wpf - 如何在 GridView 单元格中找到元素的 ListView 行？

Question

我在网格视图单元格中嵌入了一个组合框，该单元格随后嵌入到 ListView 对象中。加载窗口时，组合框从我的容器类列表中获取值并填充组合框。这工作正常，但什么 我希望能够在触发 SelectionChanged 事件时确定组合框的列表视图索引。

<ComboBox x:Name="TransFileOpt" ItemsSource="{Binding ComboBoxOptions}" SelectedIndex="{Binding SelectedIndex}" SelectionChanged="ComboBoxSelectionChanged"/>

当我之前搜索过这个时，所有结果都指向 System.Windows.Forms.ListView，而我正在使用 System.Windows.Controls.ListView，所以 m_ListView.Rows[index] 不起作用。

基本上，我需要一种方法来获取包含调用 ComboBoxSelectionChanged 的​​组合框的 ListView 索引或项目（在触发 SelectionChanged 事件时）。

ListView 块：

    <ListView Name="m_ListView" ItemsSource="{Binding Tables}" Margin="0,28,0,132" SelectionMode="Extended" SelectedIndex="0" 
              RenderTransformOrigin="0.503,0.468" ScrollViewer.HorizontalScrollBarVisibility="Disabled"
              SelectionChanged="ListView_SelectionChanged">
        <ListView.View>
            <GridView x:Name="m_TableGridView" AllowsColumnReorder="False"  >
                <GridViewColumn Width="50" Header="Loaded">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <CheckBox IsChecked="{Binding Loaded}"></CheckBox>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
                <GridViewColumn Width="150" Header="Master File" DisplayMemberBinding ="{Binding MasterFileName}"/>
                <GridViewColumn Width="200" Header ="Translation File" >
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox x:Name="TransFileOpt" ItemsSource="{Binding ComboBoxOptions}" 
                                      SelectedIndex="{Binding SelectedIndex}" SelectionChanged="ComboBoxSelectionChanged"/>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
            </GridView>
        </ListView.View>
        <ListView.Resources>
            <Style TargetType="{x:Type TextBlock}">
                <Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=Text }"></Setter>
            </Style>
            <Style TargetType="ListViewItem">
                <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
            </Style>
        </ListView.Resources>
    </ListView>

其他信息：该项目是通过 Visual Studio 的 wpf 编辑器生成的，该编辑器默认为 System.Windows.Controls 用于类。

Answer 1

这是一个适合您的工作示例：

<Window x:Class="ListViewGridView.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Grid>
    <ListView Margin="10" Name="lvUsers" ItemsSource="{Binding  items}">
        <ListView.View>
            <GridView>
                <GridViewColumn Header="Items" Width="150">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <ComboBox ItemsSource="{Binding containerItems}" SelectionChanged="ComboBox_SelectionChanged">
                                <ComboBox.ItemTemplate>
                                    <DataTemplate>
                                        <TextBlock Text="{Binding}"/>
                                    </DataTemplate>
                                </ComboBox.ItemTemplate>
                            </ComboBox>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
            </GridView>
        </ListView.View>
    </ListView>
</Grid>

代码隐藏：

public partial class MainWindow : Window
{
    public ObservableCollection<ItemContainer> items { get; set; }

    public MainWindow()
    {
        InitializeComponent();
        items = new ObservableCollection<ItemContainer>();

        items.Add(new ItemContainer() { containerItems = new List<string>() { "Item1", "Item2", "Item3" } });
        items.Add(new ItemContainer() { containerItems = new List<string>() { "Item4", "Item5", "Item6" } });

        this.DataContext = this;
    }


    public static T FindAncestorOrSelf<T>(DependencyObject obj)
        where T : DependencyObject
    {
        while (obj != null)
        {
            T objTest = obj as T;

            if (objTest != null)
                return objTest;

            obj = VisualTreeHelper.GetParent(obj);
        }
        return null;
    }

    private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        ListViewItem lvItem = FindAncestorOrSelf<ListViewItem>(sender as ComboBox);
        ListView listView = ItemsControl.ItemsControlFromItemContainer(lvItem) as ListView;
        int index = listView.ItemContainerGenerator.IndexFromContainer(lvItem);
        Console.WriteLine(index.ToString());
    }
}

还有简单的模型类：

public class ItemContainer
{
    public List<string> containerItems { get; set; }
}

就是这样。玩得开心！