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c# - ComboBox-> 在右侧添加这个小三角形

转载 作者:太空宇宙 更新时间:2023-11-03 15:39:12 26 4
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当在 WindowsPhone 应用程序的 xaml 中使用标准 ComboBox 时,您会得到 ComboBox ,它看起来不像旧样式 ComboBox 即它没有右边这个小三角形。

任何人都可以给我举个例子,或者给我一个提示或解决方案:

我们如何将这个小三角形添加到 ComboBox 控件中。

我只需要让 ComboBox 看起来像:

enter image description here

谢谢!

这是我使用的代码:

<Page
x:Class="ComboBoxCustom.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:ComboBoxCustom"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

<Page.Resources>
<Style TargetType="ComboBox">
<Setter Property="Padding" Value="8,0" />
<Setter Property="MinWidth" Value="{ThemeResource ComboBoxThemeMinWidth}" />
<Setter Property="Foreground" Value="{ThemeResource ComboBoxForegroundThemeBrush}" />
<Setter Property="Background" Value="{ThemeResource ComboBoxBackgroundThemeBrush}" />
<Setter Property="BorderBrush" Value="{ThemeResource ComboBoxBorderThemeBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource ComboBoxBorderThemeThickness}" />
<Setter Property="TabNavigation" Value="Once" />
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
<Setter Property="ScrollViewer.HorizontalScrollMode" Value="Disabled" />
<Setter Property="ScrollViewer.VerticalScrollMode" Value="Auto" />
<Setter Property="ScrollViewer.IsVerticalRailEnabled" Value="True" />
<Setter Property="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />
<Setter Property="ScrollViewer.BringIntoViewOnFocusChange" Value="True" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
<Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}" />

<Setter Property="ItemsPanel">
<Setter.Value>
<ItemsPanelTemplate>
<CarouselPanel />
</ItemsPanelTemplate>
</Setter.Value>
</Setter>

<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBox">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>

<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="32" />
</Grid.ColumnDefinitions>

<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxPointerOverBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxPointerOverBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Highlight"
Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxSelectedPointerOverBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxPressedBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxPressedBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxPressedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="PressedBackground"
Storyboard.TargetProperty="Opacity"
To="1"
Duration="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxArrowPressedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxDisabledBackgroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxDisabledBorderThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxArrowDisabledForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="HighlightBackground"
Storyboard.TargetProperty="Opacity"
To="1"
Duration="0" />
<DoubleAnimation Storyboard.TargetName="Highlight"
Storyboard.TargetProperty="Opacity"
To="1"
Duration="0" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxFocusedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="FocusedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxPressedForegroundThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Highlight"
Storyboard.TargetProperty="Fill">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ComboBoxPressedHighlightThemeBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused" />
<VisualState x:Name="PointerFocused" />
<VisualState x:Name="FocusedDropDown">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PopupBorder"
Storyboard.TargetProperty="Visibility"
Duration="0">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="DropDownStates">
<VisualState x:Name="Opened">
<Storyboard>
<SplitOpenThemeAnimation
OpenedTargetName="PopupBorder"
ContentTargetName="ScrollViewer"
ClosedTargetName="ContentPresenter"
ContentTranslationOffset="0"
OffsetFromCenter="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOffset}"
OpenedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOpenedHeight}"
ClosedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownClosedHeight}" />
</Storyboard>
</VisualState>
<VisualState x:Name="Closed">
<Storyboard>
<SplitCloseThemeAnimation
OpenedTargetName="PopupBorder"
ContentTargetName="ScrollViewer"
ClosedTargetName="ContentPresenter"
ContentTranslationOffset="40"
OffsetFromCenter="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOffset}"
ContentTranslationDirection="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.SelectedItemDirection}"
OpenedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOpenedHeight}"
ClosedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownClosedHeight}" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>

