WPF:如何将内容控件包装在另一个控件中?

你可以用一种简单的方式来完成这个(如果我能正确地理解你的话)。

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <Window.Resources>
        <Style TargetType="{x:Type Label}" x:Key="NiceLabelStyle">
            <Setter Property="FontWeight" Value="Bold" />
            <Setter Property="BorderThickness" Value="1" />
            <Setter Property="HorizontalAlignment" Value="Stretch" />
            <Setter Property="Background">
                <Setter.Value>
                    <LinearGradientBrush EndPoint="0.5,1"
                             StartPoint="0.5,0">
                        <GradientStop Color="#FFB6B5C3"
                          Offset="0" />
                        <GradientStop Color="#FFF4F4F6"
                          Offset="1" />
                    </LinearGradientBrush>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <StackPanel>
        <Label Style="{StaticResource NiceLabelStyle}">Test</Label>
    </StackPanel>
</Window>

可能包括在 How to create a WPF UserControl with NAMED content