjM0" title="Clicking this link will open a new window." rel="noreferrer">
            HTTPS Download
        </a>
    </div>
</div>

bradley32110

在 Stack Overflow 上查看更多

Accepted Answer

而不是選擇h4元素，直接選擇a元素。然後你可以獲取href屬性。

var h4Text = "RelayClinical Patient Education with Animations Install zip";
var xpath = String.Format(
    "//div[@class='fileHeader' and h4='{0}']/div[@class='defaultMethod']/a",
    h4Text
);
var anchor = doc.DocumentNode.SelectSingleNode(xpath);
if (anchor != null)
{
    var attr = anchor.GetAttributeValue("href", null);
    // do stuff with attr
}

使用HTML Agility Pack選擇下一個元素

題

一般承認的答案

Performance

Expression Evaluator