Question

视像室11在Windows8使用。在Grid Application(Metro)中确定数据触发点,表明XAML中的这一错误:

随附财产触发器没有发现

<Image Stretch="UniformToFill">
     <Image.Style>
         <Style TargetType="Image">
             <Setter Property="Source" Value="{Binding Image}"/>
             <Style.Triggers>
                 <DataTrigger Binding="{Binding Image}" Value="{x:Null}">
                     <Setter Property="Source" Value="Images/Default.png"/>
                 </DataTrigger>
             </Style.Triggers>
         </Style>
    </Image.Style>
</Image>

为什么要向我表明这一点?

Answer 1

Triggers converter ,将无效价值改为违约值。

Answer 2

你们可以使用视觉国家而不是物体。视窗的三叉车 8 这里是法典

 <ControlTemplate TargetType="Button">
<VisualStateGroup.Transitions>

  <!--Take one half second to transition to the PointerOver state.-->
  <VisualTransition To="PointerOver" 
                      GeneratedDuration="0:0:0.5"/>
</VisualStateGroup.Transitions>

<VisualState x:Name="Normal" />

<VisualState x:Name="PointerOver">
<Storyboard> 
<ColorAnimation Storyboard.TargetName="ButtonBrush" 
Storyboard.TargetProperty="Color" To="Red" />
 </Storyboard> 
</VisualState> 
</VisualStateGroup>
</VisualStateManager.VisualStateGroups> 
  <Grid.Background>
<SolidColorBrush x:Name="ButtonBrush" Color="Green"/>
 </Grid.Background>
</Grid>
 </ControlTemplate>

友情链接