我在使用我的父项目中的Listbox来显示在用户控件中定义的属性时遇到问题。更具体地说,我创建了一个包含webbrowsercontrol的用户控件,并且我定义了一个名为History的属性,它包含浏览会话期间访问过的URL的历史记录。我也有一个父项目,它链接到这个用户控件,我试图将History属性绑定到一个Listbox。重点是有人能够在此父项目中定义的Listbox中查看历史URL,其中历史URL通过绑定到用户控件的History属性来填充。如何将usercontrol属性绑定到Listbox
下面是我的代码概述什么,我试图做的:
用户控制FullWebBrowser.xaml.cs
public partial class FullWebBrowser : UserControl
{
//ctr
public FullWebBrowser()
{
InitializeComponent();
//for FullWebBrowser.xaml ContentGrid
ContentGrid.DataContext = this;
}
#region Fields
//The navigation urls of the browser.
private readonly Stack<Uri> _NavigatingUrls = new Stack<Uri>();
//The history for the browser
private readonly ObservableCollection<string> _History = new ObservableCollection<string>();
/// <summary>
/// Gets the History property for the browser.
/// </summary>
public ObservableCollection<string> History
{
get { return _History; }
}
的_NavigatingUrls堆栈是前进和后退按钮实现,这是工作的罚款和_history的ObservableCollection包含来自会话网页浏览中显示的网址如下
//If the navigated uri is not in thehistory, add it
if (!_History.Contains(e.Uri.ToString()))
_History.Add(e.Uri.ToString());
这些似乎能正常工作,如I H大街实施了前进和后退按钮,他们工作正常。问题是我无法将FullWebBrowser.xaml.cs中定义的History属性正确绑定到包含Listbox的父项目。这显示如下
HistoryPage.xaml
xmlns:my="clr-namespace:FullBrowserControl;assembly=FullBrowserControl">
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<!--Pivot Control-->
<controls:Pivot Title="QUEST">
<!--Pivot item one-->
<controls:PivotItem Header="today">
<Grid/>
</controls:PivotItem>
<!--Pivot item two-->
<controls:PivotItem Header="week">
<Grid/>
</controls:PivotItem>
<!--Pivot item three-->
<controls:PivotItem Header="all">
<StackPanel>
<ScrollViewer>
<ListBox x:Name="ListBox" ItemsSource="{Binding}"
SelectionChanged="ListBox_SelectionChanged">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding Path=History}" Height="Auto"/>
<TextBlock Foreground="{StaticResource PhoneSubtleBrush}"
Text="{Binding Modified, Converter={StaticResource DateConverter}}"
Margin="24,0,0,12"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Scrollviewer>
</StackPanel>
<!--<Grid/>-->
</controls:PivotItem>
</controls:Pivot>
</Grid>
注意,dateconverter是确定的。在这里,我试图实现一个Listbox,它显示带有时间戳的url。 落后于这个父项目页面的代码如下所示
Historypage.xaml.cs
public partial class HistoryPage : PhoneApplicationPage
{
//Temporary State
public static readonly Setting<int> CurrentHistoryIndex = new Setting<int>("CurrentHistoryIndex", -1);
private FullWebBrowser browser = new FullWebBrowser();
public HistoryPage()
{
InitializeComponent();
//create new instance of FullWebBrowser user control?
this.browser = new FullWebBrowser();
this.DataContext = browser;
//browser.DataContext = this;
//this.DataContext = browser.History;
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
//Clear the selection so selecting the same item twice in a row will still raise the SelectedChanged event
CurrentHistoryIndex.Value = -1;
this.ListBox.SelectedIndex = -1;
}
void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (ListBox.SelectedIndex >= 0)
{
//navigate to the page containing the user control for the selected item
//how to navigate to Mainpage.xaml and load webbrowsercontrol with selected url??
CurrentHistoryIndex.Value = ListBox.SelectedIndex;
this.NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative));
}
}
}
所以这是我的基本实现。无论我尝试什么,我都无法将Historypage中的Listbox绑定到项目外包含的FullWebBrowser用户控件的History属性,我已经使用解决方案资源管理器中的references选项引用了FullWebBrowser控件, Historypage.xaml.cs顶部,以及HistoryPage.xaml顶部的xmlns语句
任何有关如何完成这项任务的帮助将不胜感激!我一直在研究这个问题几个星期,无法在任何地方找到解决方案,甚至在其他人的帖子上徘徊。我必须尽快实施这个解决方案!感谢您提前提供的所有帮助。请包括代码来完成这一点,这将有助于看到这是如何实现以供将来参考!
运行它时检查输出窗口,您是否看到一些绑定错误? – 2012-02-26 07:15:59