如何通过 Xaml 行为设置图像源 属性？

Question

我想更改每个 FlipView 项目的背景图像。 我正在尝试这段代码，但它引发了错误 Only IBehavior types are supported in a BehaviorCollection.

如何正确设置图片来源？

<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>

Answer 1

你几乎是纠正了一个小错误。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>