围绕现有节点与敏捷性包的另一个节点 [英] Surround existing node with another node with Agility Pack

问题描述

您会如何去所有的表，围绕着一个< D​​IV CLASS =溢出>< / DIV> 节点？这显然​​不做到这一点：

How would you go about surrounding all tables with a <div class="overflow"></div> node? This apparently does not do it:

if (oldElement.Name == "table")
{
    HtmlDocument doc = new HtmlDocument();
    HtmlNode newElement = doc.CreateElement("div");
    newElement.SetAttributeValue("class", "overflow");
    newElement.AppendChild(oldElement);
    oldElement.ParentNode.ReplaceChild(newElement, oldElement);
}

什么也没有发生的表，当我尝试代码。但是，如果我使用：

Nothing happens to the tables when I try that code. But if i use:

if (oldElement.Name == "table")
{
    oldElement.Remove();
}

所有的表确实去除，所以我敢肯定我是访问正确的节点。

All tables are indeed removed, so I'm sure that i'm accessing the correct nodes.

推荐答案

这可能是有点难看，但你可以只编辑oldElement.ParentNode的innerHTML属性像这样的节点：

It might be a little bit ugly, but you could just edit the InnerHtml attribute of the oldElement.ParentNode node like so:

if (oldElement.Name == "table")
{
    oldElement.ParentNode.InnerHtml = "\r\n<div class=\"overflow\">\r\n"
        + oldElement.OuterHtml +
        "\r\n</div>\r\n";
}

这也似乎并不像您可以编辑oldElement的OuterHtml属性（这就是为什么你必须首先获得ParentNode）。该HtmlAgilityPack说，你可以获取/设置OuterHtml，但VS2010告诉我这是一个只读属性。

It also doesn't seem like you could edit the OuterHtml attribute of oldElement (which is why you have to get the ParentNode first). The HtmlAgilityPack says you can get/set OuterHtml, but VS2010 was telling me it's a read-only property.

修改

我在玩弄一些代码摸不着头脑，看到 oldElement.ParentNode 变成了< DIV> 在节点的appendChild（）被调用。我找到了解决的办法是让另一个 HtmlNode 在IF块开始举办父，然后调用的replaceChild（）末该节点上：

I was playing around with some code to figure this out and saw that oldElement.ParentNode becomes the <div> node after AppendChild() is called. The solution I found is to make another HtmlNode at the start of the if block to hold the parent, and then calling ReplaceChild() on that node at the end:

if (oldElement.Name == "table")
{
    HtmlNode theParent = oldElement.ParentNode;

    HtmlDocument doc = new HtmlDocument();
    HtmlNode newElement = doc.CreateElement("div");
    newElement.SetAttributeValue("class", "overflow");
    newElement.AppendChild(oldElement);

    theParent.ReplaceChild(newElement, oldElement);
}

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