在GridView内的ListViewItemPresenter中更改SelectedBackground,可以通过自定义样式来实现。
首先,我们需要创建一个新的样式,并将其应用于GridView的ItemContainerStyle属性。在这个样式中,我们可以修改ListViewItemPresenter的模板以更改SelectedBackground。
以下是一个示例样式:
<Style x:Key="CustomGridViewItemStyle" TargetType="GridViewItem">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Padding" Value="0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="GridViewItem">
<ListViewItemPresenter
ContentTransitions="{TemplateBinding ContentTransitions}"
SelectionCheckMarkVisualEnabled="True"
CheckBrush="{ThemeResource SystemControlForegroundBaseMediumHighBrush}"
CheckBoxBrush="{ThemeResource SystemControlForegroundBaseMediumHighBrush}"
DragBackground="{ThemeResource ListViewItemDragBackgroundThemeBrush}"
DragForeground="{ThemeResource ListViewItemDragForegroundThemeBrush}"
FocusBorderBrush="{ThemeResource SystemControlForegroundAltHighBrush}"
FocusSecondaryBorderBrush="{ThemeResource SystemControlForegroundBaseHighBrush}"
PlaceholderBackground="{ThemeResource ListViewItemPlaceholderBackgroundThemeBrush}"
PointerOverBackground="{ThemeResource SystemControlHighlightListLowBrush}"
PointerOverForeground="{ThemeResource SystemControlHighlightAltBaseHighBrush}"
SelectedBackground="{ThemeResource SystemControlHighlightListAccentLowBrush}"
SelectedForeground="{ThemeResource SystemControlHighlightAltBaseHighBrush}"
SelectedPointerOverBackground="{ThemeResource SystemControlHighlightListAccentMediumBrush}"
PressedBackground="{ThemeResource SystemControlHighlightListAccentHighBrush}"
SelectedPressedBackground="{ThemeResource SystemControlHighlightListAccentMediumBrush}"
DisabledOpacity="{ThemeResource ListViewItemDisabledThemeOpacity}"
DragOpacity="{ThemeResource ListViewItemDragThemeOpacity}"
ReorderHintOffset="{ThemeResource ListViewItemReorderHintThemeOffset}"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
ContentMargin="{TemplateBinding Padding}"
CheckMode="Inline"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
然后,将这个样式应用于GridView的ItemContainerStyle属性:
<GridView ItemContainerStyle="{StaticResource CustomGridViewItemStyle}">
<!-- GridView的内容 -->
</GridView>
通过使用这个自定义样式,你可以更改SelectedBackground的外观。你可以根据自己的需求修改SelectedBackground的颜色、形状等。
请注意,这个示例中使用的是默认的系统主题资源,你可以根据自己的应用程序主题进行调整。
希望这个答案能够满足你的需求。如果你需要更多帮助,请随时提问。
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