我正在开发一个带有样式TabControl的WPF应用程序。 我们需要根据用户选择显示/隐藏TabControl。为此，我将TabControl的Visibility设置为Collapsed，然后在需要时再次设置为Visible。
我面临的问题是，当我隐藏TabControl并再次显示它时，TabHeader中的文本将恢复为原始颜色。 此外，我注意到TabHeaders中所有文本的样式/颜色似乎都重置了。
这是TabControl和TabHeader的样式：
<Style x:Key="g_TabControlStyle" TargetType="{x:Type TabControl}">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="Padding" Value="4,4,4,4"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="BorderBrush" Value="{StaticResource TabControlNormalBorderBrush}"/>
<Setter Property="Background" Value="{StaticResource TabControlPaneTopNormalBackground}"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabControl}">
<Grid ClipToBounds="true" SnapsToDevicePixels="true" KeyboardNavigation.TabNavigation="Local">
<Grid.ColumnDefinitions>
<ColumnDefinition x:Name="ColumnDefinition0"/>
<ColumnDefinition x:Name="ColumnDefinition1" Width="0"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition x:Name="RowDefinition0" Height="Auto"/>
<RowDefinition x:Name="RowDefinition1" Height="*"/>
</Grid.RowDefinitions>
<TabPanel x:Name="HeaderPanel" Grid.Column="0" IsItemsHost="true" Margin="0,2,2,0" Grid.Row="0" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1"/>
<Border x:Name="ContentPanel" BorderThickness="0,0,1,1" Grid.Column="0" KeyboardNavigation.DirectionalNavigation="Contained" Grid.Row="1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local">
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
<Border Background="{TemplateBinding Background}">
<ContentPresenter x:Name="PART_SelectedContentHost" ContentSource="SelectedContent" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Border>
</Border>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="TabStripPlacement" Value="Bottom">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="1"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="Auto"/>
<Setter Property="Margin" TargetName="HeaderPanel" Value="0,0,2,2"/>
<Setter Property="Background" Value="{StaticResource TabControlPaneBottomNormalBackground}"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Left">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="ContentPanel" Value="1"/>
<Setter Property="Width" TargetName="ColumnDefinition0" Value="Auto"/>
<Setter Property="Width" TargetName="ColumnDefinition1" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="0"/>
<Setter Property="Margin" TargetName="HeaderPanel" Value="2,2,-1,2"/>
<Setter Property="Background" Value="{StaticResource TabControlPaneLeftNormalBackground}"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Right">
<Setter Property="Grid.Row" TargetName="HeaderPanel" Value="0"/>
<Setter Property="Grid.Row" TargetName="ContentPanel" Value="0"/>
<Setter Property="Grid.Column" TargetName="HeaderPanel" Value="1"/>
<Setter Property="Grid.Column" TargetName="ContentPanel" Value="0"/>
<Setter Property="Width" TargetName="ColumnDefinition0" Value="*"/>
<Setter Property="Width" TargetName="ColumnDefinition1" Value="Auto"/>
<Setter Property="Height" TargetName="RowDefinition0" Value="*"/>
<Setter Property="Height" TargetName="RowDefinition1" Value="0"/>
<Setter Property="Margin" TargetName="HeaderPanel" Value="-1,2,2,2"/>
<Setter Property="Background" Value="{StaticResource TabControlPaneRightNormalBackground}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="g_TabItemStyle" TargetType="{x:Type TabItem}">
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Padding" Value="12,2,12,2"/>
<Setter Property="BorderThickness" Value="1,1,1,0"/>
<Setter Property="BorderBrush" Value="{StaticResource TabControlNormalBorderBrush}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="Background" Value="{StaticResource TabItemNormalBackground}"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Border SnapsToDevicePixels="true" MinWidth="90" MaxWidth="190">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="MouseOver"/>
<VisualState x:Name="Disabled"/>
</VisualStateGroup>
<VisualStateGroup x:Name="SelectionStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="Unselected">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="border1">
<EasingDoubleKeyFrame KeyTime="0" Value="0.2"/>
</DoubleAnimationUsingKeyFrames>
<ColorAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground.Color" Storyboard.TargetName="contentPresenter">
