Question

我正在尝试将ListBox中的ItemsPanel替换为WrapPanel，但样式上的ItemsPanelTemplate似乎没有效果。找到并应用样式是因为边框和背景颜色发生了变化，但使用snoop进行检查时没有显示WrapPanel。

<Style x:Key="CocktailGrid" TargetType="ListBox" BasedOn="{StaticResource {x:Type ListBox}}">
    <Setter Property="SnapsToDevicePixels" Value="true"/>
    <Setter Property="Background" Value="White" />
    <Setter Property="BorderThickness" Value="1" />
    <Setter Property="BorderBrush" Value="Black" />
    <Setter Property="OverridesDefaultStyle" Value="true" />
    <Setter Property="SelectionMode" Value="Single" />
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled"/>
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
    <Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
    <Setter Property="ItemsPanel">
        <Setter.Value>
            <ItemsPanelTemplate>
                <WrapPanel
                     IsItemsHost="True"
                     Width="{Binding
                              Path=ActualWidth,
                              RelativeSource={RelativeSource
                                  Mode=FindAncestor,
                                  AncestorType=
                                     {x:Type ScrollContentPresenter}}}" />
            </ItemsPanelTemplate>
        </Setter.Value>
    </Setter>
    <Setter Property="ItemTemplate">
        <Setter.Value>
            <DataTemplate>
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="80" />
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                    </Grid.ColumnDefinitions>
                    <Image Grid.Row="0" Source="{Binding ImageName}" Height="80" Stretch="Uniform"/>
                    <TextBlock Grid.Row="1" Text="{Binding Name}" TextWrapping="Wrap" TextTrimming="CharacterEllipsis"/>
                </Grid>
            </DataTemplate>
        </Setter.Value>
    </Setter>
</Style>

ListBox声明为：

<ListBox x:Name="lstCocktails" PreviewKeyDown="dg_PreviewKeyDown" ItemsSource="{Binding Source={StaticResource drinksSource}}" SelectedItem="{Binding SelectedItem,ElementName=root,Mode=TwoWay}" Style="{StaticResource CocktailGrid}"
             SelectionMode="Single" MouseDoubleClick="lstCocktails_MouseDoubleClick">

Snoop visual tree：

我已经在应用程序的其他部分覆盖了ItemsPanels，但出于某种原因，这个问题让我不知所措

Answer 1

使用此而不是ItemsTemplate

        <Setter Property="Template">
           <Setter.Value>
              <ControlTemplate TargetType="ListBox">
                 <Border Background="{TemplateBinding ListBox.Background}" CornerRadius="5">
                    <WrapPanel IsItemsHost="True"/>
                 </Border>
              </ControlTemplate>
           </Setter.Value>
        </Setter>

它有效

ItemsPanel模板无效

1 个答案: