Managing provider based syndicated content

The example code below shows how to use the static SyndicationManager class to persist, retrieve, update and remove a simple RSS feed whose content is managed by the configured default provider. The task of managing provider-back syndicated content can be performed in a variety of application contexts, including console applications, smart clients, and ASP.NET web applications.

Guid resourceId                         = new Guid("3D586B56-1057-4b43-AD2C-9E99C58918E6");

// Get managed resource
ISyndicationResource managedResource    = SyndicationManager.GetResource(resourceId);

if (managedResource == null)
{
    RssFeed rssFeed                 = new RssFeed(new Uri(String.Format(null, "http://localhost/syndication.axd?id={0}", resourceId.ToString())), "Example RSS Feed");
    rssFeed.Channel.Description     = "An example RSS feed.";
    rssFeed.Channel.PublicationDate = new DateTime(2008, 3, 26, 9, 29, 30);
    rssFeed.Channel.LastBuildDate   = DateTime.Now;
    rssFeed.Channel.ManagingEditor  = "John Doe (john.doe@example.com)";
    rssFeed.Channel.TimeToLive      = 60;

    RssItem item        = new RssItem();
    item.Author         = "Sally Smith (sally.smith@example.com)";
    item.Link           = new Uri("http://localhost/2008/03/26/Simple+RSS+Item.aspx");
    item.Title          = "Simple RSS Item";
    item.Description    = "A basic RSS channel item";

    rssFeed.Channel.AddItem(item);

    // Create managed resource
    SyndicationResourceCreateStatus status  = SyndicationManager.CreateResource(resourceId, rssFeed);
    if (status != SyndicationResourceCreateStatus.Success)
    {
        // Handle creation failure
    }
}
else
{
    RssFeed feed    = null;
    if (managedResource.Format == SyndicationContentFormat.Rss)
    {
        feed    = (RssFeed)managedResource;
        foreach (RssItem item in feed.Channel.Items)
        {
            // Process current channel item
        }

        //  Update managed resource
        feed.Channel.Language   = new CultureInfo("en-US");
        feed.Channel.Categories.Add(new RssCategory("Channel Category"));
        feed.Channel[0].Categories.Add(new RssCategory("Item Category"));
        feed.Channel.LastBuildDate  = DateTime.Now;

        SyndicationManager.UpdateResource(resourceId, feed);
    }

    // Get all managed resources based on content format
    Collection <ISyndicationResource> managedResources  = SyndicationManager.GetResources(SyndicationContentFormat.Rss);
    foreach (ISyndicationResource resource in managedResources)
    {
        RssFeed currentFeed = resource as RssFeed;

        foreach (RssItem item in currentFeed.Channel.Items)
        {
            // Process current channel item of current feed
        }
    }

    // Remove managed resource
    SyndicationManager.DeleteResource(resourceId);
}