vb.net HtmlAgilityPack 获取页面标题和 H1 标签
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HtmlAgilityPack getting page title and H1 tags
提问by StealthRT
Hey all i am trying to get the page title and H1 tags from a webpage by doing the following
大家好，我正在尝试通过执行以下操作从网页中获取页面标题和 H1 标签
doc.LoadHtml(htmlSourceCode)
txtTitle.Text = doc.GetElementsByTagName("title").InnerText()
txtH1.Text = doc.GetElementsByTagName("H1").InnerText()
For Each channel In doc.DocumentNode.SelectNodes(".//meta[@name='description']")
txtDescription.Text = channel.Attributes("content").Value
Next
The only code above that works is the txtDescription part. Both the title and H1 do not. What type of syntax do i need to use in order to get those 2 tags?
上面唯一有效的代码是 txtDescription 部分。标题和 H1 都没有。为了获得这两个标签，我需要使用什么类型的语法？
The html code looks like this:
html 代码如下所示：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="content-type" content="text/html;charset=utf-8" /><title>
The title text is here!
</title><link rel="icon" type="image/x-icon" href="http://www.zzzz.com/favicon.ico" />
....
<div class="main-content">
<div class="block-info">
<div class="container">
<div class="article">
<h1>
This is the H1 tag with the text!</h1>
<p>As the 2nd held tru
回答by jessehouwing
You can use doc.DocumentNode.SelectSingleNode("//head/title")and doc.DocumentNode.SelectNodes("//body//h1").
您可以使用doc.DocumentNode.SelectSingleNode("//head/title")和doc.DocumentNode.SelectNodes("//body//h1")。
Or doc.DocumentNode.Descendants("title").SingleOrDefault()and doc.DocumentNode.Descendants("h1").
或doc.DocumentNode.Descendants("title").SingleOrDefault()和doc.DocumentNode.Descendants("h1")。
