在WinRT的HtmlAgilityPack中使用ReplaceChild

Question

I'm trying to convert HTML to markdown in a windows store app. The following code works in a .NET 4 MVC project

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

foreach (var x in doc.DocumentNode.SelectNodes("//strong"))
{
    x.ParentNode.ReplaceChild(
            HtmlAgilityPack.HtmlNode.CreateNode("**" + x.InnerHtml + "**"),
    x);
}

SelectNodes is not available in the WinRT build so when porting the code I replaced this with Descendants.

foreach (var x in doc.DocumentNode.Descendants("//strong"))
{
    x.ParentNode.ReplaceChild(
            HtmlAgilityPack.HtmlNode.CreateNode("**" + x.InnerHtml + "**"),
    x);
}

This code leaves the HtmlDocument unchanged. Am I doing something wrong, or is this a bug?

Answer 1

Descendants expects an element name, not an XPath , therefore your code doesn't return any element and document remains unchanged.

You need to remove slashes :

foreach (var x in doc.DocumentNode.Descendants("strong"))