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As HtmlAgilityPack is yet not supported in windows phone 8.1,referencing manually in the project was a trick solution. But this is not the only problem. I could use XPath for my past project to select nodes. Now I can see that HtmlDocumentNode.SelectNode() function is no more(because of version compatibility may be).

what I used in my past project was similar to this

HtmlNode parent = document.DocumentNode.SelectSingleNode("//ul[@class='songs-list1']");
HtmlNodeCollection x = parent.ChildNodes;

I searched over stackoverflow and google and got an Idea that It's still possible to select nodes using Linq.

I'm seeking for a block of code which will work like SelectNodes, SelectNode.

Loading the HtmlDocument asynchronously would be appreciated.

Marius Bancila
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Faysal Ahmed
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2 Answers2

4

If you meant to translate your current code which using XPath to be using LINQ, then this will do :

HtmlNode parent = document.DocumentNode
                          .Descendants("ul")
                          .FirstOrDefault(o => o.GetAttributeValue("class", "") 
                                                   == "songs-list1")
HtmlNodeCollection x = parent.ChildNodes;

But if you expect to find methods that accept XPath in HtmlAgilityPack version for Windows Phone 8.1 universal apps or Windows RT ("I'm seeking for a block of code which will work like SelectNodes, SelectNode"), you better don't : HtmlAgilityPack & Windows 8 Metro Apps (answer by the author of HAP).

Community
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har07
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  • What is `null`? `parent` is null? Try to save your `HtmlDocument` and see if it actually has `
      ` with such `class` attribute.
     – har07 Aug 12 '14 at 11:54
  • yes parent is null. I'm sure about about the node and it's class name. – Faysal Ahmed Aug 12 '14 at 12:10
  • Please check/debug. Don't guess coz I'm also sure about this code, even worked fine when I tested using simple HTML containing `
      `. Or post your HTML so we can confirm whether this code works or not.
     – har07 Aug 12 '14 at 12:13
  • okay, basically I'm trying to parse this website http://www.songspk.name/ and trying to get the list of album updates portion. please check it yourself. – Faysal Ahmed Aug 12 '14 at 12:16
  • just for your reference I used this 2 lines of code to get the "HTML DOCUMENT" HtmlDocument document = new HtmlDocument(); document.LoadHtml(latestNewsUrl); – Faysal Ahmed Aug 12 '14 at 12:18
  • okay, that's need to be fixed. `LoadHtml()` accept html string (`....`) instead of URL. Check if `HtmlWeb` is available for you, check discussion in comment for how to use `HtmlWeb` : http://stackoverflow.com/a/23190899/2998271 – har07 Aug 12 '14 at 12:47
  • Now I get the following error "Type Access Exception " when I used this two lines of code. HtmlWeb web = new HtmlWeb(); HtmlDocument document = await web.LoadFromWebAsync(latesturl); – Faysal Ahmed Aug 13 '14 at 18:02
1

You can do it using the Element/s method:

        HtmlDocument doc = new HtmlDocument();
        doc.LoadHtml(htmlString);
        var h6Nodes = from h6element in doc.DocumentNode.Element("body").Element("center").Elements("h6")
                      where h6element.Attributes["class"].Value.Equals("songs-list")                      
                      select h6element;

This is assuming you have something like

string htmlString = @"<html>
<body>
<center>
<h6>Hello  </h6>
<h6>World!   </h6>
<h6 class=""songs-list"">
Insert that one song here
</h6>
</center>
</body>
</html>"

and that will get the <h6> node with class songs-list.

Tyress
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