Xaml UWP-无法更改CalendarDatePicker的占位符文本
我有一个Xaml UWP-无法更改CalendarDatePicker的占位符文本,xaml,uwp,Xaml,Uwp,我有一个CalendarDatePicker如下： <CalendarDatePicker Grid.Row="10" Grid.Column="0" Name="BirthdayPicker" PlaceholderText="{x:Bind View
CalendarDatePicker<CalendarDatePicker Grid.Row="10"
Grid.Column="0"
Name="BirthdayPicker"
PlaceholderText="{x:Bind ViewModel._FORM_dob, Mode=OneWay}"
HorizontalAlignment="Center"
Margin="0, 10, 0, 10"
DateFormat = "{}{year.full}-{month.integer}-{day.integer}"/>
即使这样也不会更改占位符文本。在调试期间，它显示占位符属性已更改，但未反映在UI中这是由于控件的默认样式设计不正确所致 在其内部，有一个名为
DateTextTextBlockTemplateBindingplaceholder text日期文本占位符文本TextBlock解决方案 因此，我对默认样式进行了一些修改，添加了一个新的
TextBlock占位符文本DateTextTemplateBinding所选可视状态中的一些可见性
更新
这是一份完整的副本供你参考
<Style TargetType="CalendarDatePicker">
<Setter Property="Foreground" Value="{ThemeResource CalendarDatePickerForeground}" />
<Setter Property="Background" Value="{ThemeResource CalendarDatePickerBackground}" />
<Setter Property="BorderBrush" Value="{ThemeResource CalendarDatePickerBorderBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource CalendarDatePickerBorderThemeThickness}" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="CalendarDatePicker">
<Grid x:Name="Root">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="32" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="32" />
</Grid.RowDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBorderBrushPointerOver}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBackgroundPointerOver}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBackgroundPressed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBorderBrushPressed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBackgroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBorderBrushDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerHeaderForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DateText"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerTextForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="CalendarGlyph"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerCalendarGlyphForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Unfocused" />
<VisualState x:Name="PointerFocused" />
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBackgroundFocused}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualState x:Name="Unselected" />
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Target="Placeholder.(UIElement.Visibility)"
Value="Collapsed" />
<Setter Target="DateText.(UIElement.Visibility)"
Value="Visible" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<FlyoutBase.AttachedFlyout>
<Flyout Placement="Bottom">
<Flyout.FlyoutPresenterStyle>
<Style TargetType="FlyoutPresenter">
<Setter Property="Padding"
Value="0" />
<Setter Property="BorderThickness"
Value="0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="FlyoutPresenter">
<ContentPresenter Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
ContentTransitions="{TemplateBinding ContentTransitions}"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Flyout.FlyoutPresenterStyle>
<CalendarView x:Name="CalendarView"
Style="{TemplateBinding CalendarViewStyle}"
MinDate="{TemplateBinding MinDate}"
MaxDate="{TemplateBinding MaxDate}"
IsTodayHighlighted="{TemplateBinding IsTodayHighlighted}"
DisplayMode="{TemplateBinding DisplayMode}"
FirstDayOfWeek="{TemplateBinding FirstDayOfWeek}"
DayOfWeekFormat="{TemplateBinding DayOfWeekFormat}"
CalendarIdentifier="{TemplateBinding CalendarIdentifier}"
IsOutOfScopeEnabled="{TemplateBinding IsOutOfScopeEnabled}"
IsGroupLabelVisible="{TemplateBinding IsGroupLabelVisible}" />
</Flyout>
</FlyoutBase.AttachedFlyout>
<ContentPresenter x:Name="HeaderContentPresenter"
x:DeferLoadStrategy="Lazy"
Margin="{ThemeResource ComboBoxHeaderThemeMargin}"
Visibility="Collapsed"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}"
TextWrapping="Wrap" />
<Border x:Name="Background"
Grid.Row="1"
Grid.ColumnSpan="2"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}"
Background="{TemplateBinding Background}" />
<TextBlock x:Name="DateText"
HorizontalAlignment="Left"
Foreground="{ThemeResource CalendarDatePickerTextForegroundSelected}"
Grid.Row="1"
FontSize="15"
Padding="12, 0, 0, 2"
VerticalAlignment="Center"
Visibility="Collapsed" />
<TextBlock x:Name="Placeholder"
HorizontalAlignment="Left"
Foreground="{ThemeResource CalendarDatePickerTextForeground}"
Text="{TemplateBinding PlaceholderText}"
Grid.Row="1"
FontSize="15"
Padding="12, 0, 0, 2"
VerticalAlignment="Center" />
<FontIcon x:Name="CalendarGlyph"
Glyph=""
FontFamily="{ThemeResource SymbolThemeFontFamily}"
Foreground="{ThemeResource CalendarDatePickerCalendarGlyphForeground}"
Grid.Row="1"
Grid.Column="1"
FontSize="16"
