如何在HTML + HTMLAgilitypack中获取下2个节点 [英] How to get next 2 nodes in HTML + HTMLAgilitypack

问题描述

我在下面的HTML代码中有一个表格:

I have a table in the HTML code below:

<table style="padding: 0px; border-collapse: collapse;">
    <tr>
        <td><h3>My Regional Financial Office</h3></td>
    </tr>
    <tr>
        <td>&#160;</td>
    </tr>
    <tr>
        <td><h3>My Address</h3></td>
    </tr>
    <tr>
        <td>000 Test Ave S Ste 000</td>
    </tr>
    <tr>
        <td>Golden Valley, MN 00000</td>
    </tr>
    <tr>
        <td><a href="javascript:submitForm('0000','0000000');">Get Directions</a></td>
    </tr>
    <tr>
        <td>&#160;</td>
    </tr>
</table>

在包含文本我的地址"的表格行之后，如何获取下2个<tr>标记的内部文本?

How can I get the inner text of the next 2 <tr> tags after the tablerow containing the text "My Address?"

推荐答案

您可以使用以下XPath:

You can use following XPath :

var htmlDoc = new HtmlDocument();
htmlDoc.LoadHtml(html);
var tdOfInterests = 
        htmlDoc.DocumentNode
               .SelectNodes("//tr[td/h3[.='My Address']]/following-sibling::tr[position() <= 2]/td");
foreach (HtmlNode td in tdOfInterests)
{
    //given html input in question following code will print following 2 lines:
    //000 Test Ave S Ste 000
    //Golden Valley, MN 00000
    Console.WriteLine(td.InnerText);
}

上述XPath的关键是将following-sibling与position()过滤器一起使用.

The key of above XPath is using following-sibling with position() filter.

更新:

有关此答案中使用的XPath的一些说明:

A bit explanation about the XPath used in this answer :

//tr[td/h3[.='My Address']]

在上面选择具有以下内容的<tr>元素:

above part select <tr> element that has :

具有子<h3>元素且值等于的
• 子<td>元素 我的地址"

• child <td> element that has child <h3> element with value equals 'My Address'

/following-sibling::tr[position() <= 2]

下一个部分从当前<tr>元素(由上一个XPath部分选择的位置)中选择位置为<= 2的以下<tr>元素

/td

从当前<tr>元素中最后选择子<td>元素

the last part select child <td> element from current <tr> element

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