基础用法

<Window.Resources>
        <Style x:Key="btnStyle" TargetType="{x:Type Button}">
            <Setter Property="Height" Value="40"/>
            <Setter Property="Width" Value="100"/>
            <Setter Property="Background" Value="Beige"/>
            <Setter Property="RenderTransform">
                <Setter.Value>
                    <RotateTransform Angle="45"/>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <StackPanel>
        <Button Content="btn1" Style="{StaticResource ResourceKey=btnStyle}"/>
        <Button Content="btn2" Style="{StaticResource ResourceKey=btnStyle}"/>
    </StackPanel>

样式的继承机制BasedOn=”{StaticResource keyName}”

ResourceKey=可以省略，当有键名时，如果没有键名，则需要默认为TargetType值{StaticResource {x:Type Control}}

<Window.Resources>
        <Style x:Key="controlStyle" TargetType="{x:Type Control}">
            <Setter Property="Height" Value="40"/>
            <Setter Property="Width" Value="100"/>
            <Setter Property="Background" Value="Blue"/>
            <Setter Property="RenderTransform">
                <Setter.Value>
                    <RotateTransform Angle="45"/>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="btnStyle" BasedOn="{StaticResource ResourceKey=controlStyle}" 
               TargetType="{x:Type Button}">
            <Setter Property="Background" Value="Gray"/>
        </Style>
        <Style x:Key="radioBtn" BasedOn="{StaticResource controlStyle}" 
               TargetType="{x:Type RadioButton}">
            <Setter Property="FontSize" Value="50"/>
        </Style>
    </Window.Resources>
    <StackPanel>
        <Button Content="btn1" Style="{StaticResource ResourceKey=btnStyle}"/>
        <Button Content="btn2" Style="{StaticResource ResourceKey=btnStyle}"/>
        <RadioButton Content="radioBtn" Style="{StaticResource radioBtn}"/>
    </StackPanel>

触发器

三种触发器：
（1）属性触发器（Trigger）:如代码1所示
（2）数据触发器（DataTrigger）：普通.NET属性，而不仅仅依赖属性值改变时触发
（3）事件触发器（EventTrigger）:触发路由事件时会被调用，代码2所示

<Style x:Key="btnStyle" BasedOn="{StaticResource ResourceKey=controlStyle}" 
               TargetType="{x:Type Button}">
            <Setter Property="Background" Value="Gray"/>
            <Style.Triggers>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="Background" Value="BlanchedAlmond">
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>

<Button Content="btn1" Style="{StaticResource ResourceKey=btnStyle}">
            <Button.Triggers>
                <EventTrigger RoutedEvent="Button.Loaded">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0" 
                            To="1" Duration="0:0:5"/>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Button.Triggers>
        </Button>