ListboxItem自我绑定

Question

如何将命令参数绑定到self？

我试着这样：

<ListBox.ItemContainerStyle>
   <Style TargetType="ListBoxItem">
      <Setter Property="Template">
         <Setter.Value>
            <ControlTemplate TargetType="ListBoxItem">
               <Button Content="G"
                       Background="Green"
                       Foreground="White"
                       Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}},
                                 Path=DataContext.LabelGoodCommand}"       
                       CommandParameter="{Binding /}"
                       Width="20" Height="20" />
            </ControlTemplate>
         </Setter.Value>
      </Setter>
   </Style>
</ListBox.ItemContainerStyle>

但这不起作用。 在绑定到ObservableCollection的viewmodel列表框项中。

Answer 1

CommandParameter="{Binding RelativeSource={x:Static RelativeSource.Self}}"

通过这个你可以获得Control并在你的Execute方法中，像这样使用，

if(pram is Button)
{
    var model = ((Button)pram).DataContext;
}

你可以在这里获得模型。

或

           <Button Content="G"
                   Background="Green"
                   Foreground="White"
                   Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}},
                             Path=DataContext.LabelGoodCommand}"       
                   CommandParameter="{TemplateBinding DataContext}"
                   Width="20" Height="20" />

或

<Button Content="G"
                   Background="Green"
                   Foreground="White"
                   Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}},
                             Path=DataContext.LabelGoodCommand}"       
                   CommandParameter="{Binding DataContext,RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}"
                   Width="20" Height="20" />

Answer 2

如果用“self”表示按钮，你可以这样做：

CommandParameter="{Binding RelativeSource={x:Static RelativeSource.Self}}"

如果您想要当前的DataContext，请不要指定路径：

CommandParameter="{Binding}"