public void AddFeed(Feed addfeed)
{
using (RssEntities addcontext = new RssEntities())
{
try
{
addcontext.Feeds.AddObject(addfeed);
addcontext.SaveChanges();
}
catch (Exception e)
{
string msg = e.Message;
string reason = "AddFeed Feeds.AddObject Exception";
throw new FaultException<DBRequestFault>
(new DBRequestFault(msg), reason);
}
try
{
List<News> feedNews = LoadNewsFromFeed(addfeed);
foreach (News item in feedNews)
{
addcontext.News.AddObject(item);
}
addcontext.SaveChanges();
}
catch (Exception e)
{
string msg = e.Message;
string reason = "AddFeed News.AddObjectt Exception";
throw new FaultException<DBRequestFault>
(new DBRequestFault(msg), reason);
}
}
}
private void UpdateFeed(Feed feed)
{
try
{
using (XmlReader reader = XmlReader.Create(feed.URL))
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(reader);
//compare the item.LastbuildDate
int result = DateTime.Compare(feed.LastTimeUpdate, GetLastBuildDate(xmlDoc));
if (result < 0 || feed.News.Count == 0)
{
using (RssEntities localContext = new RssEntities())
{
Feed delFeed = localContext.Feeds.First(f => f.ID == feed.ID);
localContext.Feeds.DeleteObject(delFeed);
localContext.SaveChanges();
using (RssEntities addContext = new RssEntities())
{
Feed addfeed = new Feed
{
ID = feed.ID,
Name = feed.Name,
URL = feed.URL
};
addContext.Feeds.AddObject(addfeed);
addContext.SaveChanges();
List<News> feedNews = LoadNewsFromFeed(addfeed);
foreach (News item in feedNews)
{
addContext.News.AddObject(item);
}
addContext.SaveChanges();
}
}
}
}
}
catch (FileNotFoundException fnfEx)
{
string msg = fnfEx.Message;
string reason = "UpdateFeed FileNotFoundException";
throw new FaultException<DBRequestFault>
(new DBRequestFault(msg), reason);
}
catch (Exception ex)
{
string msg = ex.Message;
string reason = "UpdateFeed Exception";
throw new FaultException<DBRequestFault>
(new DBRequestFault(msg), reason);
}
}
public RssService()
{
context = new RssEntities();
}