1.BaseOn是用于样式的继承;
2.Style="{x:Null}"是指不采用任何样式;
3.Trigger:包括单条件的触发Trigger,多条件的触发MultiTrigger,事件触发EventTrigger;
<Window.Resources>
<Style x:Key="BigFontButtonStyle">
<Setter Property="TextBlock.FontSize" Value="18"/>
<Setter Property="Control.FontWeight" Value="Bold"/>
<Setter Property="Button.Content" Value="你好"/>
<Style.Triggers>
<EventTrigger RoutedEvent="Mouse.MouseEnter">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Duration="0:0:0:2" To="48" Storyboard.TargetProperty="FontSize"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="Mouse.MouseLeave">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Duration="0:0:0:2" To="18" Storyboard.TargetProperty="FontSize"/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Style.Triggers>
</Style>
<Style TargetType="Button" BasedOn="{StaticResource BigFontButtonStyle}">
<Setter Property="Control.Background" Value="AliceBlue"/>
<Style.Triggers>
<Trigger Property="Button.IsPressed" Value="true">
<Setter Property="Button.Foreground" Value="Azure"/>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="textboxStyle">
<Setter Property="Control.Width" Value="100"/>
<Setter Property="Control.Height" Value="50"/>
<Style.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="TextBox.IsFocused" Value="true"/>
<Condition Property="TextBox.IsMouseOver" Value="true"/>
</MultiTrigger.Conditions>
<MultiTrigger.Setters>
<Setter Property="TextBox.Text" Value="请输入"/>
</MultiTrigger.Setters>
</MultiTrigger>
</Style.Triggers>
</Style>
</Window.Resources>
<Grid>
<UniformGrid >
<Button Width="50" Height="50" Style="{x:Null}" />
<Button Width="50" Height="50"/>
<Button Width="50" Height="50"/>
<Button Width="50" Height="50"/>
<TextBox Style="{StaticResource textboxStyle}" />
</UniformGrid>
</Grid>