如何通过Xaml Behaviors设置图像源属性？

Question

我想在每个FlipView项目上更改背景图片。我尝试了这段代码，但它会触发错误“Only IBehavior types are supported in a BehaviorCollection.”。

如何正确设置图像源？

<Grid>
    <i:Interaction.Behaviors>
        <core:DataTriggerBehavior
            Binding="{Binding SelectedIndex, ElementName=TourFlipView}"
            ComparisonCondition="Equal"
            Value="1" />
        <core:ChangePropertyAction
            TargetObject="{Binding ElementName=TourFlipViewBackgroundImage}"
            PropertyName="Source"
            Value="ms-appx:///Assets/Images/2.png" />
    </i:Interaction.Behaviors>

    <Image
        x:Name="TourFlipViewBackgroundImage"
        Source="ms-appx:///Assets/Images/1.png" />

    <FlipView
        x:Name="TourFlipView">
        ...
    <FlipView/>
</Grid>

- Make Makeluv

Answer 1

你做得几乎正确，只有一个小错误。把你的ChangePropertyAction放在DataTriggerBehavior里面。

<i:Interaction.Behaviors>
    <core:DataTriggerBehavior
        Binding="{Binding SelectedIndex, ElementName=TourFlipView}"
        ComparisonCondition="Equal"
        Value="1" >
        <core:ChangePropertyAction
            TargetObject="{Binding ElementName=TourFlipViewBackgroundImage}"
            PropertyName="Source"
            Value="ms-appx:///Assets/Images/2.png" />
    </core:DataTriggerBehavior> 
</i:Interaction.Behaviors>

- Andrii Krupka