【silverlight】应用Style

cmd.Style = (Style)this.Resources[ "AlternateBigButtonStyle"];

后台设置style，来源于其他资源文件
ResourceDictionary resourceDictionary = new ResourceDictionary();
resourceDictionary.Source = new Uri("/Styles/AlternateStyles.xaml",
 UriKind.Relative);
Style newStyle = (Style)resourceDictionary[ "BigButtonStyle"];
cmd.Style = newStyle;

UserControl.Resources>
 <Style x: Key="BigButtonStyle" TargetType="Button">
 <Setter Property="FontFamily" Value="Georgia" />
 <Setter Property="FontSize" Value="40" />
 <Setter Property="Padding" Value="20" />
 <Setter Property="Margin" Value="10" />
 </Style>
 <Style x: Key="EmphasizedBigButtonStyle" TargetType="Button"
 BasedOn="{StaticResource BigButtonStyle}">
 <Setter Property="BorderBrush" Value="Black" />
 <Setter Property="BorderThickness" Value="5" />
 </Style>
</UserControl.Resources>

<UserControl.Resources>
 <FontFamily x: Key="buttonFontFamily">Georgia</FontFamily>
 <sys: Double x: Key="buttonFontSize">18</sys: Double>
 <FontWeight x: Key="buttonFontWeight">Bold</FontWeight>
 <Style x: Key="BigButtonStyle1" TargetType="Button">
 <Setter Property="FontFamily" Value="{StaticResource buttonFontFamily}" />
 <Setter Property="FontSize" Value="{StaticResource buttonFontSize}" />
 <Setter Property="FontWeight" Value="{StaticResource buttonFontWeight}" />
 </Style>

public class FontInfo
{
 public FontFamily FontFamily { get; set; }
 public double FontSize { get; set; }
 public FontWeight FontWeight { get; set; }
}

And if you make that namespace available to your markup:

<UserControl xmlns: local="clr-namespace:Styles" ... >

you can use it in your resources collection and bind to it in your styles:

<UserControl.Resources>
 <local: FontInfo x: Key="buttonFont" FontFamily="Georgia" FontSize="18"
 FontWeight="Bold"></local: FontInfo>
 <Style x: Key="BigButtonStyle2" TargetType="Button">
 <Setter Property="Padding" Value="20" />
 <Setter Property="Margin" Value="10" />
 <Setter Property="FontFamily"
 Value="{Binding Source={StaticResource buttonFont}, Path=FontFamily}" />
 <Setter Property="FontSize"
 Value="{Binding Source={StaticResource buttonFont}, Path=FontSize}" />
 <Setter Property="FontWeight"
 Value="{Binding Source={StaticResource buttonFont}, Path=FontWeight}" />
 </Style>
</UserControl.Resources>