WPF中的触发器
1. 简单触发器
<Window x:Class="项目10.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:local="clr-namespace:项目10"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="500">
<Window.Resources>
<Style x:Key="BigFontButton">
<Setter Property="Control.FontFamily" Value="Times New Roma"/>
<Setter Property="Control.FontSize" Value="32"/>
<Style.Triggers>
<Trigger Property="Control.IsFocused" Value="True">
<Setter Property="Control.Foreground" Value="YellowGreen"></Setter>
</Trigger>
<Trigger Property="Button.IsPressed" Value="True">
<Setter Property="Control.Foreground" Value="BlueViolet"></Setter>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
<StackPanel Margin="5" x:Name="StackPanel1">
<Button Style="{StaticResource BigFontButton}">Button</Button>
<TextBox>safasf</TextBox>
</StackPanel>
</Window>

2. 事件触发器
<Window x:Class="项目10.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:local="clr-namespace:项目10"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="500">
<Window.Resources>
<Style x:Key="BigFontButton">
<Setter Property="Control.FontFamily" Value="Times New Roma"/>
<Setter Property="Control.FontSize" Value="18"/>
<Style.Triggers>
<EventTrigger RoutedEvent="Mouse.MouseEnter">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Duration="0:0:0.8" Storyboard.TargetProperty="FontSize" To="48"></DoubleAnimation>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="Mouse.MouseLeave">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Duration="0:0:0.8" Storyboard.TargetProperty="FontSize" To="15"></DoubleAnimation>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Style.Triggers>
</Style>
</Window.Resources>
<StackPanel Margin="5" x:Name="StackPanel1">
<Button Style="{StaticResource BigFontButton}">Button</Button>
<TextBox>safasf</TextBox>
</StackPanel>
</Window>
