樣式：封裝一系列屬性的集合，如外邊距、內(nèi)邊距、顏色、字體等。

①一般在設(shè)置樣式時(shí)都要指明TargeType屬性，否則用Setter設(shè)置屬性時(shí)會(huì)非常麻煩，比如必須寫B(tài)utton.FontSize或TextBlock.FontFamily等。

②若定義樣式的時(shí)候不使用x:Key鍵名，則TargeType屬性就會(huì)作為自動(dòng)應(yīng)用樣式的快捷鍵。

③樣式的鍵名有兩種寫法，它倆是等效的：x:Key="{x:Type Button}"和x:Key="Button"

④通過設(shè)置元素的Style="{x:Null}"，可以刪除自動(dòng)應(yīng)用的樣式。

下面列舉三個(gè)個(gè)樣式的實(shí)例代碼：

屬性觸發(fā)器例子：

<Window x:Class="Styles.SimpleTriggers"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/PResentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    Title="SimpleTriggers" Height="300" Width="300"    >  <Window.Resources>    <Style x:Key="BigFontButton">      <Style.Setters>        <Setter Property="Control.FontFamily" Value="Times New Roman" />                <Setter Property="Control.FontSize" Value="18" />            </Style.Setters>      <Style.Triggers>        <Trigger Property="Control.IsFocused" Value="True">          <Setter Property="Control.Foreground" Value="DarkRed" />        </Trigger>        <Trigger Property="Control.IsMouSEOver" Value="True">          <Setter Property="Control.Foreground" Value="LightYellow" />          <Setter Property="Control.FontWeight" Value="Bold" />        </Trigger>                <Trigger Property="Button.IsPressed" Value="True">          <Setter Property="Control.Foreground" Value="Red" />        </Trigger>      </Style.Triggers>    </Style>  </Window.Resources>  <StackPanel Margin="5">    <Button Padding="5" Margin="5" Style="{StaticResource BigFontButton}" >A Customized Button</Button>    <TextBlock Margin="5">Normal Content.</TextBlock>    <Button Padding="5" Margin="5">A Normal Button</Button>    <TextBlock Margin="5">More normal Content.</TextBlock>    <Button Padding="5" Margin="5" Style="{StaticResource BigFontButton}">Another Customized Button</Button>  </StackPanel></Window>
事件觸發(fā)器例子：
<Window x:Class="Styles.EventTriggers"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    Title="EventTriggers" Height="300" Width="300"    >  <Window.Resources>    <Style x:Key="BigFontButton">      <Style.Setters>        <Setter Property="Control.FontFamily" Value="Times New Roman" />        <Setter Property="Control.FontSize" Value="18" />        <Setter Property="Control.FontWeight" Value="Bold" />      </Style.Setters>            <Style.Triggers>        <EventTrigger RoutedEvent="Mouse.MouseEnter">          <EventTrigger.Actions>            <BeginStoryboard>              <Storyboard>                <DoubleAnimation                  Duration="0:0:0.2"                  Storyboard.TargetProperty="FontSize"                  To="22"  />              </Storyboard>            </BeginStoryboard>          </EventTrigger.Actions>        </EventTrigger>        <EventTrigger RoutedEvent="Mouse.MouseLeave">          <EventTrigger.Actions>            <BeginStoryboard>              <Storyboard>                <DoubleAnimation                  Duration="0:0:1"                  Storyboard.TargetProperty="FontSize"  />              </Storyboard>            </BeginStoryboard>          </EventTrigger.Actions>        </EventTrigger>      </Style.Triggers>    </Style>      </Window.Resources>  <StackPanel Margin="5">    <Button Padding="5" Margin="5" Style="{StaticResource BigFontButton}">A Customized Button</Button>    <TextBlock Margin="5">Normal Content.</TextBlock>    <Button Padding="5" Margin="5">A Normal Button</Button>    <TextBlock Margin="5">More normal Content.</TextBlock>    <Button Padding="5" Margin="5" Style="{StaticResource BigFontButton}">Another Customized Button</Button>  </StackPanel></Window>自動(dòng)應(yīng)用樣式例子：
<Window x:Class="Styles.AutomaticStyles"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    Title="AutomaticStyles" Height="300" Width="300"    >  <Window.Resources>    <Style TargetType="Button">      <Setter Property="FontFamily" Value="Times New Roman" />      <Setter Property="FontSize" Value="18" />      <Setter Property="FontWeight" Value="Bold" />    </Style>  </Window.Resources>  <StackPanel Margin="5">    <Button Padding="5" Margin="5">Customized Button</Button>    <TextBlock Margin="5">Normal Content.</TextBlock>    <Button Padding="5" Margin="5" Style="{x:Null}"            >A Normal Button</Button>    <TextBlock Margin="5">More normal Content.</TextBlock>    <Button Padding="5" Margin="5">Another Customized Button</Button>  </StackPanel></Window>