我有一个带有ListView的Metro App,其中包含以下定义：
<ListView Grid.Row="0" x:Name="lv" CanDragItems="True" CanReorderItems="True" IsTabStop="True" SelectionMode="Extended" VirtualizingStackPanel.VirtualizationMode="Recycling">
<ListView.ItemTemplate>
<DataTemplate>
<Grid Width="{Binding ElementName=lv,Path=ActualWidth}">
<Grid.RowDeFinitions>
<RowDeFinition/>
<RowDeFinition/>
</Grid.RowDeFinitions>
<Grid Grid.Row="0">
<Grid.ColumnDeFinitions>
<ColumnDeFinition Width="*"/>
<ColumnDeFinition Width="65"/>
</Grid.ColumnDeFinitions>
<TextBlock Grid.Column="0" x:Name="tb1" Foreground="{StaticResource SecondaryColourBrush}" HorizontalAlignment="Stretch"/>
<TextBlock Grid.Column="4" x:Name="tb2" Foreground="{StaticResource SecondaryColourBrush}" HorizontalAlignment="Right"/>
</Grid>
<Grid Grid.Row="1">
<Grid.ColumnDeFinitions>
<ColumnDeFinition Width="*"/>
<ColumnDeFinition Width="Auto"/>
<ColumnDeFinition Width="65"/>
</Grid.ColumnDeFinitions>
<TextBlock Grid.Column="0" x:Name="tb3" Foreground="{StaticResource QuadColourBrush}" HorizontalAlignment="Stretch" TextTrimming="WordEllipsis"/>
<TextBlock Grid.Column="1" x:Name="tb4" Foreground="{StaticResource QuadColourBrush}" HorizontalAlignment="Right"/>
</Grid>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
当ListView选择了一个项目时,我想将tb1和tb2的前景更改为白色.我该怎么做呢？
我尝试重写Themed Brushes和VisualStateGroup SelectionStates for Selected,但没有帮助.一个工作代码示例将不胜感激.
最后解决了这个问题,感谢这篇文章给了我这个想法：
http://blog.davemdavis.net/2012/11/12/controlling-the-datatemplate/
创建了一个BooleanToColourConverter
public sealed class BooleanToColourConverter : IValueConverter
{
public object Convert(object value,Type targettype,object parameter,string language)
{
return (value is bool && (bool)value) ? AppResources.TertiaryColourBrush : AppResources.PrimaryColourBrush;
}
public object ConvertBack(object value,string language)
{
return value is SolidColorBrush && ((SolidColorBrush)value).Color == AppResources.TertiaryColourBrush.Color;
}
}
在App.xaml中添加了此内容
<common:BooleanToColourConverter x:Key="BooleanToColourConverter"/>
然后像这样使用它：
Foreground="{Binding Tag,Converter={StaticResource BooleanToColourConverter},Mode=TwoWay,RelativeSource={RelativeSource Mode=TemplatedParent}}"