一个简单的数据绑定,用slider和TextBox控制字体大小

前台代码XAML
<Window x:Class="WpfApplication4.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" WindowState="Normal" WindowStartupLocation="CenterScreen">
    <StackPanel Margin="5">
        <Slider Name="sliderFontSize" Margin="3" Minimum="1" Maximum="40" Value="10" TickFrequency="1"
                IsSnapToTickEnabled="True" TickPlacement="TopLeft">
        </Slider>
        <TextBlock Margin="10" Name="lbSimpleText" Text="Simple text"
                   FontSize="{Binding ElementName=sliderFontSize,Path=Value,Mode=TwoWay}"></TextBlock>
        <StackPanel Orientation="Horizontal">
            <Button Margin="5" Padding="3" Click="cmd_SetSmall">Set to small</Button>
            <Button Margin="5" Padding="3" Click="cmd_SetNormal">Set to Noarmal</Button>
            <Button Margin="5" Padding="3" Click="cmd_SetBig">Set to Big</Button>
        </StackPanel>
        <StackPanel  Orientation="Horizontal" Margin="5" >
            <TextBlock VerticalAlignment="Center" xml:space="preserve">Exact size: </TextBlock>
            <TextBox Text="{Binding ElementName=lbSimpleText,Path=FontSize,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}" Width="100"></TextBox>
        </StackPanel>
            </StackPanel>
</Window>

后台代码 C#
private void cmd_SetSmall(object sender, RoutedEventArgs e)
{
    sliderFontSize.Value = 2;
}
private void cmd_SetNormal(object sender, RoutedEventArgs e)
{
    sliderFontSize.Value = this.FontSize;
}
private void cmd_SetBig(object sender, RoutedEventArgs e)
{
    sliderFontSize.Value = 30;
}