我试图替换这个可怕的正则表达式集合,该集合当前用于清理格式不正确的HTML块,并偶然发现了C#的HTML Agility Pack。它看起来非常强大,但我找不到如何使用该包的示例,我认为这是其中包含的所需功能。我确定我是个白痴,在文档中找不到合适的方法。
让我解释一下...说我有以下html:
<p class="someclass">
<font size="3">
<font face="Times New Roman">
this is some text
<a href="somepage.html">Some link</a>
</font>
</font>
</p>
我想要的样子:
<p>
this is some text
<a href="somepage.html">Some link</a>
</p>
当我使用HtmlNode.Remove()方法时,它将删除该节点及其所有子节点。有没有办法删除保留子节点的节点?
在HtmlNode上,RemoveChild方法有这个重载:
public HtmlNode RemoveChild(HtmlNode oldChild, bool keepGrandChildren);
所以这就是你要做的:
HtmlDocument doc = new HtmlDocument();
doc.Load("yourfile.htm");
foreach (HtmlNode font in doc.DocumentNode.SelectNodes("//font"))
{
font.ParentNode.RemoveChild(font, true);
}
编辑:看起来像替换w / keepGrandChildren选项没有按预期工作,所以这是一个替代实现:
public static HtmlNode RemoveChild(HtmlNode parent, HtmlNode oldChild, bool keepGrandChildren)
{
if (oldChild == null)
throw new ArgumentNullException("oldChild");
if (oldChild.HasChildNodes && keepGrandChildren)
{
HtmlNode prev = oldChild.PreviousSibling;
List<HtmlNode> nodes = new List<HtmlNode>(oldChild.ChildNodes.Cast<HtmlNode>());
nodes.Sort(new StreamPositionComparer());
foreach (HtmlNode grandchild in nodes)
{
parent.InsertAfter(grandchild, prev);
}
}
parent.RemoveChild(oldChild);
return oldChild;
}
// this helper class allows to sort nodes using their position in the file.
private class StreamPositionComparer : IComparer<HtmlNode>
{
int IComparer<HtmlNode>.Compare(HtmlNode x, HtmlNode y)
{
return y.StreamPosition.CompareTo(x.StreamPosition);
}
}
您可以尝试使用AngleSharp 。
var parser = new HtmlParser();
var document = parser.Parse(html);
using (var writer = new StringWriter())
{
document.ToHtml(writer, new PrettyMarkupFormatter());
return writer.ToString();
}