我想为我的tabitems设置更粗的边框，而不更改默认行为。
我做了一些研究，似乎我需要使用ControlTemplate，但这会覆盖默认行为（即背景颜色消失，无论选择与否，背景颜色都保持不变。标签标题是当我将鼠标光标悬停在标题页等上时，不会以蓝色突出显示。）
如何在不弄乱当前行为的情况下调整边框？
谢谢！
答案 0 :(得分：1)
首先要说的是tabItem不负责tabcontrol内容的外观。
您有2个选项。 首先是下载Blend。为TabItem和TabControl制作默认样式的副本，并在那里进行更改。这比听起来容易得多
第二个是做以下事情：
private void Window_Loaded(object sender, RoutedEventArgs e)
{
var tabControlContentPanel = tb.Template.FindName("ContentPanel", tb) as Border;
tabControlContentPanel.BorderThickness = new Thickness(10);
foreach (TabItem tabItem in tb.Items)
{
var tabItemHeader = tabItem.Template.FindName("Bd", tabItem) as Border;
tabItemHeader.BorderThickness = new Thickness(10);
}
}
确保已加载TabControl和TabItems，否则“FindName”将返回null
<强>更新
我将与你分享TabControl和TabItem的默认样式，但我强烈建议你看看Blend。像这样使用它们：
<TabControl HorizontalAlignment="Left" MouseDown="tb_MouseDown" Name="tb" Height="300" VerticalAlignment="Top" Style="{DynamicResource TabControlStyle1}">
<TabItem Header="TabItem" Style="{DynamicResource TabItemStyle1}" >
<Grid Background="#FFE5E5E5"/>
</TabItem>
</TabControl>
样式：
<Window.Resources>
<SolidColorBrush x:Key="TabControlNormalBorderBrush" Color="#8C8E94"/>
<Style x:Key="TabControlStyle1" 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="#F9F9F9"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<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="2,2,2,0" Grid.Row="0" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1"/>
<Border x:Name="ContentPanel" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="0" KeyboardNavigation.DirectionalNavigation="Contained" Grid.Row="1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local">
<ContentPresenter x:Name="PART_SelectedContentHost" ContentSource="SelectedContent" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</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="2,0,2,2"/>
</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="2,2,0,2"/>
</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="0,2,2,2"/>
</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="TabItemFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="3,3,3,1" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<LinearGradientBrush x:Key="ButtonNormalBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#F3F3F3" Offset="0"/>
<GradientStop Color="#EBEBEB" Offset="0.5"/>
<GradientStop Color="#DDDDDD" Offset="0.5"/>
<GradientStop Color="#CDCDCD" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="TabItemHotBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#EAF6FD" Offset="0.15"/>
<GradientStop Color="#D9F0FC" Offset=".5"/>
<GradientStop Color="#BEE6FD" Offset=".5"/>
<GradientStop Color="#A7D9F5" Offset="1"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="TabItemSelectedBackground" Color="#F9F9F9"/>
<SolidColorBrush x:Key="TabItemHotBorderBrush" Color="#3C7FB1"/>
<SolidColorBrush x:Key="TabItemDisabledBackground" Color="#F4F4F4"/>
<SolidColorBrush x:Key="TabItemDisabledBorderBrush" Color="#FFC9C7BA"/>
<Style x:Key="TabItemStyle1" TargetType="{x:Type TabItem}">
<Setter Property="FocusVisualStyle" Value="{StaticResource TabItemFocusVisual}"/>
<Setter Property="Foreground" Value="Black"/>
<Setter Property="Padding" Value="6,1,6,1"/>
<Setter Property="BorderBrush" Value="{StaticResource TabControlNormalBorderBrush}"/>
<Setter Property="Background" Value="{StaticResource ButtonNormalBackground}"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="VerticalContentAlignment" Value="Stretch"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid SnapsToDevicePixels="true">
<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1,1,1,0" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}">
<ContentPresenter x:Name="Content" ContentSource="Header" HorizontalAlignment="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
</Border>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="Bd" Value="{StaticResource TabItemHotBackground}"/>
</Trigger>
<Trigger Property="IsSelected" Value="true">
<Setter Property="Panel.ZIndex" Value="1"/>
<Setter Property="Background" TargetName="Bd" Value="{StaticResource TabItemSelectedBackground}"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="false"/>
<Condition Property="IsMouseOver" Value="true"/>
</MultiTrigger.Conditions>
<Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource TabItemHotBorderBrush}"/>
</MultiTrigger>
<Trigger Property="TabStripPlacement" Value="Bottom">
<Setter Property="BorderThickness" TargetName="Bd" Value="1,0,1,1"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Left">
<Setter Property="BorderThickness" TargetName="Bd" Value="1,1,0,1"/>
</Trigger>
<Trigger Property="TabStripPlacement" Value="Right">
<Setter Property="BorderThickness" TargetName="Bd" Value="0,1,1,1"/>
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Top"/>
</MultiTrigger.Conditions>
<Setter Property="Margin" Value="-2,-2,-2,-1"/>
<Setter Property="Margin" TargetName="Content" Value="0,0,0,1"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Bottom"/>
</MultiTrigger.Conditions>
<Setter Property="Margin" Value="-2,-1,-2,-2"/>
<Setter Property="Margin" TargetName="Content" Value="0,1,0,0"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Left"/>
</MultiTrigger.Conditions>
<Setter Property="Margin" Value="-2,-2,-1,-2"/>
<Setter Property="Margin" TargetName="Content" Value="0,0,1,0"/>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Property="TabStripPlacement" Value="Right"/>
</MultiTrigger.Conditions>
<Setter Property="Margin" Value="-1,-2,-2,-2"/>
<Setter Property="Margin" TargetName="Content" Value="1,0,0,0"/>
</MultiTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="Bd" Value="{StaticResource TabItemDisabledBackground}"/>
<Setter Property="BorderBrush" TargetName="Bd" Value="{StaticResource TabItemDisabledBorderBrush}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>