小编Chr*_*wne的帖子

我有一个MenuItem,其中ItemsSource被数据绑定到一个简单的字符串列表,它显示正确,但我很难看到我如何处理它们的点击事件!

这是一个演示它的简单应用程序:

<Window x:Class="WPFDataBoundMenu.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<Grid>
    <Menu>
        <MenuItem Header="File" Click="MenuItem_Click" />
        <MenuItem Header="My Items" ItemsSource="{Binding Path=MyMenuItems}" />
    </Menu>
</Grid>

using System.Collections.Generic;
using System.Windows;

namespace WPFDataBoundMenu
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public List<string> MyMenuItems { get; set;}

        public Window1()
        {
            InitializeComponent();
            MyMenuItems = new List<string> { "Item 1", "Item 2", "Item 3" };
            DataContext = this;
        }

        private void MenuItem_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("how …

我现在仍在摸索WPF,并且无法弄清楚为什么禁用此上下文菜单项:

<Window x:Class="DisabledMenuItemProblem.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:DisabledMenuItemProblem"
        Title="Window1" Height="300" Width="300">
    <TextBlock Text="fooooobaaaaaar">
        <TextBlock.ContextMenu>
            <ContextMenu>
                <MenuItem Header="Foo" Command="{x:Static local:MyCommands.FooBar}" />
            </ContextMenu>
        </TextBlock.ContextMenu>
    </TextBlock>
</Window>

using System.Windows;
using System.Windows.Input;

namespace DisabledMenuItemProblem
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
            CommandBindings.Add(new CommandBinding(MyCommands.FooBar, FooExecuted, CanFooExecute));
        }

        public void FooExecuted(object sender, ExecutedRoutedEventArgs e)
        { MessageBox.Show("Foo!"); }

        public void CanFooExecute(object sender, CanExecuteRoutedEventArgs e)
        { e.CanExecute = true; }
    }

    public static class MyCommands
    { 
        public static RoutedCommand FooBar = new RoutedCommand(); 
    }
} …

对于linq的世界来说还是新手,我需要一些帮助,将有孩子的父母列表整理成一个ParentChild列表.

像这样:

class Program
{
    static void Main()
    {
        List<Parent> parents = new List<Parent>();

        parents.Add(new Parent { Name = "Parent1", Children = new List<Child> { new Child { Name = "Child1" }, new Child { Name = "Child2" } } });
        parents.Add(new Parent { Name = "Parent2", Children = new List<Child> { new Child { Name = "Child3" }, new Child { Name = "Child4" } } });

        // linq query to return List<ParentChild> parentChildList;
        // ParentName = Parent1, ChildName …