一个简易的 Windows 8 RSS 阅读器
先上运行截图：简单说明：右侧主要内容的显示使用了浏览器控件WebView，另外，一些说明放在了代码注释中。
本应用只有一张页面MainPage
前台代码如下：
XAML
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后台代码如下：
C#
1 using System;
2 using System.Collections.Generic;
3 using System.IO;
4 using System.Linq;
5 using System.Threading.Tasks;
6 using Windows.Foundation;
7 using Windows.Foundation.Collections;
8 using Windows.Storage;
9 using Windows.UI.Xaml;
10 using Windows.UI.Xaml.Controls;
11 using Windows.UI.Xaml.Controls.Primitives;
12 using Windows.UI.Xaml.Data;
13 using Windows.UI.Xaml.Input;
14 using Windows.UI.Xaml.Media;
15 using Windows.UI.Xaml.Navigation;
16 using Windows.Web.Syndication;
17
18 namespace Win8RssReader
19 {
20 public sealed partial class MainPage : Page
21 {
22 SyndicationClient syndicationClient;
23 SyndicationFeed currentFeed;
24
25 ///
26 /// WebView在打开target="_blank"的超链接时会打开电脑上的浏览器，为了避免这种情况，这段js可通过更改DOM，使所有超链接的target="_self"。
27 ///
28 string MyJs { get; set; }
29
30 public MainPage()
31 {
32 this.InitializeComponent();
33 }
34
35 async protected override void OnNavigatedTo(NavigationEventArgs e)
36 {
37 MyJs = await GetMyJs();
38 }
39
40 private async Task GetMyJs()
41 {
42 StorageFile jsFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///js.txt"));
43 string jsText = await FileIO.ReadTextAsync(jsFile);
44 return jsText;
45 }
46
47 private async void btnGetFeed_Click(object sender, RoutedEventArgs e)
48 {
49 string feedUriString = txtFeedUri.Text;
50 await GetFeedAsync(feedUriString);
51 DisplayFeed();
52 }
53
54 private async Task GetFeedAsync(string feedUriString)
55 {
56 Uri uri;
57 if (!Uri.TryCreate(feedUriString.Trim(), UriKind.Absolute, out uri))
58 {
59 txtMsg.Text = "url错误";
60 return;
61 }
62 if (syndicationClient == null)
63 {
64 syndicationClient = new SyndicationClient();
65 }
66 syndicationClient.BypassCacheOnRetrieve = true;
67 syndicationClient.SetRequestHeader("User-Agent", "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)");
68 txtMsg.Text = "开始下载...";
69 try
70 {
71 currentFeed = await syndicationClient.RetrieveFeedAsync(uri);
72 txtMsg.Text = "下载完成";
73 }
74 catch (Exception ex)
75 {
76 txtMsg.Text = ex.Message;
77 }
78 }
79
80 private void DisplayFeed()
81 {
82 if (currentFeed != null)
83 {
84 ISyndicationText title = currentFeed.Title;
85 txtFeedTitle.Text = title != null ? title.Text : "(没有标题)";
86 txtCount.Text = currentFeed.Items.Count.ToString();
87 listTitle.ItemsSource = currentFeed.Items;
88 listTitle.SelectedIndex = 0;//选中第0条，触发SelectionChanged事件。
89 }
90 }
91
92 private void listTitle_SelectionChanged(object sender, SelectionChangedEventArgs e)
93 {
94 var item = (SyndicationItem)listTitle.SelectedValue;
95 DisplayCurrentItem(item);
96 }
97
98 private void DisplayCurrentItem(SyndicationItem item)
99 {
100 if (item != null)
101 {
102 txtItemTitle.Text = item.Title != null ? item.Title.Text : "(没有标题)";
103 string content = "(没有内容)";
104 if (item.Content != null)
105 {
106 content = item.Content.Text;
107 }
108 else if (item.Summary != null)
109 {
110 content = item.Summary.Text;
111 }
112 content += MyJs;
113 webViewContent.NavigateToString(content);
114 }
115 }
116 }
117 }
引用文件js.txt中的内容如下：
//WebView在打开target="_blank"的超链接时会打开电脑上的浏览器，为了避免这种情况，这段js可通过更改DOM，使所有超链接的target="_self"。
var links = document.getElementsByTagName("a");
for (var i = 0; i < links.length; i++) {
links.target = "_self";
}
解决方案打包下载 Win8RssReader.rar
题外话：
感觉现在做Windows Store App开发的很少哦，真心希望能和感兴趣的朋友们交流交流。
欢迎留言 ^_^
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