c# - Storyboard 仅针对第二个条件触发一次

Question

我有一个按钮，在该按钮上运行 TextBlock MultiDataTrigger，但在每次单击按钮时它只运行两次。

解释:第一个默认 TextBlock 文本断开连接，然后有两个 MultiDataTriggers 满足条件运行，然后在另一个 MultiDataTrigger 再次点击按钮后，但在此之后没有 Storyboard 动画工作。

文本 block

<TextBlock x:Name="abctxt" Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="2" HorizontalAlignment="Center" Text="Disconnected">
    <TextBlock.Style>
        <Style TargetType="TextBlock">
            <Style.Triggers>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding ElementName=sbbtn, Path=IsPressed}" Value="True" />
                        <Condition Binding="{Binding ElementName=abctxt, Path=Text}" Value="Connected" />
                    </MultiDataTrigger.Conditions>
                    <MultiDataTrigger.EnterActions>
                        <BeginStoryboard Storyboard="{StaticResource DisconnectedTextChange}"/>
                    </MultiDataTrigger.EnterActions>
                </MultiDataTrigger>
                <MultiDataTrigger>
                    <MultiDataTrigger.Conditions>
                        <Condition Binding="{Binding ElementName=sbbtn, Path=IsPressed}" Value="True" />
                        <Condition Binding="{Binding ElementName=abctxt, Path=Text}" Value="Disconnected" />
                    </MultiDataTrigger.Conditions>
                    <MultiDataTrigger.EnterActions>
                        <BeginStoryboard Storyboard="{StaticResource ConnectedTextChange}"/>
                    </MultiDataTrigger.EnterActions>
                </MultiDataTrigger>
            </Style.Triggers>
        </Style>
    </TextBlock.Style>
</TextBlock>

按钮

<Button x:Name="sbbtn" />

Storyboard

<Storyboard x:Key="ConnectedTextChange" x:Name="ConnectedTextChange">
    <StringAnimationUsingKeyFrames Storyboard.TargetProperty="(TextBlock.Text)" AccelerationRatio="1">
        <DiscreteStringKeyFrame KeyTime="0:0:0.8" Value="Connected"/>
    </StringAnimationUsingKeyFrames>
</Storyboard>

<Storyboard x:Key="DisconnectedTextChange" x:Name="DisconnectedTextChange">
    <StringAnimationUsingKeyFrames Storyboard.TargetProperty="(TextBlock.Text)" AccelerationRatio="1">
        <DiscreteStringKeyFrame KeyTime="0:0:0.8" Value="Disconnected"/>
    </StringAnimationUsingKeyFrames>
</Storyboard>

Answer 1

使用单一条件 IsChecked 而不是检查文本框文本或按下的按钮，不要使用简单的 Button，而是使用 ToggleButton 并在其上应用您的 Button 样式。

你可以这样使用它:

您的TextBlock

<TextBlock x:Name="abctxt" Text="Disconnected" />

ToggleButton 而不是 Button

<ToggleButton x:Name="sbbtn"> <!-- Also Apply Your Style For making your ToggleButton looks like your Button -->
<ToggleButton.Triggers>
    <EventTrigger RoutedEvent="ToggleButton.Checked">
        <BeginStoryboard Storyboard="{StaticResource ConnectedTextChange}" />
    </EventTrigger>
    <EventTrigger RoutedEvent="ToggleButton.Unchecked">
        <BeginStoryboard Storyboard="{StaticResource DisconnectedTextChange}" />
    </EventTrigger>
    </ToggleButton.Triggers>

您的 Storyboard

<!-- Here i set TargetName also -->
<Storyboard x:Key="ConnectedTextChange" x:Name="ConnectedTextChange" Storyboard.TargetName="abctxt">
<StringAnimationUsingKeyFrames Storyboard.TargetProperty="(TextBlock.Text)" AccelerationRatio="1">
    <DiscreteStringKeyFrame KeyTime="0:0:0.8" Value="Connected"/>
</StringAnimationUsingKeyFrames>

<Storyboard x:Key="DisconnectedTextChange" x:Name="DisconnectedTextChange" Storyboard.TargetName="abctxt">
    <StringAnimationUsingKeyFrames Storyboard.TargetProperty="(TextBlock.Text)" AccelerationRatio="1">
        <DiscreteStringKeyFrame KeyTime="0:0:0.8" Value="Disconnected"/>
    </StringAnimationUsingKeyFrames>
</Storyboard>