Question

I want to show the same content for all TabItems in a TabControl:

<TabControl>
    <TabItem Header="Tab 1">
        <StackPanel>
            <ComboBox />
            <Button Content="Button" x:Name="bButton" />
        </StackPanel>
    </TabItem>
    <TabItem Header="Tab 2" />
    <TabItem Header="Tab 3" />
</TabControl>

Is there an easy way to do this without repeating the code and only in XAML (not using code-behind)?

Answer 1

I moved the <StackPanel> outside the <TabControl> and set the margins to place it on top of the TabControl:

<TabControl HorizontalAlignment="Left">
    <TabItem Header="Tab 1" />
    <TabItem Header="Tab 2" />
    <TabItem Header="Tab 3" />
</TabControl>
<StackPanel HorizontalAlignment="Left" Margin="5,50,0,0">
    <ComboBox />
    <Button Content="Button" x:Name="bButton" />
</StackPanel>

This is the cleanest and simplest approach.