如何删除UWP应用程序中组合框项目列表顶部和底部的边距集
在我的UWP应用程序中,我使用一个组合框,并尝试抑制放置在组合框项目顶部和底部的边距 通过查看,该边距似乎由以下值引导:ComboBoxDropdownContentMargin,设置为0,7,0,7 我为我的组合框创建了一个新样式,如下所示,但它根本不起作用(我的组合框消失了)。我尝试了很多其他的解决方案,但也没有结果如何删除UWP应用程序中组合框项目列表顶部和底部的边距集,uwp,uwp-xaml,Uwp,Uwp Xaml,在我的UWP应用程序中,我使用一个组合框,并尝试抑制放置在组合框项目顶部和底部的边距 通过查看,该边距似乎由以下值引导:ComboBoxDropdownContentMargin,设置为0,7,0,7 我为我的组合框创建了一个新样式,如下所示,但它根本不起作用(我的组合框消失了)。我尝试了很多其他的解决方案,但也没有结果 <Page.Resources> <Style x:Key="ComboBoxStyle1" TargetType="ComboBox">
<Page.Resources>
<Style x:Key="ComboBoxStyle1" TargetType="ComboBox">
<Setter Property="FontSize" Value="12"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Grid>
<Popup>
<Border>
<ScrollViewer>
<ItemsPresenter Margin="0,0,0,0"/>
</ScrollViewer>
</Border>
</Popup>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
我对UWP/XAML编码非常陌生,因此如果我的问题看起来很可笑,我很抱歉,但是有人能告诉我如何抑制模板放置的边距。创建一种新样式并更改
ItemsPresenter
是正确的。但是,当您重写“模板”设置器时,它将更新整个设置器,上面的代码只剩下ItemsPresenter
元素,但其他元素已消失,因此您无法看到组合框。完成此样式,并使用默认样式保持其他样式不变,则它将起作用。请按以下方式更新样式:
<Style x:Key="ComboBoxStyle1" TargetType="ComboBox">
<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>
<ContentPresenter
x:Name="HeaderContentPresenter"
Margin="{ThemeResource ComboBoxHeaderThemeMargin}"
FontWeight="{ThemeResource ComboBoxHeaderThemeFontWeight}"
x:DeferLoadStrategy="Lazy"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}"
FlowDirection="{TemplateBinding FlowDirection}"
Visibility="Collapsed" />
<Border
x:Name="Background"
Grid.Row="1"
Grid.ColumnSpan="2"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}" />
<Border
x:Name="HighlightBackground"
Grid.Row="1"
Grid.ColumnSpan="2"
Background="{ThemeResource SystemControlHighlightListAccentLowBrush}"
BorderBrush="{ThemeResource SystemControlHighlightBaseMediumLowBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Opacity="0" />
<ContentPresenter
x:Name="ContentPresenter"
Grid.Row="1"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
<TextBlock
x:Name="PlaceholderTextBlock"
Foreground="{ThemeResource SystemControlPageTextBaseHighBrush}"
Text="{TemplateBinding PlaceholderText}" />
</ContentPresenter>
<FontIcon
x:Name="DropDownGlyph"
Grid.Row="1"
Grid.Column="1"
Margin="0,10,10,10"
HorizontalAlignment="Right"
VerticalAlignment="Center"
Foreground="{ThemeResource SystemControlForegroundBaseMediumHighBrush}"
FontFamily="{ThemeResource SymbolThemeFontFamily}"
FontSize="12"
AutomationProperties.AccessibilityView="Raw"
Glyph=""
IsHitTestVisible="False" />
<Popup x:Name="Popup">
<Border
x:Name="PopupBorder"
Margin="0,-1,0,-1"
HorizontalAlignment="Stretch"
Background="{ThemeResource SystemControlBackgroundChromeMediumLowBrush}"
BorderBrush="{ThemeResource SystemControlForegroundChromeHighBrush}"
BorderThickness="{ThemeResource ComboBoxDropdownBorderThickness}">
<ScrollViewer
x:Name="ScrollViewer"
MinWidth="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownContentMinWidth}"
Foreground="{ThemeResource SystemControlForegroundBaseHighBrush}"
AutomationProperties.AccessibilityView="Raw"
BringIntoViewOnFocusChange="{TemplateBinding ScrollViewer.BringIntoViewOnFocusChange}"
HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}"
IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}"
IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}"
IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}"
VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}"
VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}"
VerticalSnapPointsAlignment="Near"
VerticalSnapPointsType="OptionalSingle"
ZoomMode="Disabled">
<ItemsPresenter Margin="0"/>
</ScrollViewer>
</Border>
</Popup>
<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 SystemControlPageBackgroundAltMediumBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightBaseMediumBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlBackgroundListMediumBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlBackgroundBaseLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextBlock" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HighlightBackground" Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation
Duration="0"
Storyboard.TargetName="HighlightBackground"
Storyboard.TargetProperty="Opacity"
To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextBlock" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="FocusedPressed">
<Storyboard>
<DoubleAnimation
Duration="0"
Storyboard.TargetName="HighlightBackground"
Storyboard.TargetProperty="Opacity"
To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextBlock" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DropDownGlyph" Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unfocused" />
<VisualState x:Name="PointerFocused" />
<VisualState x:Name="FocusedDropDown">
<Storyboard>
<ObjectAnimationUsingKeyFrames
Duration="0"
Storyboard.TargetName="PopupBorder"
Storyboard.TargetProperty="Visibility">
<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
ClosedTargetName="ContentPresenter"
OffsetFromCenter="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOffset}"
OpenedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOpenedHeight}"
OpenedTargetName="PopupBorder" />
</Storyboard>
</VisualState>
<VisualState x:Name="Closed">
<Storyboard>
<SplitCloseThemeAnimation
ClosedTargetName="ContentPresenter"
OffsetFromCenter="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOffset}"
OpenedLength="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TemplateSettings.DropDownOpenedHeight}"
OpenedTargetName="PopupBorder" />
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
看得见的