将网页转换为纯文本..？

发布于 2024-11-19 03:35:36 字数 930 浏览 2 评论 0原文

我正在尝试将网页转换为纯文本。但如果我遇到该表，我也会得到 td 和 tr 标签。如果我替换这些表格标签，那么我将无法获取某些内容。

这是我的代码，

string s = Regex.Replace(htmldoc, "<script.*?</script>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<!--.*?-->", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<style.*?style>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<a.*?a>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<img.*?img>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<table.*?table>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(s);
s = doc.DocumentNode.SelectSingleNode("//body").InnerText.Trim();

请检查它并告诉我如何在不获取 td 和 tr 标签的情况下从表中获取内容。

原文

I am trying to convert the webpage into a plain text. But if I encountered the table I am getting td and tr tags too. If I replace those table tags then I can't get some of the content.

Here is my code

string s = Regex.Replace(htmldoc, "<script.*?</script>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<!--.*?-->", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<style.*?style>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<a.*?a>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<img.*?img>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
s = Regex.Replace(s, "<table.*?table>", "", RegexOptions.Singleline | RegexOptions.IgnoreCase);
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(s);
s = doc.DocumentNode.SelectSingleNode("//body").InnerText.Trim();

Please check it and tell me how can I get the contents from table without getting td and tr tags.

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浅笑轻吟梦一曲 2024-11-26 03:35:36

如果您使用 HTML Agility pack 来解析表格，则无需使用正则表达式删除 HTML 标签。这里有一些使用 HTML Agility pack 解析表的好例子。例如：HTML 敏捷包 - 解析表

回复收藏 0 原文

錯遇了你 2024-11-26 03:35:36

您可以使用正文的 InnerText：

string html = @"
<html>
    <title>title</title>
    <body>
           <h1> The wheel.</h1>
           Stop reinventing the wheel ! Use powerful APIs 
           for manipulating html docs !
           <h3> I am fine </h3>
           <img src=""da_wheel_in_my_mind.png""/>
    </body>
</html>";

HtmlDocument doc = new HtmlDocument();
doc.LoadHtml(html);
string text = doc.DocumentNode.SelectSingleNode("//body").InnerText;

接下来，您可能想要折叠空格和新行：

text = Regex.Replace(text, @"\s+", " ").Trim();

但是请注意，虽然在这种情况下有效，但诸如 hello world 之类的标记 或 helloworld 将由 InnerText 转换为 helloworld - 删除标签。解决这个问题很困难，因为显示通常由 CSS 决定，而不仅仅是由标记决定。

You can use the body's InnerText:

string html = @"
<html>
    <title>title</title>
    <body>
           <h1> The wheel.</h1>
           Stop reinventing the wheel ! Use powerful APIs 
           for manipulating html docs !
           <h3> I am fine </h3>
           <img src=""da_wheel_in_my_mind.png""/>
    </body>
</html>";

HtmlDocument doc = new HtmlDocument();
doc.LoadHtml(html);
string text = doc.DocumentNode.SelectSingleNode("//body").InnerText;

Next, you may want to collapse spaces and new lines:

text = Regex.Replace(text, @"\s+", " ").Trim();

Note, however, that while it is working in this case, markup such as hello<br>world or hello<i>world</i> will be converted by InnerText to helloworld - removing the tags. It is difficult to solve that issue, as display is often determined by the CSS, not just by the markup.

回复收藏 0 原文

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