Syndication feed dropping without explination

Question

I'm working on a Windows 8 app in C#.  I'm pulling a RSS+XML feed that, based on results in Fiddler, are well formed.  Some times the code builds 30 data objects but most of the time it drops out at the "currentFeed = await client.RetrieveFeedAsync(uri);" without generating an error.  Any assistance is greatly appreciated.

        async void GetFeed()
        {
            try
            {
                SyndicationFeed currentFeed = null;
                Uri uri = new Uri("http://ivy.nowsprouting.com/lifebridgechristianchurch/podcast.php?pageID=39");
                SyndicationClient client = new SyndicationClient();
                client.BypassCacheOnRetrieve = true;
                currentFeed = await client.RetrieveFeedAsync(uri);
                var reader = currentFeed.GetXmlDocument(SyndicationFormat.Rss20);

                foreach (var content in currentFeed.Items)
                {
                    foreach (var link in content.Links)
                    {
                        AllItems.Add(new MessageDataItem(content.Id.ToString(), content.Authors.ToString(), content.Title.Text,currentFeed.Subtitle.Text, link.Uri.ToString(), content.NodeValue.ToUpperInvariant()));
                    }
                }
            }
            catch (Exception ex)
            {
                SyndicationErrorStatus status = SyndicationError.GetStatus(ex.HResult);
            }
        }

Answer 1

When you say it drops out, what does that mean?  Try removing that try/catch and see what happens.

---

Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects and unknown namespaces.

Answer 2

Thanks Matt.  I have run it with and without the try catch.  Initially my screen came back empty so I started walking the code in debug and when I first boot up it will build 30 records any iterations after that the code hits the "currentFeed = await client.RetrieveFeedAsync(uri);" line and returns to the calling method without executing the lines below it.

Answer 3

I'm running RTM bits and I have not been able to reproduce this problem.  I've tried over 20 times.

---

Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects and unknown namespaces.

Answer 4

Forgive me Matt. I had no idea that Microsoft personnel answered these questions.  It was not my intention to waste anyone's time. I'm attaching the complete code.

http://sdrv.ms/OYG7ET

Answer 5

You didn't waste my time - part of my signature is the code thing because I often get very incomplete snippets of code that I can't figure out. 

I already tested your code as you wrote it above, and I couldn't reproduce any problem on RTM bits.  Your code doesn't seem to have any problems, I think that there's either a bug in RP that's been fixed in RTM (which I am using), or you are experiencing environmental issues. 

---

Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects and unknown namespaces.

Answer 6

Matt,

          Thank you so much for you time and efforts.  I figured out my problem and you were correct in that the syndication feed was building correctly.  I was not accounting for the data being cached so when I ran multiple iterations it didn't build records because they were already there. However, unlimitedly,  my problem was that I was missing the all important:

DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}"

 and the tiles were not being rendered.  I assumed that with a collection count of zero and no tiles that the syndication feed was the problem. I'm new to C# and have only studied the text of MVVM which I see has some presence in the "Windows 8" style interface.

Thanks again.