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.net 选择元素时如何应用DataTrigger_.net_Wpf_Winforms_Wpf Controls - Fatal编程技术网
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.net 选择元素时如何应用DataTrigger

.net wpf winforms

.net 选择元素时如何应用DataTrigger,.net,wpf,winforms,wpf-controls,.net,Wpf,Winforms,Wpf Controls,我需要申请 <Setter Property="Source" Value="{Binding ImageUrlHoverString}"/> 当用户在列表框中选择一个项目时 知道怎么做吗 <DataTemplate x:Key="FloorsListboxDataTemplate"> <Image> <Image.Style> <S

我需要申请

 <Setter Property="Source" Value="{Binding ImageUrlHoverString}"/>
当用户在列表框中选择一个项目时

知道怎么做吗

    <DataTemplate x:Key="FloorsListboxDataTemplate">
           <Image>
                <Image.Style>
                    <Style TargetType="{x:Type Image}">
                        <Setter Property="Source" Value="{Binding ImageUrlCurrentString}" />
                        <Style.Triggers>
                            <DataTrigger Value="True" Binding="{Binding IsActive}">
                                <Setter Property="Source" Value="{Binding ImageUrlHoverString}"/>
                            </DataTrigger>
                        </Style.Triggers>
                    </Style>
                </Image.Style>
            </Image>
    </DataTemplate>
使用下面的代码，它不起作用

...
                                <DataTrigger Binding="{Binding IsSelected}">
                                    <Setter Property="Source" Value="{Binding ImageUrlHoverString}"/>
                                </DataTrigger>
...

。。。
...
您可以将
DataTrigger
与
RelativeSource
绑定到
ListBoxItem。IsSelected
：

<Image>
   <Image.Style>
      <Style TargetType="{x:Type Image}">
         <Setter Property="Source" Value="{Binding ImageUrlCurrentString}" />
         <Style.Triggers>
            <DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}}, Path=IsSelected}" Value="True">
               <Setter Property="Source" Value="{Binding ImageUrlHoverString}"/>
            </DataTrigger>
         </Style.Triggers>
      </Style>
   </Image.Style>
</Image>
您可以像这样简单地应用数据触发器

           <Image.Style>
                <Style TargetType="{x:Type Image}">
                    <Setter Property="Source" Value="{Binding ImageUrlCurrentString}" />
                    <Style.Triggers>
                       <Style.Triggers>
                        <DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}}, Path=IsSelected}" Value="True">
                         <Setter Property="Source" Value="{Binding ImageUrlHoverString}"/>
                        </DataTrigger>
                     </Style.Triggers>
                    </Style.Triggers>
                </Style>
            </Image.Style>
使用您的代码，我发现此错误无法在类型“System.Windows.Controls.Image”上找到样式属性“IsSelected”。