问题
I want to have a dotted margin for Textbox if it is in Disabled state, My code looks like this
<Page.Resources>
<SolidColorBrush x:Key="TextBoxBackgroundThemeBrush" Color="#FFFFFFFF" />
<SolidColorBrush x:Key="TextBoxBorderThemeBrush" Color="#FFFFFFFF" />
<SolidColorBrush x:Key="TextBoxForegroundThemeBrush" Color="#FF000000" />
<SolidColorBrush x:Key="TextBoxForegroundHeaderThemeBrush" Color="#FFFFFFFF" />
<SolidColorBrush x:Key="TextBoxPlaceholderTextThemeBrush" Color="#AB000000" />
<SolidColorBrush x:Key="TextSelectionHighlightColorThemeBrush" Color="#FF4617B4"/>
<x:Double x:Key="TextControlThemeMinHeight">32</x:Double>
<x:Double x:Key="TextControlThemeMinWidth">64</x:Double>
<Thickness x:Key="TextControlBorderThemeThickness">2</Thickness>
<Thickness x:Key="TextControlThemePadding">10,3,10,5</Thickness>
<FontFamily x:Key="ContentControlThemeFontFamily">Segoe UI</FontFamily>
<x:Double x:Key="ControlContentThemeFontSize">14.667</x:Double>
<!-- Default style for Windows.UI.Xaml.Controls.TextBox -->
<Style TargetType="TextBox" x:Key="TextBoxStyle1">
<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="BorderBrush" Value="{ThemeResource TextBoxBorderThemeBrush}" />
<Setter Property="SelectionHighlightColor" Value="{ThemeResource TextSelectionHighlightColorThemeBrush}" />
<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="ScrollViewer.IsDeferredScrollingEnabled" Value="False" />
<Setter Property="Padding" Value="{ThemeResource TextControlThemePadding}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TextBox">
<Grid>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement"
Storyboard.TargetProperty="StrokeDashArray">
<DiscreteObjectKeyFrame KeyTime="0" Value="2,2" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</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"/>
<Line x:Name="BorderElement" Stroke="Red" X2="10000" Grid.Row="1" Grid.ColumnSpan="2" Grid.RowSpan="1"
Margin="0 39 0 0" StrokeThickness="2" StrokeDashCap="Round" />
<ContentPresenter x:Name="HeaderContentPresenter"
Grid.Row="0"
Foreground="{ThemeResource TextBoxForegroundHeaderThemeBrush}"
Margin="0,4,0,4"
Grid.ColumnSpan="2"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}"
/>
<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}"
IsDeferredScrollingEnabled="{TemplateBinding ScrollViewer.IsDeferredScrollingEnabled}"
Margin="{TemplateBinding BorderThickness}"
Padding="{TemplateBinding Padding}"
IsTabStop="False"
AutomationProperties.AccessibilityView="Raw"
ZoomMode="Disabled" />
<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"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="100"></RowDefinition>
</Grid.RowDefinitions>
<TextBox Height="40" Width="300" x:Name="txtDisabled" PlaceholderText="I'm Disabled" IsEnabled="False" Grid.Row="1" Style="{StaticResource TextBoxStyle1}" ></TextBox>
</Grid>
All looks good to me but this is not generating a dotted line, instead, it gives the complete normal line. As you can see I have set StrokeDashArray for BorderElement in Disabled state. If I give same StrokeDashArray directly to that Line (BorderElement) it is working fine (but in my case I want the dotted line only for disabled status). How can I achieve this?
回答1:
StrokeDashArray not working with VisualStateManager (UWP)
The problem is you missed Normal VisualState that will case the style could not change when switch TextBox IsEnabled property. please add <VisualState x:Name="Normal" /> into VisualStateGroup
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="BorderElement" Storyboard.TargetProperty="StrokeDashArray">
<DiscreteObjectKeyFrame KeyTime="0" Value="2,2" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
来源：https://stackoverflow.com/questions/61487391/strokedasharray-not-working-with-visualstatemanager-uwp