Когда в combobox будет больше элементов, combobox покажет всплывающее окно listpicker. Если я выбираю первый и прокручиваю вниз, будет отображено более одного элемента. Но SelectedItem of ComboBox будет тем, который я выбрал. Я изменил стиль ListPickerFlyout и отключил виртуализацию ListView. Если я это сделаю, ListView не сохранит SelectedItem. Это ошибка ComboBox? Есть ли решение для этой проблемы
Вот стиль, который я модифицировал
<DataTemplate x:Key="ListPickerFlyoutPresenterContentTemplate" >
<ListView VirtualizingStackPanel.VirtualizationMode="Recycling" SelectionMode="Single" >
<!--<ListView.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel/>
</ItemsPanelTemplate>
</ListView.ItemsPanel>-->
<ListView.ItemContainerStyle>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ListViewItem">
<Border x:Name="OuterContainer" RenderTransformOrigin="0.5,0.5">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="Pressed"/>
<VisualState x:Name="Disabled"/>
<VisualStateGroup.Transitions>
<VisualTransition From="Pressed" To="Normal" />
</VisualStateGroup.Transitions>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualState x:Name="Unselected" />
<VisualState x:Name="Selected">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Opacity" Duration="0" To="1" />
<DoubleAnimation Storyboard.TargetName="SelectedCheckMark" Storyboard.TargetProperty="Opacity" Duration="0" To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="Foreground" Duration="0">
<DiscreteObjectKeyFrame KeyTime="0" Value="Green" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListPickerFlyoutPresenterSelectedItemBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedUnfocused">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="CheckGlyph" Storyboard.TargetProperty="Opacity" Duration="0" To="1" />
<DoubleAnimation Storyboard.TargetName="SelectedCheckMark" Storyboard.TargetProperty="Opacity" Duration="0" To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="Foreground" Duration="0">
<DiscreteObjectKeyFrame KeyTime="0" Value="Green" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListPickerFlyoutPresenterSelectedItemBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="DataVirtualizationStates">
<VisualState x:Name="DataAvailable" />
<VisualState x:Name="DataPlaceholder">
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="MultiSelectStates">
<VisualState x:Name="NoMultiSelect" />
<VisualState x:Name="ListMultiSelect">
</VisualState>
<VisualState x:Name="GridMultiSelect" />
<VisualStateGroup.Transitions>
<VisualTransition From="ListMultiSelect" To="NoMultiSelect" GeneratedDuration="0:0:0.15" />
<VisualTransition From="NoMultiSelect" To="ListMultiSelect" GeneratedDuration="0:0:0.15" />
</VisualStateGroup.Transitions>
</VisualStateGroup>
<!--<VisualStateGroup x:Name="HighlightStates">
<VisualState x:Name="NoHighlight" />
<VisualState x:Name="Highlighted">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="contentPresenter" Storyboard.TargetProperty="Foreground" Duration="0">
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentBorder" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ListPickerFlyoutPresenterSelectedItemBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>-->
</VisualStateManager.VisualStateGroups>
<Grid>
<ContentPresenter x:Name="contentPresenter"
ContentTransitions="{TemplateBinding ContentTransitions}"
ContentTemplate="{TemplateBinding ContentTemplate}"
Content="{TemplateBinding Content}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Margin="{TemplateBinding Padding}"
Style="{ThemeResource FlyoutPickerListViewItemContentPresenterStyle}" />
<!--The 'Xg' text simulates the amount of space one line of text will occupy.
In the DataPlaceholder state, the Content is not loaded yet so we
approximate the size of the item using placeholder text.-->
<TextBlock x:Name="PlaceholderTextBlock"
Opacity="0"
Text="Xg"
Foreground="{x:Null}"
Margin="{TemplateBinding Padding}"
IsHitTestVisible="False"
AutomationProperties.AccessibilityView="Raw"/>
<Rectangle x:Name="PlaceholderRect"
Visibility="Collapsed"
Fill="{ThemeResource FlyoutBackgroundThemeBrush}"
IsHitTestVisible="False" />
</Grid>
</Border>
</Border>
</Border>
<Border x:Name="SelectedBorder"
IsHitTestVisible="False"
Opacity="0"
BorderBrush="{ThemeResource ListViewItemSelectedBackgroundThemeBrush}"
BorderThickness="{ThemeResource GridViewItemMultiselectBorderThickness}">
<Grid x:Name="SelectedCheckMark"
Opacity="0"
Height="34"
Width="34"
HorizontalAlignment="Right"
VerticalAlignment="Top">
<Path x:Name="SelectedEarmark" Data="M0,0 L40,0 L40,40 z"
Fill="{ThemeResource ListViewItemSelectedBackgroundThemeBrush}"
Stretch="Fill" />
<Path x:Name="SelectedGlyph"
Data="M0,123 L39,93 L124,164 L256,18 L295,49 L124,240 z"
Fill="{ThemeResource ListViewItemCheckThemeBrush}"
Height="14.5"
Stretch="Fill"
Width="17"
HorizontalAlignment="Right"
Margin="0,1,1,0"
VerticalAlignment="Top"
FlowDirection="LeftToRight" />
</Grid>
</Border>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
<ListView.Footer>
<Border Height="{ThemeResource ListPickerFlyoutFooterThemeHeight}" Width="1" />
</ListView.Footer>
</ListView>
</DataTemplate>
Когда я выбираю какой-то элемент, он не переходит в выбранное визуальное состояние, оно фактически переходит в выделенное визуальное состояние, и когда я отключу виртуализацию, предыдущее состояние подсветки не будет сохранено