WPF WebBrowser在按下ALT + Key时触发按钮快捷方式

Question

我对WPF有一个非常奇怪的问题。

一个简单的窗口，带有带快捷方式（“ _Ok”）和Webbrowser控件的按钮。 问题是：当光标按在Web浏览器内的文本区域中时，当我按“ o”时，wpf会在我按Alt + O时触发按钮单击

这是Windows1.xaml的XAML：

<Window x:Class="testBrowser.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>
    <Grid.ColumnDefinitions>
      <ColumnDefinition Width="*" />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
      <RowDefinition Height="*" />
      <RowDefinition Height="Auto" />
      <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>

    <WebBrowser Name="m_Browser" Focusable="False" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" 
                Margin="0"/>

    <TextBox Name="m_Text" Grid.Row="1" />
    <Button Name="m_Ok" Content="_Ok" Click="m_Ok_Click" Grid.Row="2" />
  </Grid>
</Window>

以及后面的代码（只需设置浏览器内容）：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace testBrowser
{
  /// <summary>
  /// Interaction logic for Window1.xaml
  /// </summary>
  public partial class Window1 : Window
  {
    public Window1()
    {
      InitializeComponent();

      m_Browser.NavigateToString("<textarea cols=\"20\" rows=\"10\"/>");
    }

    private void m_Ok_Click(object sender, RoutedEventArgs e)
    {
      MessageBox.Show("Ok pressed");
    }
  }
}

编辑：使用此代码修复：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace testBrowser
{
  /// <summary>
  /// Interaction logic for Window1.xaml
  /// </summary>
  public partial class Window1 : Window
  {
    public Window1()
    {
      InitializeComponent();

      EventManager.RegisterClassHandler(typeof(UIElement), AccessKeyManager.AccessKeyPressedEvent, 
                                        new AccessKeyPressedEventHandler(OnAccessKeyPressed));

      m_Browser.NavigateToString("<textarea cols=\"20\" rows=\"10\"/>");
    }

    private void m_Ok_Click(object sender, RoutedEventArgs e)
    {
      MessageBox.Show("Ok pressed");
    }

    private static void OnAccessKeyPressed(object sender, AccessKeyPressedEventArgs e)
    {    
      if ((Keyboard.Modifiers & ModifierKeys.Alt) != ModifierKeys.Alt) {
        e.Target = null;
        e.Handled = true;
      }
    }
  }
}

Answer 1

根据以下链接： AccessKey Pressed事件在WPF中无需ALT助记符而无需按Alt键的情况下按访问键时触发 。

线程中有人谈论过在.net 4.0中对此进行了更改，但是这就是我对其进行测试的内容，因此似乎没有。

该线程描述了一种可能对您有用的方法。