前言: 最近几天微软Live Search公布了重新架构了
Live Search API(版本为2.0 Beta)该API律属于微软
最新Live Search Service项目 – Silk Road(丝绸的路)那么如何在Silverlight中
Live Search Service呢来进行网页
图片资讯等搜索呢？本篇将带大家走进Silverlight+Live News Search
美妙世界再阅读本篇文章的前请先阅读上篇文章:Silverlight专题(12) - 基于Silverlight
Live Search网页搜索解决方案: UI层和Silverlight专题(12) - 基于Silverlight
Live Search网页搜索几乎没有任何差异所以直接列出修改部分代码如下
Code
1<ListBox x:Name="NewsPanelCtl" Grid.Row="2" Grid.ColumnSpan="2" Margin="2,0" BorderThickness="0" Background="#3c3c3c" Height="500" Visibility="Collapsed">
2 <ListBox.ItemTemplate>
3 <DataTemplate>
4 <StackPanel Width="480">
5 <HyperlinkButton Content="{Binding Title}" NavigateUri="{Binding OriginalUrl}" TargetName="_blank"/>
6 <TextBlock Margin="0,2" TextWrapping="Wrap" Text="{Binding Snippet}"/>
7 <StackPanel Orientation="Horizontal">
8 <TextBlock Text="{Binding Source}" FontSize="10" Foreground="Green"/>
9 <Ellipse Fill="Green" Width="3" Height="3" Margin="2"/>
10 <TextBlock Text="{Binding PublishDate}" FontSize="10"/>
11 </StackPanel>
12 </StackPanel>
13 </DataTemplate>
14 </ListBox.ItemTemplate>
15</ListBox>底层
代码如下:Code
1privatevoid SearchBtnCtl_Click(object sender, RoutedEventArgs e)
2{
3 this.SearchBtnCtl.IsEnabled =false;
4 LiveSearchPortTypeClient liveSearchClient =
LiveSearchPortTypeClient
;
5 SearchRequest webRequest = SearchRequest;
6 webRequest.AppId ="44980C5CFA65792B3CDFF33A5CBF2CFAD17E3349";
7 webRequest.Market ="zh-CN";
8 webRequest.Version ="2.0";
9 webRequest.Sources = SourceType
{ SourceType.News};
10 webRequest.Query =this.KeywordsCtl.Text.Trim;
11 webRequest.Options = SearchOption { SearchOption.EnableHighlighting };
12
13 liveSearchClient.SearchAsync(webRequest);
14 liveSearchClient.SearchCompleted 
EventHandler<SearchCompletedEventArgs>(liveSearchClient_SearchCompleted);
15}
16
17void liveSearchClient_SearchCompleted(object sender, SearchCompletedEventArgs e)
18{
19 SearchResponse liveSearchResponse = e.Result;
20
21 //News Search
22 NewsResponse sResponse = liveSearchResponse.News;
23 this.WebNumCtl.Text = String.Format("共{0}条搜索结果", sResponse.Total);
24 List<NewsInfo> m_sList = List<NewsInfo>;
25 
(sResponse.Results.Length >0)
26 {
27 foreach(NewsResult sResult in sResponse.Results)
28 {
29 NewsInfo sInfo = NewsInfo;
30 sInfo.Title = sResult.Title;
31 sInfo.Source = sResult.Source;
32 sInfo.Snippet = sResult.Snippet;
33 sInfo.PublishDate = sResult.Date;
34 sInfo.OriginalUrl = sResult.Url;
35 m_sList.Add(sInfo);
36 }
37
38 this.NewsPanelCtl.ItemsSource= m_sList;
39 }
40
41 this.NewsPanelCtl.Visibility = Visibility.Visible;
42 this.SearchBtnCtl.IsEnabled =true;
43}其中还可在12行添加如下代码:
webRequest.News = NewsRequest;
webRequest.News.Category = "rt_Business";
webRequest.News.SortBy = NewsSortOption.Date;
webRequest.News.SortBySpecied = true;其中Category用来限制搜索
新闻类别目前含有
类别有rt_Business(商业新闻)
rt_Entertainment(娱乐新闻)
rt_Health(健康新闻)
rt_Political(政治新闻)
rt_Scient
ic(科学新闻) rt_Sports(体育新闻)
rt_US(美国国内新闻)
rt_World(世界新闻)
rt_Local(本地新闻)
rt_ScienceAndTechnology(科技新闻) 而SortBy用来设置发送到客户端
新闻以什么样排序来发送(默认情况下是以最相关排序发送)
其外还有LocationOverride属性
用来做新闻位置过滤不过目前只有美国地址才可用而Off
是
个非常有用属性你可以依靠这个属性实现Live Search分页浏览(顾名思义
Off就是用来表示目前想要获得新闻位置和
化第条新闻位置的间差距比如
你点击第 2页时事实上Live Search将Off设置成了10就可以得到第11~20条新闻了)NewsInfo
类定义如下:Code
1public
NewsInfo
2{
3 public
Title { get; ; }
4 public Snippet { get; ; }
5 public PublishDate { get; ; }
6 public Source { get; ; }
7 public OriginalUrl { get; ; }
8}结果展示: 展示
如下(部署在了http://Streaming.live.com)和Live Search搜索结果比较:
文章来源: http://www.cnblogs.com/ibillguo/archive
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