WPF GroupBox标题对齐问题

如何将groupBox标题与中心对齐，而不是与默认的左侧位置对齐

我在许多帖子中读到，一个人可以使用模板，但我不知道这样的事情。所以，请让我知道如何才能在中心得到头球

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谢谢

是的，您必须修改模板

有关中心对齐的信息请参见Thomas Levesque的
有关右对齐的信息，请参见Mihir Gokani

上传了一个包含中心对齐和右对齐的示例项目，如下所示：

使用与Thomas相同的方法进行中心对齐

像这样可用

<GroupBox Header="Centered Header"
          Style="{StaticResource CenteredHeaderGroupBoxStyle}"
          .../>

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你的解决方案对我来说完美无瑕……非常感谢，但我注意到一些差异，这些差异并不困扰我，但我认为我应该与你分享。在普通GropuBox中，当我们插入网格时，网格位于带有一些默认边距的groupbox中。而在本例中（ur groupBox），网格的起始位置与标题完全相同。您可以尝试在示例的每个groupbox中插入一个网格，这样您就会明白我在说什么。我认为这和填充或边距有关。将在您的代码中查看。。。。再次非常感谢@你说得对，这真的很奇怪。它仅在Visual Studio 2010 Designer中发生，而不在Expression Blend 4中发生，并且在使用Blend创建的默认模板时发生。我会调查的。观察得好@Pankaj Upadhyay：我在模板中没有看到任何错误，所以可能是VS2010 Designer中的错误，或者可能是我缺少了一些东西。我不使用表达式混合，所以不能说太多：-P，但认为它值得废弃。。。只需按原样使用您的解决方案。。。。。Thanks@Pankaj乌帕迪亚：是的，确实是：）如果我发现更多关于这个主题的信息，我会在这里更新

<local:CenterBorderGapMaskConverter x:Key="CenterBorderGapMaskConverter"/>
<Style x:Key="CenteredHeaderGroupBoxStyle" TargetType="{x:Type GroupBox}">
    <Setter Property="BorderBrush" Value="#D5DFE5"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type GroupBox}">
                <Grid SnapsToDevicePixels="true">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="6"/>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="6"/>
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="6"/>
                    </Grid.RowDefinitions>
                    <Border BorderBrush="Transparent" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.ColumnSpan="4" Grid.Column="0" CornerRadius="4" Grid.Row="1" Grid.RowSpan="3"/>
                    <Border Grid.ZIndex="2" x:Name="Header" Grid.Column="2" HorizontalAlignment="Center" Padding="3,1,3,0" Grid.Row="0" Grid.RowSpan="2">
                        <ContentPresenter ContentSource="Header" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    </Border>
                    <ContentPresenter Grid.ColumnSpan="2" Grid.Column="1" Margin="{TemplateBinding Padding}" Grid.Row="2" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    <Border RenderTransformOrigin="0.5,0.5" BorderBrush="White" BorderThickness="{TemplateBinding BorderThickness}" Grid.ColumnSpan="4" CornerRadius="4" Grid.Row="1" Grid.RowSpan="3">
                        <Border.OpacityMask>
                            <MultiBinding ConverterParameter="7" Converter="{StaticResource CenterBorderGapMaskConverter}">
                                <Binding ElementName="Header" Path="ActualWidth"/>
                                <Binding Path="ActualWidth" RelativeSource="{RelativeSource Self}"/>
                                <Binding Path="ActualHeight" RelativeSource="{RelativeSource Self}"/>
                            </MultiBinding>
                        </Border.OpacityMask>
                        <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="3">
                            <Border BorderBrush="White" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="2"/>
                        </Border>
                    </Border>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

class CenterBorderGapMaskConverter : IMultiValueConverter
{
    // Methods
    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
        Type type = typeof(double);
        if (values == null
            || values.Length != 3
            || values[0] == null
            || values[1] == null
            || values[2] == null
            || !type.IsAssignableFrom(values[0].GetType())
            || !type.IsAssignableFrom(values[1].GetType())
            || !type.IsAssignableFrom(values[2].GetType()))
        {
            return DependencyProperty.UnsetValue;
        }

        double pixels = (double)values[0];
        double width = (double)values[1];
        double height = (double)values[2];
        if ((width == 0.0) || (height == 0.0))
        {
            return null;
        }
        Grid visual = new Grid();
        visual.Width = width;
        visual.Height = height;
        ColumnDefinition colDefinition1 = new ColumnDefinition();
        ColumnDefinition colDefinition2 = new ColumnDefinition();
        ColumnDefinition colDefinition3 = new ColumnDefinition();
        colDefinition1.Width = new GridLength(1.0, GridUnitType.Star);
        colDefinition2.Width = new GridLength(pixels);
        colDefinition3.Width = new GridLength(1.0, GridUnitType.Star);
        visual.ColumnDefinitions.Add(colDefinition1);
        visual.ColumnDefinitions.Add(colDefinition2);
        visual.ColumnDefinitions.Add(colDefinition3);
        RowDefinition rowDefinition1 = new RowDefinition();
        RowDefinition rowDefinition2 = new RowDefinition();
        rowDefinition1.Height = new GridLength(height / 2.0);
        rowDefinition2.Height = new GridLength(1.0, GridUnitType.Star);
        visual.RowDefinitions.Add(rowDefinition1);
        visual.RowDefinitions.Add(rowDefinition2);
        Rectangle rectangle1 = new Rectangle();
        Rectangle rectangle2 = new Rectangle();
        Rectangle rectangle3 = new Rectangle();
        rectangle1.Fill = Brushes.Black;
        rectangle2.Fill = Brushes.Black;
        rectangle3.Fill = Brushes.Black;
        Grid.SetRowSpan(rectangle1, 2);
        Grid.SetRow(rectangle1, 0);
        Grid.SetColumn(rectangle1, 0);
        Grid.SetRow(rectangle2, 1);
        Grid.SetColumn(rectangle2, 1);
        Grid.SetRowSpan(rectangle3, 2);
        Grid.SetRow(rectangle3, 0);
        Grid.SetColumn(rectangle3, 2);
        visual.Children.Add(rectangle1);
        visual.Children.Add(rectangle2);
        visual.Children.Add(rectangle3);
        return new VisualBrush(visual);
    }
    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
    {
        return new object[] { Binding.DoNothing };
    }
}