Silverlight:如何更改TreeViewItem文本颜色,当它被选中
问题描述:
我有HierarchicalDataTemplate里面的TextBlock。当TreeViewItem选择时,我需要将前景色设置为红色。Silverlight:如何更改TreeViewItem文本颜色,当它被选中
<controls:TreeView Background="#FF939597"
ScrollViewer.HorizontalScrollBarVisibility="Disabled" x:Name="CommentTreeView" Margin="0,0,0,118"
ItemContainerStyle="{StaticResource SectionsTreeViewItemStyle}">
<controls:TreeView.ItemTemplate>
<control:HierarchicalDataTemplate ItemsSource="{Binding SubSections}" ItemContainerStyle="{StaticResource SectionsTreeViewItemStyle}">
<Grid>
<TextBlock x:Name="ItemTextBlock" Margin="0,6,48,0"
<!-- ??? Foreground="Red" ??? if item selected ??? -->
FontSize="11" Text="{Binding Path=Name}"
TextWrapping="Wrap" VerticalAlignment="Top">
</TextBlock>
</Grid>
</control:HierarchicalDataTemplate>
</controls:TreeView.ItemTemplate>
</controls:TreeView>
答
可以使用的RelativeSource的自定义实现Silverlight的做到这一点:
http://www.codeproject.com/Articles/36500/Implementing-RelativeSource-binding-in-Silverlight.aspx
<UserControl.Resources>
<Converters:BackgroundConverter x:Key="BackgroundConverter"/>
</UserControl.Resources>
<controls:TreeView Background="#FF939597"
ScrollViewer.HorizontalScrollBarVisibility="Disabled" x:Name="CommentTreeView" Margin="0,0,0,118"
ItemContainerStyle="{StaticResource SectionsTreeViewItemStyle}">
<controls:TreeView.ItemTemplate>
<control:HierarchicalDataTemplate ItemsSource="{Binding SubSections}" ItemContainerStyle="{StaticResource SectionsTreeViewItemStyle}">
<Grid>
<TextBlock x:Name="ItemTextBlock" Margin="0,6,48,0"
FontSize="11" Text="{Binding Path=Name}"
TextWrapping="Wrap" VerticalAlignment="Top">
<local:BindingHelper.Binding>
<local:BindingProperties TargetProperty="Foreground" SourceProperty="IsSelected"
Converter="{StaticResource BackgroundConverter}"
RelativeSourceAncestorType="TreeViewItem"/>
</local:BindingHelper.Binding>
</TextBlock>
</Grid>
</control:HierarchicalDataTemplate>
</controls:TreeView.ItemTemplate>
</controls:TreeView>