Windows 商店 PasswordBox - VerticalContentAlignment 不起作用答案

【问题标题】：Windows store PasswordBox - VerticalContentAlignment does not workWindows 商店 PasswordBox - VerticalContentAlignment 不起作用
【发布时间】：2014-06-02 02:32:49
【问题描述】：

我尝试将 PasswordBox 添加到我的 XAML/C# Windows 商店应用程序中。我为此 PasswordBox 创建了样式，但 VerticalContentAlignment 被忽略了，并且 PasswordBox 的内容显示在顶部。

这是我的 PassworBox 风格：

<Style TargetType="PasswordBox" >
    <Setter Property="Height" Value="40"/>
    <Setter Property="Width" Value="150"/>
    <Setter Property="Background" Value="#cccccc"/>
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="HorizontalContentAlignment" Value="Center"/>
    <Setter Property="BorderThickness" Value="0"/>
    <Setter Property="BorderBrush" Value="#cccccc"/>        
</Style>

我找到了许多解决方案（主要用于经典 WPF 或 Silverlight），但没有任何帮助。你知道如何处理它吗？谢谢。

【问题讨论】：

我尝试了PasswordBox 的样式，对我来说（VS2013、Windows 8、.NET Framework 4.5），密码在垂直和水平方向都居中显示。请说明您如何将样式应用于 PasswordBox，并显示在 PasswordBox 上设置的任何其他属性。
我使用的是相同的配置。样式会自动应用于所有密码框（我看到它是因为颜色等）。我尝试直接在 PasswordBox 上设置此属性，但它仍然相同。我的 PasswordBox 看起来很简单：<PasswordBox Password="{Binding Password}" Grid.Row="2" />
这是我的情况：Screenshot

标签： wpf windows-store-apps winrt-xaml

【解决方案1】：

查看PasswordBox Styles and Templates，PasswordBox 的默认模板似乎没有ContentControl（在ScrollViewer 的情况下）响应VerticalContentAlignment 更改的更改。我试图用下面的方式来缓解这种情况。

