public void Poll(string url)
{
RssPoller poller = new RssPoller();
RssFeedData channel = new RssFeedData();
Action <object> action = (object obj) =>
{
RssParser parser = new RssParser();
string response = poller.GetReponse(url);
channel = parser.ParseRSS(response);
};
Task t1 = Task.Factory.StartNew(action, "alpha");
try
{
t1.Wait();
}
catch (System.Exception ex)
{
throw new Exception(ex.Message);
}
this.OnRaiseCustomEvent(new PollFinishedEventArgs(channel));
}
public RssFeedData ParseRSS(string feed)
{
this.reader = XmlReader.Create(new StringReader(feed));
if (!this.ValidateRssFeed())
{
throw new Exception("Invalid RSS feed");
}
this.reader.ReadToFollowing("channel");
RssFeedData channel = new RssFeedData();
channel.Items = new List <RssItem>();
bool header = true;
while (header)
{
this.reader.Read();
if (this.reader.IsStartElement())
{
switch (this.reader.Name)
{
case "title":
channel.Title = this.reader.ReadElementContentAsString();
break;
case "link":
channel.Link = this.reader.ReadElementContentAsString();
break;
case "description":
channel.Description = this.reader.ReadElementContentAsString();
break;
case "item":
header = false;
break;
}
}
}
RssItem item = new RssItem();
while (this.reader.Read())
{
switch (this.reader.Name)
{
case "title":
if (this.reader.IsStartElement())
{
item.Title = this.reader.ReadElementContentAsString();
}
break;
case "link":
if (this.reader.IsStartElement())
{
item.Link = this.reader.ReadElementContentAsString();
}
break;
case "description":
if (this.reader.IsStartElement())
{
item.Description = this.reader.ReadElementContentAsString();
}
break;
case "item":
if (!this.reader.IsStartElement())
{
channel.Items.Add(item);
}
break;
}
}
return(channel);
}
// the event to send out
public PollFinishedEventArgs(RssFeedData channelToPublish)
{
// constructor for the event
this.channel = channelToPublish;
}