WPF 中带有 Setter 的 EventTrigger?

发布于 2024-09-26 10:45:05 字数 349 浏览 7 评论 0原文

我在 WPF 窗口中有一个普通的按钮和文本框,我想要一个带有 EventTrigger 的按钮模板,该事件触发器侦听 Button.Click,然后设置文本框的布尔属性。没有隐藏代码。

像这样的事情:

<ControlTemplate.Triggers>
  <EventTrigger SourceName="MyButton" RoutedEvent="Button.Click">
    <Setter TargetName="MyTextBox" Property="Focusable" Value="False" />
  </EventTrigger>

I have a normal Button and TextBox in a WPF-Window and I want a Template for the Button with a EventTrigger that listens to Button.Click and then sets a boolean-property of the TextBox. No code-behind.

Something like this:

<ControlTemplate.Triggers>
  <EventTrigger SourceName="MyButton" RoutedEvent="Button.Click">
    <Setter TargetName="MyTextBox" Property="Focusable" Value="False" />
  </EventTrigger>

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子栖 2024-10-03 10:45:05

以下是从 EventTrigger 设置和清除 TextBox 上的 Focusable 的示例。
希望您可以根据您的情况调整此示例。

<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>

Here is a sample that sets and clears Focusable on a TextBox from an EventTrigger.
Hopefully you can adapt this example to your situation.

<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>
英雄似剑 2024-10-03 10:45:05

您可以利用行为来实现您想要的结果:
首先,添加引用:

xmlns:b="http://schemas.microsoft.com/xaml/behaviors"

然后,您可以使用交互触发器和 ChangePropertyAction

<Button>
    <b:Interaction.Triggers>
        <b:EventTrigger EventName="Click">
            <b:ChangePropertyAction PropertyName="Focusable" Value="False"/>
        </b:EventTrigger>
    </b:Interaction.Triggers>
</Button>

您还可以通过指定 TargetObject 来使用它来更改 DataContext 中的属性,如下所示:

<b:ChangePropertyAction TargetObject="{Binding MemberOfYourDataContext}" PropertyName="PropertyOfYourDataContextMember" Value="StaticValueOrBinding"/>

You can make use of behaviours to achieve your desired outcome:
First, add the reference:

xmlns:b="http://schemas.microsoft.com/xaml/behaviors"

Afterwards, you can assign a Value to any Property of your choosing using an Interaction Trigger and a ChangePropertyAction:

<Button>
    <b:Interaction.Triggers>
        <b:EventTrigger EventName="Click">
            <b:ChangePropertyAction PropertyName="Focusable" Value="False"/>
        </b:EventTrigger>
    </b:Interaction.Triggers>
</Button>

You can also use this to change properties in your DataContext by specifying a TargetObject like so:

<b:ChangePropertyAction TargetObject="{Binding MemberOfYourDataContext}" PropertyName="PropertyOfYourDataContextMember" Value="StaticValueOrBinding"/>
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