如何序列化SyndicationItem對象的集合？

Question

我有我需要序列化的SyndicationItem對象的集合，但我不知道我如何去做這件事。建議？

IEnumberable<SyndicationItem> blogPosts = GetBlogPosts(); 

... 

private IEnumerable<SyndicationItem> GetBlogPosts() 
{ 
    var query = Enumerable.Empty<SyndicationItem>(); 
    foreach (string feed in Feeds) 
    { 
    try 
    { 
     using (XmlReader reader = XmlReader.Create(feed)) 
     { 
     query = query.Union((from item in SyndicationFeed.Load(reader).Items 
      orderby item.PublishDate descending 
       select item).Take(NumberOfItemsToDisplay)); 
     } 
    } 
    catch (Exception ex) 
    { 
     Console.WriteLine("Invalid Feed: {0} ({1})", feed, ex.Message); 
    } 
    } 
    query = query.OrderByDescending(i => i.PublishDate).Take(NumberOfItemsToDisplay); 
    return query; 
} 

Answer 1

如果你想序列化SyndicationItem，它有幾個方法，你可以使用SaveAsRss20，SaveAsAtom10。要序列化收集，逐個迭代並將其寫入一些流

SyndicationItem item = new SyndicationItem("Item Title", "Item Content", new Uri("http://Item/Alternate/Link"), "itemID", DateTimeOffset.Now); 
XmlWriter writer = XmlWriter.Create("outfile.xml"); 
item.SaveAsRss20(writer); 
writer.Close();