[英]How can I serialize a collection of SyndicationItem objects?
我有一個需要序列化的SyndicationItem對象集合,但是我不確定該怎么做。 有什么建議嗎?
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;
}
如果要序列化SyndicationItem,則可以使用SaveAsRss20和SaveAsAtom10兩種方法 。 要序列化集合,請一個接一個地迭代並將其寫入某個流
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();
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