Question

我尝试使用HtmlAgilityPack从头开始创建XHTMl文件。根据{{3}}中提供的建议，我尝试向其添加文档类型：

private static HtmlDocument createEmptyDoc()
{
    HtmlDocument titlePage = new HtmlDocument();

    titlePage.OptionOutputAsXml = true;
    titlePage.OptionCheckSyntax = true;

    titlePage.AddDoctype();

    var html = titlePage.CreateElement("html");
    titlePage.DocumentNode.AppendChild(html);

    return titlePage;
}

public static class HtmlDocumentExtensions
{
    public static void AddDoctype(this HtmlDocument doc)
    {
        var doctype = doc.DocumentNode.PrependChild(doc.CreateComment("<!doctype html  PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">"));
    }
}

但是，当我将此文档写入文件时，它看起来像这样：

<?xml version="1.0" encoding="iso-8859-1"?>
<!--type html  PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.d-->
<html />

doctype确实被视为注释，而某些字符被短划线取代。如何解决此问题并将文档类型原样写入文件？

编辑：为HtmlDocument添加了自定义扩展

Answer 1

        static void Main(string[] args)
        {
            string html = @"
<html>
<body>

<h1>My First Heading</h1>

<p>My first paragraph.</p>

<table>
    <tr>
        <td>A!!</td>
        <td>te2</td>
        <td>2!!</td>
        <td>te43</td>
        <td></td>
        <td> !!</td>
        <td>.!!</td>
        <td>te53</td>
        <td>te2</td>
        <td>texx</td>
    </tr>
</table>

<h4 class=""nikstyle_title""><a rel=""nofollow"" target=""_blank"" href=""http://www.niksalehi.com/ccount/click.php?ref=ZDNkM0xuQmxjbk5wWVc1MkxtTnZiUT09&id=117""><span class=""text-matn-title-bold-black"">my text</span></a></h4>

</body>
</html>";

            HtmlDocument doc = new HtmlDocument();
            doc.LoadHtml(html);

            var doctype = doc.DocumentNode.SelectSingleNode("/comment()[starts-with(.,'<!DOCTYPE')]");
            if (doctype == null)
                doctype = doc.DocumentNode.PrependChild(doc.CreateComment());

            doctype.InnerHtml = "<!DOCTYPE html>";

            string html2 = doc.DocumentNode.InnerHtml;

        }

其他问题中的代码为您提供了完成此操作的方法。这是完整的例子。

Answer 2

试试这个：

using HtmlAgilityPack;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            HtmlDocument doc = new HtmlDocument();
            HtmlNode docNode = HtmlNode.CreateNode("<html><head></head><body></body></html>");
            HtmlNode rootNode = HtmlNode.CreateNode("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">");
            doc.DocumentNode.AppendChild(rootNode);
            doc.DocumentNode.AppendChild(docNode);
            doc.Save("test.html");
        }
    }
}

使用HtmlAgilityPack的doctype问题

2 个答案: