Silverlight2 边学边练 之六 设定风格

本篇的内容较为简单，主要针对Style进行一个练习。Style简要的说就是一些属性值的集合，
作用和CSS比较像。在Silverlight2中定义Style只能同用于同种类型的Element。如下代码：

<Style x:Key="ButtonStyleTwo" targettype="Button">              <Setter Property="FontFamily" Value="Arial" />              <Setter Property="FontSize" Value="40" />              <Setter Property="Foreground" Value="Blue" />              <Setter Property="Background"></Style>

这就是一个定义好的Style，它只能用于Button组件，看看它如何产生作用，将Style直接嵌入Button：

<Button Content="Button">      <Button.Style>           <Style targettype="Button">                <Setter Property="FontFamily" Value="Arial" />                <Setter Property="FontSize" Value="40" />                <Setter Property="Foreground" Value="Blue" />                <Setter Property="Background">                   <Setter.Value>                     <LinearGradientBrush>                       <GradientStop Color="Green" Offset="0"></GradientStop>                       <GradientStop Color="Red" Offset="1"></GradientStop>                     </LinearGradientBrush>                   </Setter.Value>                </Setter>           </Style>      </Button.Style></Button>

 

当然也可以通过Resource的方式来设置Style，分别设置了两个Style：ButtonStyleOne、ButtonStyleTwo，
ButtonStyleOne设置为默认Style，ButtonStyleTwo用于在点击Button后切换Style。

XAML Code：

<UserControl x:Class="SilverlightTest.Page"      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"      Width="400">      <UserControl.Resources>          <Style x:Key="ButtonStyleOne" targettype="Button">              <Setter Property="FontFamily" Value="Georgia" />              <Setter Property="FontSize" Value="40" />              <Setter Property="Foreground" Value="SlateGray" />              <Setter Property="Background">                  <Setter.Value>                      <LinearGradientBrush>                          <GradientStop Color="Blue" Offset="0"></GradientStop>                          <GradientStop Color="Yellow" Offset="1"></GradientStop>                      </LinearGradientBrush>                  </Setter.Value>              </Setter>          </Style>          <Style x:Key="ButtonStyleTwo" targettype="Button">              <Setter Property="FontFamily" Value="Arial" />              <Setter Property="FontSize" Value="40" />              <Setter Property="Foreground" Value="Pink" />              <Setter Property="Background">                  <Setter.Value>                      <LinearGradientBrush>                          <GradientStop Color="Green" Offset="0"></GradientStop>                          <GradientStop Color="Red" Offset="1"></GradientStop>                      </LinearGradientBrush>                  </Setter.Value>              </Setter>          </Style>      </UserControl.Resources>      <StackPanel x:Name="LayoutRoot" Background="White">          <Button x:Name="TestButton" Content="A Customized Button" 
Style="{StaticResource ButtonStyleOne}" Click="Button_Click"></Button>      </StackPanel>  </UserControl>

用C#来切换Sytle，如下代码：

private void Button_Click(object sender,RoutedEventArgs e)  {     //切换Style:ButtonStyleTwo     TestButton.Style = this.Resources["ButtonStyleTwo"] as Style;     //修改Button文字
TestButton.Content = "Style Changed";  }

实例Demo效果（感谢GWPBrian指导SL嵌入cnblogs方法）：

本例参考自《Pro Silverlight 2 in C# 2008》CHAPTER 11 ■ STYLES,TEMPLATES,AND CUSTOM CONTROLS