WPF通过EventTrigger改变其他控件的值

场景:点击TextBox后弹出Poppup

原理:使用EventTrigger后触发StoryBoard,通过StoryBoard改变其他控件的值。

参考代码:

<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBox
x:Name="tb"
Grid.Row="0"
Text="Here is some sample text">
</TextBox>
<Button
x:Name="btnFocusTrue"
Grid.Row="1"
Content="Set True">
</Button>
<Button
x:Name="btnFocusFalse"
Grid.Row="2"
Content="Set False">
</Button>
<Grid.Triggers>
<EventTrigger RoutedEvent="Button.Click" SourceName="btnFocusTrue">
<BeginStoryboard Name="FocusTrueStoryboard">
<Storyboard >
<BooleanAnimationUsingKeyFrames
Storyboard.TargetName="tb"
Storyboard.TargetProperty="(TextBox.Focusable)">
<DiscreteBooleanKeyFrame
KeyTime="00:00:01"
Value="True" />
</BooleanAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="Button.Click" SourceName="btnFocusFalse">
<BeginStoryboard Name="FoucsFalseStoryboard">
<Storyboard >
<BooleanAnimationUsingKeyFrames
Storyboard.TargetName="tb"
Storyboard.TargetProperty="(TextBox.Focusable)">
<DiscreteBooleanKeyFrame
KeyTime="00:00:01"
Value="False" />
</BooleanAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Grid.Triggers>
</Grid>
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