是否可以将ListBox ContextMenu的CommandParameter绑定到ListBox的所选项？需要说明的是，ContCommand在主窗口中，并且在单击上下文菜单项时被调用 - 但是，我需要使参数正常工作。
我尝试了这个但绑定失败了：
<Window x:Class="ListBoxContextMenu.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:ListBoxContextMenu"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<StackPanel>
<TextBlock Text="ListBox here:"/>
<ListBox ItemsSource="{Binding Items}" MinHeight="100" TabIndex="0" x:Name="LB">
<ListBox.ContextMenu>
<ContextMenu>
<MenuItem Header="Foo" Command="{Binding ContCommand}" CommandParameter="{Binding RelativeSource={RelativeSource AncestorType={x:Type ListBox}},Path=SelectedItem}"/>
</ContextMenu>
</ListBox.ContextMenu>
</ListBox>
</StackPanel>
</Grid>
</Window>
MainWindow 的 C# 代码：
using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Input;
using MvvmFoundation.Wpf;
namespace ListBoxContextMenu
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DataContext = this;
Loaded += (sender, e) => MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
ContCommand = new RelayCommand<object>((object o) =>
{
System.Diagnostics.Debug.WriteLine("Context Menu pressed");
});
}
public ObservableCollection<string> Items { get; set; } = new ObservableCollection<string>{"Fred", "Jim", "Sheila"};
public RelayCommand<object> ContCommand { get; set; }
}
}
using/NameSpace和 Window 属性。只关注于对读者有用的核心部分。 - ΩmegaMan