<ContentPresenter x:Name="HeaderContentPresenter"
Foreground="{ThemeResource ComboBoxHeaderForegroundThemeBrush}"
Margin="{ThemeResource ComboBoxHeaderThemeMargin}"
FlowDirection="{TemplateBinding FlowDirection}"
FontWeight="{ThemeResource ComboBoxHeaderThemeFontWeight}"
Visibility="Collapsed"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}" />

<Border x:Name="Background"
Grid.Row="1"
Grid.ColumnSpan="2"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}" />

<Rectangle x:Name="PressedBackground"
Grid.Row="1"
Fill="{ThemeResource ComboBoxPressedHighlightThemeBrush}"
Margin="{TemplateBinding BorderThickness}"
Opacity="0" />

<Border x:Name="HighlightBackground"
Grid.Row="1"
Grid.ColumnSpan="2"
Background="{ThemeResource ComboBoxFocusedBackgroundThemeBrush}"
BorderBrush="{ThemeResource ComboBoxFocusedBorderThemeBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Opacity="0" />

<Rectangle x:Name="Highlight"
Grid.Row="1"
Fill="{ThemeResource ComboBoxSelectedBackgroundThemeBrush}"
Margin="{TemplateBinding BorderThickness}"
Opacity="0" />

<ContentPresenter x:Name="ContentPresenter"
Grid.Row="1"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}">

<TextBlock x:Name="PlaceholderTextBlock"
Text="{TemplateBinding PlaceholderText}"
Foreground="{ThemeResource ComboBoxPlaceholderTextForegroundThemeBrush}"
FontWeight="{ThemeResource ComboBoxPlaceholderTextThemeFontWeight}"/>

</ContentPresenter>

<TextBlock x:Name="DropDownGlyph"
Text="&#57361;"
Grid.Row="1"
Grid.Column="1"
IsHitTestVisible="False"
Margin="0,0,6,4"
Foreground="{ThemeResource ComboBoxArrowForegroundThemeBrush}"
FontWeight="Bold"
FontSize="{ThemeResource ComboBoxArrowThemeFontSize}"
FontFamily="{ThemeResource SymbolThemeFontFamily}"
HorizontalAlignment="Right"
VerticalAlignment="Center"
AutomationProperties.AccessibilityView="Raw"/>

<Popup x:Name="Popup">
<Border x:Name="PopupBorder"
Background="{ThemeResource ComboBoxPopupBackgroundThemeBrush}"
BorderBrush="{ThemeResource ComboBoxPopupBorderThemeBrush}"
BorderThickness="{ThemeResource ComboBoxPopupBorderThemeThickness}"
HorizontalAlignment="Stretch">

<ScrollViewer x:Name="ScrollViewer" Foreground="{ThemeResource ComboBoxPopupForegroundThemeBrush}"
MinWidth="{ThemeResource ComboBoxPopupThemeMinWidth}"
VerticalSnapPointsType="OptionalSingle"
VerticalSnapPointsAlignment="Near"
HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}"
HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}"
VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}"
IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}"
IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}"
IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}"
BringIntoViewOnFocusChange="{TemplateBinding ScrollViewer.BringIntoViewOnFocusChange}"
ZoomMode="Disabled"
AutomationProperties.AccessibilityView="Raw">
<ItemsPresenter/>
</ScrollViewer>
</Border>
</Popup>

</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>


<Grid>
<ComboBox Header="asdswd"
Height="100">
<ComboBox.Items>
<TextBox Text="AAA"/>
<TextBox Text="BBB"/>
</ComboBox.Items>

</ComboBox>


</Grid>
</Page>

最佳答案

这是 Windows Phone ComboBox 的默认样式:

https://msdn.microsoft.com/en-us/library/windows/apps/xaml/jj709912.aspx

x:name="DropDownGlyph"就是您要查找的内容。看起来您要显示的符号是 。如果它没有出现,则可能是您正在使用的其他地方的样式覆盖了默认值。

关于c# - ComboBox-> 在右侧添加这个小三角形,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30805474/

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