wpf触发器DataTrigger绑定切换

最新推荐文章于 2025-06-16 17:08:29 发布

原创最新推荐文章于 2025-06-16 17:08:29 发布 · 1.7k 阅读

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本文详细探讨了WPF中DataTrigger的工作原理和使用技巧，重点介绍了如何利用DataTrigger进行数据绑定的切换，以实现视图与模型之间的动态交互。通过实例解析，展示了DataTrigger在控制UI元素显示状态、响应数据变化等方面的关键作用。

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        <Style x:Key="playBtn" TargetType="{x:Type control:ButtonWithIcon}">
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="Width" Value="28"/>
            <Setter Property="Height" Value="28"/>
            <Setter Property="IconWidth" Value="28"/>
            <Setter Property="IconHeight" Value="28"/>
            <Setter Property="IconPath" Value="/QuJiao;component/Resource/Image/Prepare/LevelReading/bh_pla_icon_play.png"/>
            <Setter Property="SecondIconPath" Value="/QuJiao;component/Resource/Image/Prepare/LevelReading/bh_pla_icon_pause.png"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type control:ButtonWithIcon}">
                        <Grid Width="{TemplateBinding Width}" Height="{TemplateBinding Height}">
                            <Image x:Name="img" 
                                   Stretch="Uniform" 
                                   HorizontalAlignment="Center" VerticalAlignment="Center"
                                   Width="{TemplateBinding IconWidth}" 
                                   Height="{TemplateBinding IconHeight}" 
                                   Source="{TemplateBinding IconPath}"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <DataTrigger Binding="{你VM里的触发变量}" Value="True">
                                <Setter Property="Source" TargetName="img" Value="{Binding Path=SecondIconPath, RelativeSource={RelativeSource AncestorType={x:Type control:ButtonWithIcon}}}"/>
                            </DataTrigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>