作为命令参数传入 WPF ListView GridViewColumn 的值

Question

在 WPF ListView 中，我有 ListViewItem 由三列组成，第一列是自动递增列，第二列是 TextBox，最后一列包含同一列中的两个按钮（编辑和删除）。

我的 ListView 现在看起来如下：

<ListView x:Name="MyListView"
          AlternationCount="{Binding pathList.Count}"
          ItemsSource="{Binding pathList}" 
          IsSynchronizedWithCurrentItem="True">
    <ListView.View>
        <GridView>
            <GridViewColumn Header="#" x:Name="LvItemId"
                            DisplayMemberBinding="{Binding (ItemsControl.AlternationIndex),
                            RelativeSource={RelativeSource AncestorType=ListViewItem}}"/>
            <GridViewColumn Header="Command sentence" Width="350" CellTemplate="{StaticResource NameColumnTemplate}"/>
            <GridViewColumn Width="70" Header="Edit / Delete" CellTemplate="{StaticResource AddDelItemTemplate}"/>
        </GridView>
    </ListView.View>
</ListView>

CellTemplate 下方：

<DataTemplate x:Key="FirstRowTemplate1">
    <Grid Width="190">
        <Button Content="Add" Command="{Binding Path=DataContext.AddCommand, ElementName=MyListView}" 
                Width="180" 
                HorizontalAlignment="Center"/>
    </Grid>
</DataTemplate>
<DataTemplate x:Key="NextRowTemplate1">
    <TextBox Text="{Binding PathString}"/>
</DataTemplate>
<DataTemplate x:Key="NameColumnTemplate">
    <ContentPresenter x:Name="ButtonPresenter"
                      Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Content}"
                      ContentTemplate="{StaticResource NextRowTemplate1}"/>
    <DataTemplate.Triggers>
        <DataTrigger Binding="{Binding Add}" Value="True">
            <Setter TargetName="ButtonPresenter"  
                    Property="ContentTemplate" 
                    Value="{StaticResource FirstRowTemplate1}"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Add}" Value="False">
            <Setter TargetName="ButtonPresenter"
                    Property="ContentTemplate"
                    Value="{StaticResource NextRowTemplate1}"/>
        </DataTrigger>
    </DataTemplate.Triggers>
</DataTemplate>
<DataTemplate x:Key="FirstRowTemplate2"/>
<DataTemplate x:Key="NextRowTemplate2">
    <StackPanel Orientation="Horizontal">
        <Button Content="Edit" Command="{Binding Path=DataContext.EditCommand, ElementName=MyListView}" CommandParameter="{Binding ElementName=LvItemId, Path=WhatToPutHere}"/>
        <Button Content="Delete" Command="{Binding Path=DataContext.DelCommand, ElementName=MyListView}" CommandParameter="{Binding ElementName=LvItemId, Path=WhatToPutHere}"/>
    </StackPanel>
</DataTemplate>
<DataTemplate x:Key="AddDelItemTemplate">
    <ContentPresenter x:Name="ButtonPresenter"
            Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Content}"  
            ContentTemplate="{StaticResource NextRowTemplate2}"/>
    <DataTemplate.Triggers>
        <DataTrigger Binding="{Binding Add}" Value="True">
            <Setter TargetName="ButtonPresenter"
                    Property="ContentTemplate" 
                    Value="{StaticResource FirstRowTemplate2}"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding Add}" Value="False">
            <Setter TargetName="ButtonPresenter"
                    Property="ContentTemplate"
                    Value="{StaticResource NextRowTemplate2}"/>
        </DataTrigger>
    </DataTemplate.Triggers>
</DataTemplate>

单击“编辑”或“删除”按钮时，我想将第一个 GridViewColumn 的值作为命令参数传递给 ListViewItem。我该怎么做？

例如：

<Button Content="Edit" Command="{Binding Path=DataContext.EditCommand, ElementName=MyListView}" CommandParameter="{Binding ElementName=LvItemId, Path=WhatToPutHere}"/>
<Button Content="Delete" Command="{Binding Path=DataContext.DelCommand, ElementName=MyListView}" CommandParameter="{Binding ElementName=LvItemId, Path=WhatToPutHere}"/>

Answer 1

GridViewColumn 定义了列本身，它是如何填充的，例如模板、绑定或宽度，但它没有对项目容器生成器生成的任何项目的引用。

如果是第一列，您可以复制附件的绑定属性 AlternationIndex:

<Button Content="Edit" Command="{Binding (ItemsControl.AlternationIndex), RelativeSource={RelativeSource AncestorType=ListViewItem}}"/>
<Button Content="Delete" Command="{Binding (ItemsControl.AlternationIndex), RelativeSource={RelativeSource AncestorType=ListViewItem}}"/>

作为命令参数传入 WPF ListView GridViewColumn 的值

Passing in as command parameter the value of a WPF ListView GridViewColumn

wpf

listview

data-binding

listviewitem

gridviewcolumn