<EasingColorKeyFrame KeyTime="0" Value="#8CFFFFFF"/>
</ColorAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Selected"/>
</VisualStateGroup>
<VisualStateGroup x:Name="FocusStates">
<VisualState x:Name="Unfocused"/>
<VisualState x:Name="Focused"/>
</VisualStateGroup>
<VisualStateGroup x:Name="ValidationStates">
<VisualState x:Name="Valid"/>
<VisualState x:Name="InvalidFocused"/>
<VisualState x:Name="InvalidUnfocused"/>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid Margin="0,0,1,0">
<Grid x:Name="Transform">
<Border x:Name="border1" Background="White"/>
</Grid>
<Border x:Name="border" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Background="{x:Null}" BorderBrush="{x:Null}">
<ContentControl x:Name="contentPresenter" Content="{TemplateBinding Header}" HorizontalAlignment="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" FocusVisualStyle="{DynamicResource g_EmptyFocusVisualStyle}"/>
</Border>
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" Value="{StaticResource TabItemHotBackground}"/>
</Trigger>
<Trigger Property="IsSelected" Value="true">
<Setter Property="Panel.ZIndex" Value="1"/>
<Setter Property="Background" Value="{StaticResource TabItemSelectedBackground}"/>
</Trigger>
<Trigger Property="Selector.IsSelected" Value="False">
<Setter Property="Foreground" Value="#8CFFFFFF"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Bottom">
<Setter Property="LayoutTransform" TargetName="Transform">
<Setter.Value>
<ScaleTransform ScaleY="-1" ScaleX="1"/>
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Left">
<Setter Property="LayoutTransform" TargetName="Transform">
<Setter.Value>
<RotateTransform Angle="-90"/>
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Right">
<Setter Property="LayoutTransform" TargetName="Transform">
<Setter.Value>
<RotateTransform Angle="90"/>
</Setter.Value>
</Setter>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
<Setter Property="Background" Value="{StaticResource TabItemDisabledBackground}"/>
<Setter Property="BorderBrush" Value="{StaticResource TabItemDisabledBorderBrush}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Top"/>
</MultiTrigger.Conditions>
<Setter Property="Margin" Value="-2,-2,-2,-1"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Bottom"/>
</MultiTrigger.Conditions>
<Setter Property="Margin" Value="-2"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Left"/>
</MultiTrigger.Conditions>
<Setter Property="Margin" Value="-2,-2,-1,-2"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Right"/>
</MultiTrigger.Conditions>
<Setter Property="Margin" Value="-1,-2,-2,-2"/>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
其他资源如下：
<SolidColorBrush x:Key="TabControlNormalBorderBrush" Color="#919B9C"/>
<LinearGradientBrush x:Key="TabItemNormalBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFFFFFFF" Offset="0"/>
<GradientStop Color="#FFBDBEDE" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="TabItemHotBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFFFFFFF" Offset="0"/>
<GradientStop Color="#FFBDBEDE" Offset="1"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="TabItemSelectedBackground" Color="#FFFCFCFE"/>
<SolidColorBrush x:Key="TabItemDisabledBackground" Color="#FFF5F4EA"/>
<SolidColorBrush x:Key="TabItemDisabledBorderBrush" Color="#FFC9C7BA"/>
<LinearGradientBrush x:Key="TabControlPaneTopNormalBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFFCFCFE" Offset="0"/>
<GradientStop Color="#FFF4F3EE" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="TabControlPaneBottomNormalBackground" EndPoint="0,0" StartPoint="0,1">
<GradientStop Color="#FFFCFCFE" Offset="0"/>
<GradientStop Color="#FFF4F3EE" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="TabControlPaneLeftNormalBackground" EndPoint="1,0" StartPoint="0,0">
<GradientStop Color="#FFFCFCFE" Offset="0"/>
<GradientStop Color="#FFF4F3EE" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="TabControlPaneRightNormalBackground" EndPoint="0,0" StartPoint="1,0">
<GradientStop Color="#FFFCFCFE" Offset="0"/>
<GradientStop Color="#FFF4F3EE" Offset="1"/>
</LinearGradientBrush>
我试过给文本提供/设置不同的颜色（白色除外），然后我注意到一切都按预期工作，直到TabControl被隐藏，但是一旦TabControl出现，所有文本都会恢复为白色隐藏然后重新显示。
是否有人知道可能导致此类行为的原因或上述XAML可能出现的问题？