我相信默认样式是高度为 32 而不是 40 的 PasswordBox 居中。您可能还需要更改 Padding 值以使其进一步居中。

<!-- Taken from the Default style for Windows.UI.Xaml.Controls.PasswordBox -->
<Style TargetType="PasswordBox">
    <Setter Property="MinWidth" Value="{ThemeResource TextControlThemeMinWidth}" />
    <Setter Property="MinHeight" Value="{ThemeResource TextControlThemeMinHeight}" />
    <Setter Property="Foreground" Value="{ThemeResource TextBoxForegroundThemeBrush}" />
    <Setter Property="Background" Value="{ThemeResource TextBoxBackgroundThemeBrush}" />
    <Setter Property="SelectionHighlightColor" Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
    <Setter Property="BorderBrush" Value="{ThemeResource TextBoxBorderThemeBrush}" />
    <Setter Property="BorderThickness" Value="{ThemeResource TextControlBorderThemeThickness}" />
    <Setter Property="FontFamily" Value="{ThemeResource ContentControlThemeFontFamily}" />
    <Setter Property="FontSize" Value="{ThemeResource ControlContentThemeFontSize}" />
    <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden" />
    <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Hidden" />
    <Setter Property="Padding" Value="{ThemeResource TextControlThemePadding}"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="PasswordBox">
                <Grid>
                    <Grid.Resources>
                        <Style x:Name="RevealButtonStyle" TargetType="Button">
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate TargetType="Button">
                                        <Grid>
                                            <VisualStateManager.VisualStateGroups>
                                                <VisualStateGroup x:Name="CommonStates">
                                                    <VisualState x:Name="Normal" />
                                                    <VisualState x:Name="PointerOver">
                                                        <Storyboard>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundElement"
                                                                                           Storyboard.TargetProperty="Background">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPointerOverBackgroundThemeBrush}" />
                                                            </ObjectAnimationUsingKeyFrames>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
                                                                                           Storyboard.TargetProperty="BorderBrush">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPointerOverBorderThemeBrush}" />
                                                            </ObjectAnimationUsingKeyFrames>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="GlyphElement"
                                                                                           Storyboard.TargetProperty="Foreground">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPointerOverForegroundThemeBrush}" />
                                                            </ObjectAnimationUsingKeyFrames>
                                                        </Storyboard>
                                                    </VisualState>
                                                    <VisualState x:Name="Pressed">
                                                        <Storyboard>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundElement"
                                                                                           Storyboard.TargetProperty="Background">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPressedBackgroundThemeBrush}" />
                                                            </ObjectAnimationUsingKeyFrames>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
                                                                                           Storyboard.TargetProperty="BorderBrush">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPressedBorderThemeBrush}" />
                                                            </ObjectAnimationUsingKeyFrames>
                                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="GlyphElement"
                                                                                           Storyboard.TargetProperty="Foreground">
                                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxButtonPressedForegroundThemeBrush}" />
                                                            </ObjectAnimationUsingKeyFrames>
                                                        </Storyboard>
                                                    </VisualState>
                                                    <VisualState x:Name="Disabled">
                                                        <Storyboard>
                                                            <DoubleAnimation Storyboard.TargetName="BackgroundElement"
                                                                             Storyboard.TargetProperty="Opacity"
                                                                             To="0"
                                                                             Duration="0" />
                                                            <DoubleAnimation Storyboard.TargetName="BorderElement"
                                                                             Storyboard.TargetProperty="Opacity"
                                                                             To="0"
                                                                             Duration="0" />
                                                        </Storyboard>
                                                    </VisualState>
                                                </VisualStateGroup>
                                            </VisualStateManager.VisualStateGroups>
                                            <Border x:Name="BorderElement"
                                                    BorderBrush="{ThemeResource TextBoxButtonBorderThemeBrush}"
                                                    BorderThickness="{TemplateBinding BorderThickness}"/>
                                            <Border x:Name="BackgroundElement"
                                                    Background="{ThemeResource TextBoxButtonBackgroundThemeBrush}"
                                                    Margin="{TemplateBinding BorderThickness}">
                                                <TextBlock x:Name="GlyphElement"
                                                           Foreground="{ThemeResource TextBoxButtonForegroundThemeBrush}"
                                                           VerticalAlignment="Center"
                                                           HorizontalAlignment="Center"
                                                           FontStyle="Normal"
                                                           Text="&#xE052;"
                                                           FontFamily="{ThemeResource SymbolThemeFontFamily}"
                                                           AutomationProperties.AccessibilityView="Raw"/>
                                            </Border>
                                        </Grid>
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style>
                    </Grid.Resources>
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="CommonStates">
                            <VisualState x:Name="Disabled">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BackgroundElement"
                                                                   Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledBackgroundThemeBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
                                                                   Storyboard.TargetProperty="BorderBrush">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledBorderThemeBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentElement"
                                                                   Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PlaceholderTextContentPresenter"
                                                                   Storyboard.TargetProperty="Foreground">
                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextBoxDisabledForegroundThemeBrush}" />
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Normal">
                                <Storyboard>
                                    <DoubleAnimation Storyboard.TargetName="BackgroundElement"
                                                     Storyboard.TargetProperty="Opacity"
                                                     Duration="0"
                                                     To="{ThemeResource TextControlBackgroundThemeOpacity}" />
                                    <DoubleAnimation Storyboard.TargetName="BorderElement"
                                                     Storyboard.TargetProperty="Opacity"
                                                     Duration="0"
                                                     To="{ThemeResource TextControlBorderThemeOpacity}" />
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="PointerOver">
                                <Storyboard>
                                    <DoubleAnimation Storyboard.TargetName="BackgroundElement"
                                                     Storyboard.TargetProperty="Opacity"
                                                     Duration="0"
                                                     To="{ThemeResource TextControlPointerOverBackgroundThemeOpacity}" />
                                    <DoubleAnimation Storyboard.TargetName="BorderElement"
                                                     Storyboard.TargetProperty="Opacity"
                                                     Duration="0"
                                                     To="{ThemeResource TextControlPointerOverBorderThemeOpacity}" />
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Focused" />
                        </VisualStateGroup>
                        <VisualStateGroup x:Name="ButtonStates">
                            <VisualState x:Name="ButtonVisible">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="RevealButton"
                                                                   Storyboard.TargetProperty="Visibility">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <Visibility>Visible</Visibility>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="ButtonCollapsed" />
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto" />
                        <RowDefinition Height="*" />
                    </Grid.RowDefinitions>
                    <Border x:Name="BackgroundElement"
                            Grid.Row="1"
                            Background="{TemplateBinding Background}"
                            Margin="{TemplateBinding BorderThickness}"
                            Grid.ColumnSpan="2"
                            Grid.RowSpan="1"/>
                    <Border x:Name="BorderElement"
                            Grid.Row="1"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            Grid.ColumnSpan="2"
                            Grid.RowSpan="1"/>
                    <ContentPresenter x:Name="HeaderContentPresenter"
                                      Grid.Row="0"
                                      Foreground="{ThemeResource TextBoxForegroundHeaderThemeBrush}"
                                      Margin="0,4,0,4"
                                      Grid.ColumnSpan="2"
                                      Content="{TemplateBinding Header}"
                                      ContentTemplate="{TemplateBinding HeaderTemplate}"
                                      FontWeight="Semilight" />
                    <ScrollViewer x:Name="ContentElement"
                            Grid.Row="1"
                                  HorizontalScrollMode="{TemplateBinding ScrollViewer.HorizontalScrollMode}"
                                  HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
                                  VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}"
                                  VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}"
                                  IsHorizontalRailEnabled="{TemplateBinding ScrollViewer.IsHorizontalRailEnabled}"
                                  IsVerticalRailEnabled="{TemplateBinding ScrollViewer.IsVerticalRailEnabled}"
                                  VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                                  HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                  Margin="{TemplateBinding BorderThickness}"
                                  Padding="{TemplateBinding Padding}"
                                  IsTabStop="False"
                                  ZoomMode="Disabled"
                                  AutomationProperties.AccessibilityView="Raw"/>
                    <ContentControl x:Name="PlaceholderTextContentPresenter"
                                  Grid.Row="1"
                                  Foreground="{ThemeResource TextBoxPlaceholderTextThemeBrush}"
                                  Margin="{TemplateBinding BorderThickness}"
                                  Padding="{TemplateBinding Padding}"
                                  IsTabStop="False"
                                  Grid.ColumnSpan="2"
                                  Content="{TemplateBinding PlaceholderText}" 
                                  IsHitTestVisible="False"/>
                    <Button x:Name="RevealButton"
                            Grid.Row="1"
                            Style="{StaticResource RevealButtonStyle}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            IsTabStop="False"
                            Grid.Column="1"
                            Visibility="Collapsed"
                            FontSize="{TemplateBinding FontSize}"
                            VerticalAlignment="Stretch"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

注意：我还没有机会尝试这个，这充其量只是一个有根据的猜测。可能仍需要进行一些调整才能按预期工作。

希望这对编码有所帮助！

【讨论】：