Content 属性内可以放一个任何控件
代码
<Button Width="400" Height="400" Margin="20" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch" >
<Button.Content>
<Grid >
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Ellipse Width="96" Height="96" Fill="Red" StrokeThickness="2" Stroke="Green" />
<Image Grid.Row="1" Source="ff.jpg" Stretch="Uniform" />
<TextBlock Grid.Row="2" Text="Click Me" FontSize="24" TextAlignment="Center" />
</Grid>
</Button.Content>
</Button>