WPF：如何从Button的DataTemplate设置bool为true？ [英] WPF: How to set bool to true from DataTemplate for Button?

问题描述

我知道可以通过与ICommand一起使用来做到这一点，但是由于这是我整个项目中唯一需要这样做的地方，所以我问自己，是否有比实现RelayCommand和ICommand和

I know it is possible to do this by working with ICommand, but since this is the only place in my whole project where this is needed, I am asking myself, if there is maybe a better solution than implementing RelayCommand and ICommand and an additional method in my otherwise property-only class?

也许我的情况可能对这里有帮助：
我有一个ListView绑定到一个属性列表（这是我制作来展示这些的自定义类）。
在每行条目中都有一个按钮，我想将 IsToDelete -Property设置为true。

Maybe my scenario may help here: I have a ListView which is bound to a list of properties (this is a custom-class I made to display those). I have a button in eacht row of entries, that I want to set the "IsToDelete"-Property to true.

如果 IsToDelete为true，我在ListView中显示的所有控件都将折叠。

If "IsToDelete" is true, all the controls I show in my ListView will collapse.

在DataTemplates中，整个逻辑到此为止，我按钮的外观如下：

The whole logic is up to this point in DataTemplates, the one for my button looks like this:

<DataTemplate x:Key="DeleteButtonTemplate">
  <Button Name="bt_Delete" 
   Command="{Binding RelativeSource={RelativeSource AncestorType=ListView}, Path=ItemSource.DeleteClicked}">
    <Image Height="16" Width="16" Source="Images\RecycleBin\VSO_RecycleBin_16x.png"/>
    <Button.Style>
      <Style TargetType="{x:Type Button}">
        <Style.Triggers>
          <DataTrigger Binding="{Binding IsToDelete}" Value="True">
            <Setter Property="Visibility" Value="Collapsed"/>
          </DataTrigger>
        </Style.Triggers>
      </Style>
    </Button.Style>
  </Button>
</DataTemplate>

请注意，此DataTemplate中的命令当前未按预期运行，这就是为什么我什至问题;）

Note the command in this DataTemplate is currently not working as intended, that is why I even got to the question ;)

在最佳情况下，我只需要做以下事情：

In the optimal case I'd just have to do something like:

<Setter Property="{Binding IsToDelete}" Value="True"/>

因此，有没有办法像这样解决问题，或者至少比ICommand复杂

So, is there a way to solve it like this or at least in a less complicated way than ICommand with RelayCommand?

推荐答案

为什么不使用 ToggleButton 并绑定<$ c将$ c> IsChecked 属性更改为viewModel的 IsToDelete 属性？

why not use ToggleButton and bind IsChecked property to IsToDelete property of a viewModel?

简化示例 ItemsControl

<ItemsControl>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <ToggleButton Content="X" IsChecked="{Binding Path=IsToDelete}"/>
                <Border Width="100"                                
                        Background="MediumPurple" 
                        Margin="5">

                    <Border.Style>
                        <Style TargetType="Border">
                            <Setter Property="Visibility" Value="Visible"/>
                            <Style.Triggers>                                        
                                <DataTrigger Binding="{Binding Path=IsToDelete}" Value="True">
                                    <Setter Property="Visibility" Value="Collapsed"/>
                                </DataTrigger>
                            </Style.Triggers>
                        </Style>
                    </Border.Style>

                </Border>
            </StackPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>            
</ItemsControl>

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