列表框SelectionChanged在其ItemTemplate中不使用Button

时间:2013-09-23 10:59:06

标签: c# wpf listbox selectionchanged

当我在列表框中选择项目时,下面的代码不起作用,你碰巧知道为什么吗?

<ListBox BorderBrush="Transparent" Background="Transparent" Name="listbox" HorizontalAlignment="Center" VerticalAlignment="Center" ScrollViewer.HorizontalScrollBarVisibility="Disabled" SelectionChanged="selection_changed">
    <ListBox.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapPanel/>
        </ItemsPanelTemplate>
    </ListBox.ItemsPanel>
    <ListBox.ItemTemplate>
        <DataTemplate> 
            <Button Height="90" Width="150" Template="{StaticResource cbutton}"/>                
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox> 

模板cbutton看起来像这样

 <ControlTemplate x:Key="cbutton" TargetType="Button">
            <Border CornerRadius="3" BorderThickness="3.5" BorderBrush="White">
                <Border.Background>
                    <LinearGradientBrush EndPoint="1,1" StartPoint="0,0">
                        <GradientStop Color="DarkOrange" Offset="0.1"/>
                        <GradientStop Color="Orange" Offset="0.85"/>
                    </LinearGradientBrush>
                </Border.Background>
                <TextBlock FontWeight="ExtraBold" Foreground="White" TextAlignment="Center" TextWrapping="Wrap" FontSize="15" Text="{Binding name}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
            </Border>
        </ControlTemplate>

2 个答案:

答案 0 :(得分:1)

SelectionChanged事件未被触发,因为按钮是捕获鼠标点击的控件,而不是ListBox

您可以将事件处理程序设置为按钮的单击事件。

   <Button Height="90" Width="150" Click="myClickEventHandler"/>  

无论如何,我建议您使用MVVM,而不是Code-Behind事件处理程序。

您可以设置一个命令,当按钮单击时将触发该命令并发送命令按钮的内容,例如

  <Button Name="myButton" Height="90" Width="150" Template="{StaticResource cbutton}">     
      <i:Interaction.Triggers>
             <i:EventTrigger EventName="SelectionChanged">
                   <i:InvokeCommandAction Command="{Binding DoSomething}"  CommandParameter="{Binding ElementName=myButton, Path=Content}"/>
            </i:EventTrigger>
      </i:Interaction.Triggers>
  </Button>

视图模型

DoSomething = new DelegateCommand<object>(content=> 
{
    // Do whatever you want 

});

如果你不熟悉MVVM,它需要一些时间来学习它,但它绝对值得:)

答案 1 :(得分:1)

您可以在ListBoxItem上添加PreviewMouseDown事件处理程序:

# If you are using an older version of bash, you'll need
# to set the extglob option first.
# shopt -s extglob
if [[ ${ALLVERSION[i]} == /dir/test_*(!(_))_*(!(_)) ]]; then
    unset ALLVERSION[i] 
fi