HTMLAgilityPack don't preserves original empty tags

问题

If i have some empty tags like this

<td  width="15px"/>

Agility pack fixes them to be like

<td  width="15px"></td>

Is anything possible to do to override this behavior ?

回答1:

Try this before saving:

if (HtmlNode.ElementsFlags.ContainsKey("td"))
{
    HtmlNode.ElementsFlags["td"] = HtmlElementFlag.Empty | HtmlElementFlag.Closed;
}
else
{
    HtmlNode.ElementsFlags.Add("td", HtmlElementFlag.Empty | HtmlElementFlag.Closed);
}

This changes the behavior for all td elements which may not be what you want. I don't know of a way to accomplish this per-node.

回答2:

Set the OptionWriteEmptyNodes property to true on your HtmlDocument.

回答3:

While @Corbin March's answer doesn't work as desired, it's the only one I've found that comes close. The problem is that HAP still does some additional fixup that makes this a problem.

From the original code:

<td  width="15px"/>

By set the ElementFlags as above the closing element tag indeed is not created, however the original trailing "/" is removed. This could be a problem depending on your scenario, it was for me. The original fragment becomes:

<td  width="15px">

来源：https://stackoverflow.com/questions/4389638/htmlagilitypack-dont-preserves-original-empty-tags