CODEWITHSUNDEEP
c#.netwpfrss
user2835256
user2835256

Reputation: 415

WPF Exception "Root Element is Missing"

I have written code in WPF c# to get RSS Atom XML Feed but it gives an Exception that root element id missing. How to solve this can you please help me. My code is:

try
{

  string url = @"http://myweblink/newlink.xml";
  string username = "";
  string password = "";

  Uri uri = new Uri(url);
  HttpWebRequest rssFeed = (HttpWebRequest)WebRequest.Create(uri);
  rssFeed.Method = "GET";
  rssFeed.Credentials = new NetworkCredential(username, password);
  using (DataSet rssData = new DataSet())
  {
    //read the xml from the stream of the web request
    rssData.ReadXml(rssFeed.GetResponse().GetResponseStream());

    //loop through the rss items in the dataset 
    //and populate the list of rss feed items
    foreach (DataRow dataRow in rssData.Tables["item"].Rows)
    {
      newlistt.Add(new RssFeedItem
      {
        ChannelId = Convert.ToInt32(dataRow["channel_Id"]),
        Description = Convert.ToString(dataRow["description"]),
        ItemId = Convert.ToInt32(dataRow["item_Id"]),
        LinkURL = Convert.ToString(dataRow["link"]),
        PublishDate = Convert.ToDateTime(dataRow["pubDate"]),
        Title = Convert.ToString(dataRow["title"])
      });
    }
  }    
}

catch (Exception ee)
{
  MessageBox.Show(ee.Message);
}

Upvotes: 0

Views: 1247

Answers (1)

Mike Strobel
Mike Strobel

Reputation: 25623

Don't use DataSet; it is very old and not intended for general-purpose XML reading. I recommend using LINQ to XML. Something like this:

var feed = XDocument.Load(rssFeed.GetResponse().GetResponseStream());
var ns = feed.Root.Name.Namespace;
var items = (from e in feed.Root.Elements(ns + "item")
             select new RssFeedItem
                        {
                            ChannelId = (int?)e.Element(ns + "channel_Id") ?? -1,
                            Description = (string)e.Element(ns + "description"),
                            // ...
                        }).ToList();

Deal with missing values as you see fit.

Upvotes: 1

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