private void addNewFeedButtonClick(object sender, RoutedEventArgs e)
{
addNewFeedButton.IsEnabled = newFeedUrlTextBox.IsEnabled = false;
var address = newFeedUrlTextBox.Text;
if (Settings.RssFeeds.Any(f => f.Address == address))
{
MessageBox.Show("The specified feed has already been added.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
addNewFeedButton.IsEnabled = newFeedUrlTextBox.IsEnabled = true;
return;
}
Task.Factory.StartNew(() =>
{
// Validate feed
var client = new WebClient();
try
{
var feed = client.DownloadString(address);
var document = XDocument.Parse(feed);
if (!RssFeed.ValidateFeed(document))
{
throw new Exception();
}
var rss = new RssFeed(address);
Dispatcher.BeginInvoke(new Action(() =>
{
Settings.RssFeeds = Settings.RssFeeds.Concat(new[] { rss }).ToArray();
Settings.OnPropertyChanged("RssFeeds");
addNewFeedButton.IsEnabled = newFeedUrlTextBox.IsEnabled = true;
newFeedUrlTextBox.Text = string.Empty;
feedListView.SelectedItem = rss;
}));
}
catch
{
MessageBox.Show("The specified feed is not valid.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
Dispatcher.BeginInvoke(new Action(() => addNewFeedButton.IsEnabled = newFeedUrlTextBox.IsEnabled = true));
}
});
}