HorizontalAlignment="Center"
VerticalAlignment="Center" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
很抱歉，我无法测试它，很快就会进行测试。
<Style TargetType="CalendarDatePicker">
<Setter Property="Foreground" Value="{ThemeResource CalendarDatePickerForeground}" />
<Setter Property="Background" Value="{ThemeResource CalendarDatePickerBackground}" />
<Setter Property="BorderBrush" Value="{ThemeResource CalendarDatePickerBorderBrush}" />
<Setter Property="BorderThickness" Value="{ThemeResource CalendarDatePickerBorderThemeThickness}" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="CalendarDatePicker">
<Grid x:Name="Root">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="32" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="32" />
</Grid.RowDefinitions>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="PointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBorderBrushPointerOver}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBackgroundPointerOver}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Pressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBackgroundPressed}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBorderBrushPressed}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBackgroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="BorderBrush">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBorderBrushDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="HeaderContentPresenter"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerHeaderForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DateText"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerTextForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="CalendarGlyph"
Storyboard.TargetProperty="Foreground">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerCalendarGlyphForegroundDisabled}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Unfocused" />
<VisualState x:Name="PointerFocused" />
<VisualState x:Name="Focused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Background"
Storyboard.TargetProperty="Background">
<DiscreteObjectKeyFrame KeyTime="0"
Value="{ThemeResource CalendarDatePickerBackgroundFocused}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualState x:Name="Unselected" />
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Target="Placeholder.(UIElement.Visibility)"
Value="Collapsed" />
<Setter Target="DateText.(UIElement.Visibility)"
Value="Visible" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<FlyoutBase.AttachedFlyout>
<Flyout Placement="Bottom">
<Flyout.FlyoutPresenterStyle>
<Style TargetType="FlyoutPresenter">
<Setter Property="Padding"
Value="0" />
<Setter Property="BorderThickness"
Value="0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="FlyoutPresenter">
<ContentPresenter Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
ContentTransitions="{TemplateBinding ContentTransitions}"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Flyout.FlyoutPresenterStyle>
<CalendarView x:Name="CalendarView"
Style="{TemplateBinding CalendarViewStyle}"
MinDate="{TemplateBinding MinDate}"
MaxDate="{TemplateBinding MaxDate}"
IsTodayHighlighted="{TemplateBinding IsTodayHighlighted}"
DisplayMode="{TemplateBinding DisplayMode}"
FirstDayOfWeek="{TemplateBinding FirstDayOfWeek}"
DayOfWeekFormat="{TemplateBinding DayOfWeekFormat}"
CalendarIdentifier="{TemplateBinding CalendarIdentifier}"
IsOutOfScopeEnabled="{TemplateBinding IsOutOfScopeEnabled}"
IsGroupLabelVisible="{TemplateBinding IsGroupLabelVisible}" />
</Flyout>
</FlyoutBase.AttachedFlyout>
<ContentPresenter x:Name="HeaderContentPresenter"
x:DeferLoadStrategy="Lazy"
Margin="{ThemeResource ComboBoxHeaderThemeMargin}"
Visibility="Collapsed"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}"
TextWrapping="Wrap" />
<Border x:Name="Background"
Grid.Row="1"
Grid.ColumnSpan="2"
BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}"
Background="{TemplateBinding Background}" />
<TextBlock x:Name="DateText"
HorizontalAlignment="Left"
Foreground="{ThemeResource CalendarDatePickerTextForegroundSelected}"
Grid.Row="1"
FontSize="15"
Padding="12, 0, 0, 2"
VerticalAlignment="Center"
Visibility="Collapsed" />
<TextBlock x:Name="Placeholder"
HorizontalAlignment="Left"
Foreground="{ThemeResource CalendarDatePickerTextForeground}"
Text="{TemplateBinding PlaceholderText}"
Grid.Row="1"
FontSize="15"
Padding="12, 0, 0, 2"
VerticalAlignment="Center" />
<FontIcon x:Name="CalendarGlyph"
Glyph=""
FontFamily="{ThemeResource SymbolThemeFontFamily}"
Foreground="{ThemeResource CalendarDatePickerCalendarGlyphForeground}"
Grid.Row="1"
Grid.Column="1"
FontSize="16"
HorizontalAlignment="Center"
VerticalAlignment="Center" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>