Question

I’m building an application that needs to run through an XML feed but I’m having a little trouble with getting certain elements.

I’m using the Twitter feed and want to run through all the <item> elements. I can connect fine and get the content from the feed but I can’t figure out how to select only the item elements when I’m loopuing through reader.Read();.

Thanks for your help!

Answer 1

The easiest way to do that is to use XPath. Example to follow.

 string xml = @'<?xml version=''1.0'' encoding=''UTF-8''?> <rss version=''2.0''>     <channel>     <title>Twitter public timeline</title>     <link>http://twitter.com/public_timeline</link>     <description>Twitter updates from everyone!</description>     <language>en-us</language>     <ttl>40</ttl>      <item>       <title>yasu_kobayashi: rTwT: @junm : yayaya</title>       <description>yasu_kobayashi: rTwT: @junm : yayaya</description>       <pubDate>Tue, 28 Oct 2008 12:04:48 +0000</pubDate>       <guid>http://twitter.com/yasu_kobayashi/statuses/978829930</guid>       <link>http://twitter.com/yasu_kobayashi/statuses/978829930</link>      </item><item>       <title>FreeGroup: WikiFortio - foobar http://tinyurl.com/5gvttf</title>       <description>FreeGroup: WikiFortio - foobar       http://tinyurl.com/5gvttf</description>       <pubDate>Tue, 28 Oct 2008 12:04:47 +0000</pubDate>       <guid>http://twitter.com/FreeGroup/statuses/978829929</guid>       <link>http://twitter.com/FreeGroup/statuses/978829929</link>      </item></channel></rss>         ';             XPathDocument doc = new XPathDocument(new StringReader(xml));             XPathNavigator nav = doc.CreateNavigator();              // Compile a standard XPath expression              XPathExpression expr;             expr = nav.Compile('/rss/channel/item');             XPathNodeIterator iterator = nav.Select(expr);              // Iterate on the node set              try             {                 while (iterator.MoveNext())                 {                     XPathNavigator nav2 = iterator.Current.Clone();                     nav2.MoveToChild('title','');                     Console.WriteLine(nav2.Value);                     nav2.MoveToParent();                     nav2.MoveToChild('pubDate','');                     Console.WriteLine(nav2.Value);                  }             }             catch (Exception ex)             {                 Console.WriteLine(ex.Message);             }             Console.ReadKey(); 

And this is jan’s approach working

        XmlDocument doc2 = new XmlDocument();         doc2.LoadXml(xml);         XmlNode root = doc2.DocumentElement;          foreach (XmlNode item in root.SelectNodes(@'/rss/channel/item'))         {             Console.WriteLine(item.SelectSingleNode('title').FirstChild.Value);             Console.WriteLine(item.SelectSingleNode('pubDate').FirstChild.Value);         }