您正在使用下面给出的XAML文件。我想将列表框选定项目导航到另一页。
<ListBox x:Name="NotchsList11" Grid.ColumnSpan="2"
Margin="0,0,0,0" Grid.Row="3" HorizontalAlignment="left" Width="720" Grid.RowSpan="2">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Margin="0,0,0,0" Grid.ColumnSpan="3" x:Name="ControlsPanel"
Grid.Column="0"
Height="215"
VerticalAlignment="Top">
<StackPanel Background="#eb2427" Orientation="Horizontal">
<TextBlock Grid.Row="1" FontFamily="Calibri" FontSize="34" FontWeight="Bold" FontStyle="Normal" Margin="10,0,0,0"
Text="{Binding name}"
/>
</StackPanel>
<ScrollViewer ScrollViewer.HorizontalScrollBarVisibility="Visible" ScrollViewer.VerticalScrollBarVisibility="Disabled">
<StackPanel>
<StackPanel VerticalAlignment="Top" Width="Auto">
<ListBox ItemsSource="{Binding Images}" SelectionChanged="NotchsList11_SelectionChanged" Width="Auto" ScrollViewer.VerticalScrollBarVisibility="Disabled">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" VerticalAlignment="Top">
</StackPanel>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Image Source="{Binding}" Width="160" Height="120" VerticalAlignment="Top"></Image>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</StackPanel>
</ScrollViewer>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
我的xml文件在下面给出
<?xml version="1.0" encoding="utf-8" ?>
<root>
<Categories>
<Category name="Photos">
<Articles>
<article title="Sherawat's">
<FullContent>
<style> img {padding:2px;} </style><p> <img alt=" Sherawat" pimcore_disable_thumbnail="true" pimcore_id="5853" pimcore_type="asset" src="http://feb2013/bolly---sherawat-s-upcoming-movie-dirty-politics/90_mallika-sherawat_bolly.jpg" style="width: 500px; height: 370px; float: left;" /></p> <p>Sherawat is all set to begin shooting for <em>Dirty Politics</em> where she plays Bhanwari Devi, a nurse whose murder hit the headlines last year. Meanwhile, she gets talking on Hollywood where she has not really had any meaty roles.</p>
</FullContent>
<thumb_image>
<image url="http://sss.com/Photo1.jpeg"/>"/>
</thumb_image>
</article>
<article articleid="2684" title="Steals the Mai Show">
<FullContent>
<div id="container" class="cf">
<link rel="stylesheet" href="http://sss.com/imageslider/app/css/demo.css" type="text/css" media="screen" /> <link rel="stylesheet" href="http://sss.com/imageslider/app/css/flexslider.css" type="text/css" media="screen" /><div id="main" role="main"> <section class="slider"> <div class="flexslider"> <ul class="slides"><li>Sonam Kapoor<img src="http://sss.com//website/var/tmp/thumb_5814_1_01feb2013__appfeed.jpeg" alt="Kapoor"/>/li> </ul></li>
</div>
</FullContent>
<thumb_image>
<image url="http://Photo2.jpeg"/>"/>
</thumb_image>
</article>
</Articles>
</Category>
<Category name="Videos">
<Articles>
<article articleid="415" title=" Dirty Politics">
<FullContent>
<style> img {padding:2px;} </style><p> <img alt="Sherawat" pimcore_disable_thumbnail="true" pimcore_id="5853" pimcore_type="asset" src="http://sss.com/bolly/feb2013/bolly---sherawat-s-upcoming-movie-dirty-politics/90_sherawat_bolly.jpg" style="width: 500px; height: 370px; float: left;" /></p>
</FullContent>
<thumb_image>
<image url="http://Video1.jpeg"/>"/>
</thumb_image>
</articles>
<article articleid="68" title="Digital!">
<FullContent>
<p> Touch, tap, flip, slide! You don'you experience it.</p> <br/><br/><br/> <br/><br/>
</FullContent>
<thumb_image>
<image url="http://Video2.jpeg"/>"/>
</thumb_image>
</article>
</Article>
</Category>
<Category name="Bolly">
<Articles>
<article articleid="415" title="upcoming movie">
<FullContent>
<style> img {padding:2px;} </style><p> <img alt="Sherawat" pimcore_disable_thumbnail="true" pimcore_id="5853" pimcore_type="asset" src="http://sss.com/bolly/feb2013/bolly---sherawat-s-upcoming-movie-dirty-politics/90_sherawat_bolly.jpg" style="width: 500px; height: 370px; float: left;" /></p>
</FullContent>
<thumb_image>
<image url="http://sss.com/website/var/tmp/thumb_5854_90_mallika-sherawat_thumb_bolly__forfeed.jpeg"/>
</thumb_image>
</articles>
<article articleid="436" title="Surprise Package">
<Description>
There was more than just good music at the trio's recent performance
</Description>
<FullContent>
<style> img {padding:2px;} </style><p> <img alt="Akcent" pimcore_disable_thumbnail="true" pimcore_id="6110" pimcore_type="asset" src="http://dev2.mercuryminds.com/global/feb2013/surprise-package-at-akcent-concert/18_akcent_global.jpg" style="width: 370px; height: 500px; float: left;" /></p>
</FullContent>
<thumb_image>
<image url="http://sss.com/website/var/tmp/thumb_6109_18_akcent_thumb__forfeed.jpeg"/>
</thumb_image>
</article>
</Article>
</Category>
</Categories>
</root>
我的MainPage.xaml.cs代码
void ParseXMLFile(string dataInXmlFile)
{
try
{
//Parsing XML File
XDocument xmlDoc = XDocument.Parse(dataInXmlFile);
var query = from l in xmlDoc.Descendants("Category")
select new Notch
{
name = (string)l.Attribute("name").Value,
Titles = l.Element("Articles").Elements("article")
