Building a Windows 8 RSS Reader: Listing 6

The MainPage class.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Windows.Foundation;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Data;
using VSMWinRTDemo.RSS;

namespace VSMWinRTDemo.UI
{
    partial class MainPage
    {
        private int _maxFeeds = 20;

        public MainPage()
        {
            InitializeComponent();
            Loaded += new RoutedEventHandler(MainPage_Loaded);
            FeedListView.SelectionChanged += new 
            SelectionChangedEventHandler(FeedListView_SelectionChanged);
            FetchButton.Click += new RoutedEventHandler(FetchButton_Click);
        }

        void FeedListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ListView rssFeeds = (sender as ListView);
            RSSItem selectedItem = rssFeeds.SelectedItem as RSSItem;
 
            if (selectedItem != null && selectedItem.Links.Count > 0)
            {
                RSSItemWebView.Navigate(selectedItem.Links[0].Link);
            }
        }

        async void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            await GetFeeds("http://visualstudiomagazine.com/rss-feeds/columns.aspx"); 
        }

        private async void FetchButton_Click(object sender, RoutedEventArgs e)
        {
            if (!String.IsNullOrWhiteSpace(FeedUrl.Text))
            {
                await GetFeeds(FeedUrl.Text);
            }
        }
        private async Task GetFeeds(string url)
        {
            RSSFeed feeds = await _client.GetFeeds(url, _maxFeeds);
            this.DataContext = feeds;
        }
    }
}

About the Author

Eric Vogel is a Sr. Software Developer at Kunz, Leigh, & Associates in Okemos, MI. He is the president of the Greater Lansing User Group for .NET. Eric enjoys learning about software architecture and craftsmanship, and is always looking for ways to create more robust and testable applications. Contact him at vogelvision@gmail.com.