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;
}