标签:mil 代码 binding tom 鼠标 static begin html www.
原文:使用DataTrigger来代替Triggerr普通的Trigger监听鼠标移入的代码如下:
<Trigger Property="IsMouseOver" Value="true">
<Setter .../>
</Trigger>
而MultiTigger想实现,当属性等于某个值,同时鼠标移入时的需求:
理论上,代码应该如下:
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Mode=Self}, Path=IsChecked}" Value="False"/>
</MultiTrigger.Conditions>
<MultiTrigger.EnterActions>
<BeginStoryboard Storyboard="{StaticResource MouseEnter}"/>
</MultiTrigger.EnterActions>
<MultiTrigger.ExitActions>
<BeginStoryboard Storyboard="{StaticResource MouseLeave}"/>
</MultiTrigger.ExitActions>
</MultiTrigger>
但实际运行起来会报如下错误Must have non-null value for ‘Property‘.
所以我们需要转换一种方式,用MultiDataTrigger来实现上述的需求:
代码如下:
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True"/>
<Condition Binding="{Binding RelativeSource={RelativeSource Mode=Self}, Path=IsChecked}" Value="True"/>
</MultiDataTrigger.Conditions>
<Setter TargetName="LayoutRoot" Property="Background" Value="Red"/>
</MultiDataTrigger>
**将Trigger中的
<Condition Property="IsMouseOver" Value="True"/> 转换成DataTrigger中的
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True"/>
来实现我们的需求
标签:mil 代码 binding tom 鼠标 static begin html www.
原文地址:https://www.cnblogs.com/lonelyxmas/p/9278374.html