动态生成的按钮似乎不会触发它们的命令

本文关键字：命令 按钮 动态 | 更新日期: 2023-09-27 18:11:21

我有一个在运行时动态填充的ListBox。它有一个RequirementPreview的DataType，它需要将某些属性绑定到触发器、源和参数。但是，有一个命令绑定需要触发在数据上下文中设置的命令，但与模板数据类型无关。

我想要的是Button触发'RevertDelete'命令并发送按钮所属的RequirementPreview的Guid。到目前为止，我按下按钮什么也没发生。

Xaml: 

<ListBox Grid.Row="1" Grid.ColumnSpan="3" Margin="5" IsEnabled="{Binding IsEnabled}" ItemsSource="{Binding Requirements}" SelectionMode="Extended">
   <i:Interaction.Triggers>
      <i:EventTrigger EventName="SelectionChanged">
          <cmd:EventToCommand Command="{Binding SelectionChanged}"/>
      </i:EventTrigger>
   </i:Interaction.Triggers>
   <ListBox.ItemContainerStyle>
      <Style TargetType="ListBoxItem">
         <Style.Triggers>
            <DataTrigger Binding="{Binding IsDeleted}" Value="True">
                <Setter Property="Foreground" Value="red"/>
            </DataTrigger>
         </Style.Triggers>
         <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
         <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}"/>
      </Style>
   </ListBox.ItemContainerStyle>
      <ListBox.ItemTemplate>
         <DataTemplate DataType="{x:Type myModels:RequirementPreview}">
            <Grid>
               <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="Auto"/>
                 <ColumnDefinition Width="45"/>
                 <ColumnDefinition Width="*"/>
               </Grid.ColumnDefinitions>
               <TextBlock Grid.Column="0" Text="{Binding Name}" ToolTip="{Binding Name}" HorizontalAlignment="Stretch"/>
               <Button Grid.Column="2" HorizontalAlignment="Right" IsEnabled="{Binding IsEnabled}" Visibility="{Binding IsDeleted, Converter={StaticResource BoolToVisibility}}" 
                                        Command="{Binding RevertDelete}" CommandParameter="{Binding Guid}" Height="10" Width="10"/>
            </Grid>
         </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

Xaml.cs: 

    [Dependency]
    public IMainViewModel ViewModel
    {
        get { return this.DataContext as IMainViewModel; }
        set { this.DataContext = value; }
    }
编辑:

Command="{Binding RelativeSource={x:Static RelativeSource.PreviousData}, Path=RevertDelete}"
Command="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=RevertDelete}"
Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=RevertDelete}

动态生成的按钮似乎不会触发它们的命令

我猜RevertDelete命令不是RequirementPreview类型的一部分，它作为模板的数据上下文。您需要为这个命令使用相对源绑定:

<Button Command="{Binding DataContext.RevertDelete, RelativeSource={RelativeSource AncestorType=ListBox}}" 
        CommandParameter="{Binding Guid}" />
相关文章：