我在 FlipView 中有一个 ListView
<FlipView
x:Name="flipView"
AutomationProperties.AutomationId="ItemsFlipView"
AutomationProperties.Name="Item Details"
TabIndex="1"
Width="Auto"
Grid.Row="2"
Grid.Column="1"
VerticalAlignment="Top"
HorizontalAlignment="Center"
ItemsSource="{Binding Source={StaticResource itemsViewSource}}" Padding="0" VirtualizingStackPanel.VirtualizationMode="Standard">
<FlipView.ItemTemplate>
<DataTemplate>
<!--
UserControl chosen as the templated item because it supports visual state management
Loaded/unloaded events explicitly subscribe to view state updates from the page
-->
<UserControl Loaded="StartLayoutUpdates" Unloaded="StopLayoutUpdates">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<StackPanel Grid.Column="1" Orientation="Vertical" Margin="0,100,0,0">
<ListView x:Name="ListofOptions" Height="400" Width="280"
ItemsSource="{Binding QuestionOptions}" SelectedValue="{Binding Answer,Mode=TwoWay}"
IsEnabled="{Binding IsEnabled,Mode=TwoWay}" >
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" >
<StackPanel.Resources>
<common:AltBackgroundConverter x:Key="BGConvertor" />
</StackPanel.Resources>
<StackPanel.Background>
<SolidColorBrush Color="{Binding IndexWithinParentCollection, Mode=OneWay, Converter={StaticResource BGConvertor}}"></SolidColorBrush>
</StackPanel.Background>
<TextBlock Text="{Binding OptionValue}" />
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackPanel>
</Grid>
</UserControl>
</DataTemplate>
</FlipView.ItemTemplate>
</FlipView>
我编写了一个 ListView 的值转换器来更改替代行的背景。这是Conventor的代码
public class AltBackgroundConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, string language)
{
if (!(value is int)) return null;
int index = (int)value;
if (index % 2 == 0)
return Colors.White;
else
return Colors.LightGray;
}
// No need to implement converting back on a one-way binding
public object ConvertBack(object value, Type targetType, object parameter, string language)
{
throw new NotImplementedException();
}
}
当列表框不在 FlipView 中时，一切正常，但是当 ListView 在 FlipView 中时，Conventor 不会执行。请给我建议。