Question

我的想法是在单击MouseOver或Button等时更改ListboxItem的外观。

<ListBox Name="listbox"
         Height="250"
         Grid.Row="4"
         Grid.ColumnSpan="5"
         HorizontalAlignment="Center">
  <ListBox.ItemContainerStyle>
    <Style TargetType="ListBoxItem">
      <Style.Triggers>
        <Trigger Property="IsMouseOver"
                 Value="True">
          <Setter Property="Template"
                  Value="{StaticResource control_mouseover}" />
        </Trigger>
        <Trigger Property="IsMouseOver"
                 Value="False">
          <Setter Property="Template"
                  Value="{StaticResource control_not_mouseover}" />
        </Trigger>
        <DataTrigger Binding="{Binding ElementName=grid.Artykuły, Path=IsPressed}"
                     Value="True">
          <Setter Property="Template"
                  Value="{StaticResource control_mouseover}" />
        </DataTrigger>
      </Style.Triggers>
    </Style>
  </ListBox.ItemContainerStyle>
</ListBox>

仅限事件IsMouseOver它可以工作，但DataTrigger似乎不起作用你碰巧知道为什么吗？

<ControlTemplate x:Key="control_not_mouseover"
                 TargetType="ListBoxItem">
  <Border BorderBrush="Transparent">
    <ContentPresenter x:Name="contentPresenter"
                      Content="{TemplateBinding Content}"
                      ContentTemplate="{StaticResource not_mouseover}"
                      HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                      Margin="{TemplateBinding Padding}" />
  </Border>
</ControlTemplate>
<ControlTemplate x:Key="control_mouseover"
                 TargetType="ListBoxItem">
  <ContentPresenter x:Name="contentPresenter"
                    Content="{TemplateBinding Content}"
                    ContentTemplate="{StaticResource mouseover}"
                    HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                    Margin="{TemplateBinding Padding}" />
</ControlTemplate>
<StackPanel>
  <Grid Name="grid"
        Height="240">
    <Button  Name="Artykuły"
             Grid.Column="0"
             Content="{Binding Path=liczba_wpisow, Converter={StaticResource wpisy_converter}}" /> [...]
  </Grid>
  <Listbox... />
</StackPanel>

Answer 1

我发现您的代码存在许多问题。首先，您不需要为Trigger 和 true条件添加false。相反，你应该这样做：

<ListBox Name="listbox" Height="250" Grid.Row="4" Grid.ColumnSpan="5" HorizontalAlignment="Center">
    <ListBox.ItemContainerStyle>
        <Style TargetType="ListBoxItem">
            <Setter Property="Template" Value="{StaticResource control_not_mouseover}"/>
            <Style.Triggers>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="Template" Value="{StaticResource control_mouseover}"/>
                </Trigger>
                <DataTrigger Binding="{Binding ElementName=grid.Artykuły, Path=IsPressed}" Value="True">
                    <Setter Property="Template" Value="{StaticResource control_mouseover}"/>
                </DataTrigger>                  
            </Style.Triggers>
        </Style>
    </ListBox.ItemContainerStyle>
</ListBox>

但是，这应该不导致实际错误。

第二个问题是ElementName属性显示设置为相关控件的实际name，而不是类型和名称：

<DataTrigger Binding="{Binding ElementName=Artykuły, Path=IsPressed}" Value="True">
    <Setter Property="Template" Value="{StaticResource control_mouseover}"/>
</DataTrigger>

更新＆gt;＆gt;＆gt;

要永久应用Template，而不是仅在按下Button时使用DataTrigger，只需移除Setter并将Triggers移出<ListBox Name="listbox" Height="250" Grid.Row="4" Grid.ColumnSpan="5" HorizontalAlignment="Center"> <ListBox.ItemContainerStyle> <Style TargetType="ListBoxItem"> <Setter Property="Template" Value="{StaticResource control_not_mouseover}"/> <Style.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="Template" Value="{StaticResource control_mouseover}"/> </Trigger> </Style.Triggers> </Style> </ListBox.ItemContainerStyle> </ListBox>即可收集：

Setter

不幸的是，你的{{1}}价值发生了冲突，所以我不得不交换它们以使其以这种方式运作，但我相信你可以按照自己的意愿重新安排它。

Answer 2

Binding="{Binding ElementName=grid.Artykuły

<Button  Name="Artykuły"

- ＆GT; ElementName与您的元素名称不匹配。

应该是：

Binding="{Binding ElementName=Artykuły

DataTrigger不会更改ListBox的ItemContainerStyle中的模板

2 个答案: