我想更改所选项目的背景颜色。我尝试过以下解决方案,但没有成功。
<CollectionView x:Name="FlexCategoryType"
Margin="0"
HorizontalOptions="FillAndExpand"
ItemsSource="{Binding ItemsCategory}"
SelectedItem="{Binding SelectedCategory, Mode=TwoWay}"
SelectionChanged="FlexCategoryType_SelectionChanged"
SelectionMode="Single">
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout>
<Label Text="{Binding Name}" />
<VisualStateManager.VisualStateGroups>
<VisualStateGroup Name="CommonStates">
<VisualState Name="Normal" />
<VisualState Name="Selected">
<VisualState.Setters>
<Setter Property="BackgroundColor"
Value="Yellow" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
更改 CollectionView 中所选项目的背景颜色在 UWP 上不起作用
问题是你没有具体指定
CollectionView
SelectionMode
,默认值是none。请设置为Single
。并添加 VisualStateGroups
,如下所示
<CollectionView SelectionMode="Single">
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout Margin="10">
<Label Text="{Binding}" VerticalOptions="Center" />
<VisualStateManager.VisualStateGroups>
<VisualStateGroup Name="CommonStates">
<VisualState Name="Normal" />
<VisualState Name="Selected">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="Yellow" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
<CollectionView.ItemsSource>
<x:Array Type="{x:Type x:String}">
<x:String>1</x:String>
<x:String>2</x:String>
<x:String>3</x:String>
<x:String>4</x:String>
<x:String>5</x:String>
</x:Array>
</CollectionView.ItemsSource>
</CollectionView>
更新
如何更改
单元格选定的颜色。ListView
这是
FormsListViewItem
样式,请将其复制到UWP App.xaml
文件并编辑SelectedBackground
为您想要的颜色。
例如
<Application.Resources>
<ResourceDictionary>
<Style x:Key="FormsListViewItem" TargetType="ListViewItem">
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Foreground" Value="{ThemeResource SystemControlForegroundBaseHighBrush}" />
<Setter Property="TabNavigation" Value="Local" />
<Setter Property="IsHoldingEnabled" Value="True" />
<Setter Property="Padding" Value="0" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="MinWidth" Value="{ThemeResource ListViewItemMinWidth}" />
<Setter Property="MinHeight" Value="0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<ListViewItemPresenter
CheckBrush="{ThemeResource SystemControlForegroundBaseMediumHighBrush}"
ContentMargin="{TemplateBinding Padding}"
CheckMode="Inline"
ContentTransitions="{TemplateBinding ContentTransitions}"
CheckBoxBrush="{ThemeResource SystemControlForegroundBaseMediumHighBrush}"
DragForeground="{ThemeResource ListViewItemDragForegroundThemeBrush}"
DragOpacity="{ThemeResource ListViewItemDragThemeOpacity}"
DragBackground="{ThemeResource ListViewItemDragBackgroundThemeBrush}"
DisabledOpacity="{ThemeResource ListViewItemDisabledThemeOpacity}"
FocusBorderBrush="{ThemeResource SystemControlForegroundAltHighBrush}"
FocusSecondaryBorderBrush="{ThemeResource SystemControlForegroundBaseHighBrush}"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
PointerOverForeground="{ThemeResource SystemControlHighlightAltBaseHighBrush}"
PressedBackground="{ThemeResource SystemControlHighlightListMediumBrush}"
PlaceholderBackground="{ThemeResource ListViewItemPlaceholderBackgroundThemeBrush}"
PointerOverBackground="{ThemeResource SystemControlHighlightListLowBrush}"
ReorderHintOffset="{ThemeResource ListViewItemReorderHintThemeOffset}"
SelectedPressedBackground="{ThemeResource SystemControlHighlightListAccentHighBrush}"
SelectionCheckMarkVisualEnabled="True"
SelectedForeground="{ThemeResource SystemControlHighlightAltBaseHighBrush}"
SelectedPointerOverBackground="{ThemeResource SystemControlHighlightListAccentMediumBrush}"
SelectedBackground="SeaGreen"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
</Application.Resources>