实现一个RSS阅读器，通过你输入的RSS地址来获取RSS的信息列表和查看RSS文章中的详细内容。RSS阅读器是使用了WebClient类来获取网络上的RSS的信息，然后再转化为自己定义好的RSS实体类对象的列表，最后绑定到页面上。

（1）       RSS实体类和RSS服务类

RssItem.cs

RssService.cs

using System;using System.Collections.Generic;using System.IO;using System.Net;using System.ServiceModel.Syndication;using System.Xml;

namespace WindowsPhone.Helpers{///<summary>/// 获取网络RSS服务类///</summary>publicstaticclass RssService    {

///<summary>/// 获取RSS目录列表///</summary>///<param name="rssFeed">RSS的网络地址</param>///<param name="onGetRssItemsCompleted">获取完成事件</param>publicstaticvoid GetRssItems(string rssFeed, Action<IEnumerable<RssItem>> onGetRssItemsCompleted =null, Action<Exception> onError =null, Action onFinally =null)        {            WebClient webClient =new WebClient();

//注册webClient读取完成事件            webClient.OpenReadCompleted +=delegate(object sender, OpenReadCompletedEventArgs e)            {try                {

if (e.Error !=null)                    {if (onError !=null)                        {                            onError(e.Error);                        }return;                    }

//将网络获取的信息转化成RSS实体类                    List<RssItem> rssItems =new List<RssItem>();                    Stream stream = e.Result;                    XmlReader response = XmlReader.Create(stream);                    SyndicationFeed feeds = SyndicationFeed.Load(response);foreach (SyndicationItem f in feeds.Items)                    {                        RssItem rssItem =new RssItem(f.Title.Text, f.Summary.Text, f.PublishDate.ToString(), f.Links[0].Uri.AbsoluteUri);                        rssItems.Add(rssItem);                    }

//通知完成返回事件执行if (onGetRssItemsCompleted !=null)                    {                        onGetRssItemsCompleted(rssItems);                    }                }finally                {if (onFinally !=null)                    {                        onFinally();                    }                }            };

            webClient.OpenReadAsync(new Uri(rssFeed));        }    }}

（2）       RSS页面展示

MainPage.xaml

<phone:PhoneApplicationPage x:Class="ReadRssItemsSample.MainPage"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"    FontFamily="{StaticResource PhoneFontFamilyNormal}"    FontSize="{StaticResource PhoneFontSizeNormal}"    Foreground="{StaticResource PhoneForegroundBrush}"    SupportedOrientations="Portrait" Orientation="Portrait"    shell:SystemTray.IsVisible="True">

<Grid x:Name="LayoutRoot" Background="Transparent"><Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition Height="*"/></Grid.RowDefinitions>

<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28"><TextBlock x:Name="ApplicationTitle" Text="RSS阅读器" Style="{StaticResource PhoneTextNormalStyle}"/></StackPanel>

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"><Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition  Height="*"/></Grid.RowDefinitions><TextBlock FontSize="30" Grid.Row="1" Height="49" HorizontalAlignment="Left" Margin="0,6,0,0" Name="textBlock1" Text="RSS地址" VerticalAlignment="Top" Width="116"/><TextBox Grid.Row="1" Height="72" HorizontalAlignment="Left" Margin="107,0,0,0" Name="rssURL" Text="http://www.cnblogs.com/rss" VerticalAlignment="Top" Width="349"/><Button Content="加载 RSS" Click="Button_Click" Margin="-6,72,6,552" Grid.Row="1"/><ListBox x:Name="listbox" Grid.Row="1" SelectionChanged="OnSelectionChanged" Margin="0,150,6,-11"><ListBox.ItemTemplate  ><DataTemplate><Grid><Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition Height="Auto"/><RowDefinition Height="60"/></Grid.RowDefinitions><TextBlock Grid.Row="0" Text="{Binding Title}" Foreground="Blue"/><TextBlock Grid.Row="1" Text="{Binding PublishedDate}" Foreground="Green"/><TextBlock Grid.Row="2" TextWrapping="Wrap" Text="{Binding PlainSummary}"/></Grid></DataTemplate></ListBox.ItemTemplate></ListBox></Grid></Grid>

</phone:PhoneApplicationPage>

MainPage.xaml.cs

using System.Windows;using System.Windows.Controls;using Microsoft.Phone.Controls;using WindowsPhone.Helpers;

namespace ReadRssItemsSample{publicpartialclass MainPage : PhoneApplicationPage    {privatestring WindowsPhoneBlogPosts ="";

public MainPage()        {            InitializeComponent();        }

privatevoid Button_Click(object sender, RoutedEventArgs e)        {if (rssURL.Text !="")            {                WindowsPhoneBlogPosts = rssURL.Text;            }else            {                MessageBox.Show("请输入RSS地址！");return;            }//加载RSS列表            RssService.GetRssItems(                WindowsPhoneBlogPosts,                (items) => { listbox.ItemsSource = items; },                (exception) => { MessageBox.Show(exception.Message); },null                );        }

//查看文章的详细内容privatevoid OnSelectionChanged(object sender, SelectionChangedEventArgs e)        {if (listbox.SelectedItem ==null)return;

            var template = (RssItem)listbox.SelectedItem;

            MessageBox.Show(template.PlainSummary);

            listbox.SelectedItem =null;        }

    }}

（3）程序运行的效果如下

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