.Select(s => s.Attribute("title").Value)
.ToList(),
Images = l.Element("Articles").Elements("article")
.Elements("thumb_image").Elements("image")
.Select(x => x.Attribute("url").Value).ToList(),
};
foreach (var result in query)
{
Console.WriteLine(result.name);
foreach (var detail in result.Titles.Zip(result.Images, (st, si) => string.Format("{0} {1}", st, si)))
{
Console.WriteLine(detail);
}
}
NotchsList11.ItemsSource= query;
}
catch(Exception e)
{
MessageBox.Show("Binding Failed");
}
}
private void NotchsList11_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
Notch selectedItemData = (sender as ListBox).SelectedValue as Notch;
if(selectedItemData != null)
{
NavigationService.Navigate(new Uri(string.Format("/Test.xaml?parameter",selectedItemData.articleid), UriKind.Relative));
}
}
我的DetailPage.xaml.cs
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
base.OnNavigatedTo(e);
string parameter = this.NavigationContext.QueryString["parameter"];
}
如果我点击任何图片，相关标题和fullcontent导航到详细信息页面，但fullcontent想要在详细信息页面上显示webview。所以我尝试了这段代码但是selectedItemData得到了null值。我无法导航到其他页面。所以任何人都可以帮我解决这个问题吗？
答案 0 :(得分：0)
在ListBox的SelectionChanged事件处理程序中，添加此行
override NotchsList11_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var item = NotchsList11.Items[NotchsList11.SelectedIndex] as YourClassUsedForBinding;
if(item.SomeProperty == "Something")
NavigationService.Navigate(new Uri("/YourNewPage.xaml", UriKind.Relative));
else
NavigationService.Navigate(new Uri("/YourOtherPage.xaml", UriKind.Relative));
//if more cases use a switch case
}
答案 1 :(得分：0)
您已为列表框设置了ItemsSource="{Binding Images}"，这意味着您不应该在Notch中投放到SelectionChangedHandler。每个项目都接收一个图像作为其数据上下文，这是Images实例中列表Notch中的一个元素。
因此，您只能在处理程序中强制转换为String。
您有一个顶级列表框，每个项目都有自己的列表框。您正在跟踪内部列表的选择更改，在这种情况下，您的数据上下文是 列表的单独项目。您无权访问其中的父作用域。
答案 2 :(得分：0)
private void NotchsList11_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var lb = sender as ListBox;
if (lb == null) return;
var articleSubItem = lb.SelectedItem as NotchSubItem;
if (articleSubItem == null) return;
App.CurrentArticle = articleSubItem;
NavigationService.Navigate(new Uri("/Test.xaml?selectedItem=" + articleSubItem.ArticleId, UriKind.Relative));
NotchsList11.SelectedIndex = -1;
}
设置详细信息页面
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
string selectedIndex = "";
if (NavigationContext.QueryString.TryGetValue("selectedItem", out selectedIndex))
{
title.Text = App.CurrentArticle.Titles;
webBrowser.NavigateToString(App.CurrentArticle.FullContent);
}
base.OnNavigatedTo(e);
}
MainPage.xaml页面
<StackPanel Width="Auto">
<StackPanel VerticalAlignment="Top" Width="Auto">
<ListBox ItemsSource="{Binding Articles}" Margin="5,5,5,0" Width="Auto" ScrollViewer.VerticalScrollBarVisibility="Disabled" SelectionChanged="NotchsList11_SelectionChanged">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" VerticalAlignment="Top">
</StackPanel>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Border BorderBrush="#302c2d" Background="#302c2d" BorderThickness="5,5,5,0" Name="image" Margin="3,0,3,0">
<Image Source="{Binding Image}" Width="141" Height="95" Name="value" Stretch="Fill" VerticalAlignment="Top"></Image>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
<StackPanel Orientation="Horizontal" VerticalAlignment="Top" Width="Auto">
<ListBox x:Name="NotchsList11" ItemsSource="{Binding Articles}" Margin="5,0,5,0" ScrollViewer.VerticalScrollBarVisibility="Disabled" SelectionChanged="NotchsList11_SelectionChanged">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal">
</StackPanel>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate >
<Border BorderBrush="#302c2d" Background="#302c2d" BorderThickness="5,5,5,0" Margin="3,0,3,0">
<TextBlock Text="{Binding Titles}" Width="141" Height="90" Padding="3,0,0,30" TextWrapping="Wrap"></TextBlock>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</StackPanel>
MainPage.xaml.cs中
XDocument xmlDoc = XDocument.Parse(dataInXmlFile);
var query = from l in xmlDoc.Descendants("Category")
select new Notch
{
name = (string)l.Attribute("name").Value,
Titles = l.Element("Articles").Elements("article")
.Select(s => s.Attribute("title").Value)
.ToList(),
Articles = l.Element("Articles").Elements("article")
.Select(article => new NotchSubItem
{
Image = article.Element("thumb_image").Element("image").Attribute("url").Value,
ArticleId = article.Attribute("articleid").Value,
FullContent = article.Element("FullContent").Value.ToString(),
Titles = article.Attribute("title").Value,
})
.ToList(),
Images = l.Element("Articles").Elements("article").Elements("thumb_image").Elements("image")
.Select(x => x.Attribute("url").Value).ToList(),
};
foreach (var result in query)
{
Console.WriteLine(result.name);
foreach (var detail in result.Titles.Zip(result.Images, (st, si) => string.Format("{0} {1}", st, si)))
{
Console.WriteLine(detail);
}
}
NotchsList11.ItemsSource = query;
}
catch(Exception e)
{
MessageBox.Show("Binding Failed");
}