c# - 我们可以更改 ListBox 的选定项颜色吗？

Question

所以，我ListBox用 XAML 写了这个：

<ListBox Margin="0" x:Name="ListBox_Main" Grid.Row="1" VerticalAlignment="Top" FontSize="24" SelectionChanged="ListBox_Main_SelectionChanged" Foreground="Black">
     <ListBoxItem Content="Item 1" Background="#19000000" />
     <ListBoxItem Content="Item 2" Background="#19000000" />
     <ListBoxItem Content="Item 3" Background="#19000000" />
     <ListBoxItem Content="Item 4" Background="#19000000"/> 
     <ListBoxItem Content="Item 5" Background="#19000000"/>
 </ListBox>

I can change the color of background, foreground, and the text of the list box items but there's no option to change the color when any of the items is selected, it is blue by default:

我们可以改变那个蓝色吗？

Answer 1

您需要根据ListBoxItem您的要求更改默认样式模板。MSDN 参考

<Style TargetType="ListBoxItem">
  <Setter Property="Padding" Value="3" />
  <Setter Property="HorizontalContentAlignment" Value="Left" />
  <Setter Property="VerticalContentAlignment" Value="Top" />
  <Setter Property="Background" Value="Transparent" />
  <Setter Property="BorderThickness" Value="1"/>
  <Setter Property="TabNavigation" Value="Local" />
  <Setter Property="Template">
      <Setter.Value>
          <ControlTemplate TargetType="ListBoxItem">
              <Grid Background="{TemplateBinding Background}">
                  <vsm:VisualStateManager.VisualStateGroups>
                      <vsm:VisualStateGroup x:Name="CommonStates">
                          <vsm:VisualState x:Name="Normal" />
                          <vsm:VisualState x:Name="MouseOver">
                              <Storyboard>
                                  <DoubleAnimation Storyboard.TargetName="fillColor" Storyboard.TargetProperty="Opacity" Duration="0" To=".35"/>
                              </Storyboard>
                          </vsm:VisualState>
                          <vsm:VisualState x:Name="Disabled">
                              <Storyboard>
                                  <DoubleAnimation Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="Opacity" Duration="0" To=".55" />
                              </Storyboard>
                          </vsm:VisualState>
                      </vsm:VisualStateGroup>
                      <vsm:VisualStateGroup x:Name="SelectionStates">
                          <vsm:VisualState x:Name="Unselected" />
                          <vsm:VisualState x:Name="Selected">
                              <Storyboard>
                                  <DoubleAnimation Storyboard.TargetName="fillColor2" Storyboard.TargetProperty="Opacity" Duration="0" To=".75"/>
                              </Storyboard>
                          </vsm:VisualState>
                      </vsm:VisualStateGroup>
                      <vsm:VisualStateGroup x:Name="FocusStates">
                          <vsm:VisualState x:Name="Focused">
                              <Storyboard>
                                  <ObjectAnimationUsingKeyFrames Storyboard.TargetName="FocusVisualElement" Storyboard.TargetProperty="Visibility" Duration="0">
                                      <DiscreteObjectKeyFrame KeyTime="0">
                                          <DiscreteObjectKeyFrame.Value>
                                              <Visibility>Visible</Visibility>
                                          </DiscreteObjectKeyFrame.Value>
                                      </DiscreteObjectKeyFrame>
                                  </ObjectAnimationUsingKeyFrames>
                              </Storyboard>
                          </vsm:VisualState>
                          <vsm:VisualState x:Name="Unfocused"/>
                      </vsm:VisualStateGroup>
                  </vsm:VisualStateManager.VisualStateGroups>
                  <Rectangle x:Name="fillColor" Opacity="0" Fill="#FFBADDE9" IsHitTestVisible="False" RadiusX="1" RadiusY="1"/>
                  <Rectangle x:Name="fillColor2" Opacity="0" Fill="#FFBADDE9" IsHitTestVisible="False" RadiusX="1" RadiusY="1"/>
                  <ContentPresenter
                          x:Name="contentPresenter"
                          Content="{TemplateBinding Content}"
                          ContentTemplate="{TemplateBinding ContentTemplate}"
                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                          Margin="{TemplateBinding Padding}"/>
                  <Rectangle x:Name="FocusVisualElement" Stroke="#FF6DBDD1" StrokeThickness="1" Visibility="Collapsed" RadiusX="1" RadiusY="1" />
              </Grid>
          </ControlTemplate>
      </Setter.Value>
  </Setter>
</Style>

您还可以查看此链接，格式化选定 WPF 列表框项的背景颜色以供参考。