如何检测 WPF 中按下的键？

Question

我用 WPF 编写了一个带有几个按钮的桌面应用程序。它到目前为止有效，但现在我想 link 按钮到键。我希望程序检测是否按下了按钮，然后执行 Button_click 方法。我试图通过添加此方法来实现此目的

public void Window1_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
    {
        switch (e.Key)
        {
            case Key.D0:
                Button0_Click(new object(), new RoutedEventArgs());
                break;
            case Key.D1:
                Button1_Click(new object(), new RoutedEventArgs());
                break;
            case Key.D2:
                Button2_Click(new object(), new RoutedEventArgs());
                break;
            case Key.D3:
                Button2_Click(new object(), new RoutedEventArgs());
                break;
            case Key.D4:
                Button4_Click(new object(), new RoutedEventArgs());
                break;
        }
    }

但是根本没有用。我怎样才能 link 定义按键方法到按键？

Answer 1

您需要实施 key event handler 例如对于键 Enter

Refer to Microsoft docs here

XAML代码

<StackPanel>
 <TextBlock Width="300" Height="20">
    Type some text into the TextBox and press the Enter key.
  </TextBlock>
  <TextBox Width="300" Height="30" Name="textBox1"
           KeyDown="OnKeyDownHandler"/>
  <TextBlock Width="300" Height="100" Name="textBlock1"/>
</StackPanel>

后端的关键事件处理程序

private void OnKeyDownHandler(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Return)
    {
       //do your things here 
    }
}

Answer 2

在加载主要 window 时创建一个事件：

在 XAML 中：

Loaded="MainWindow_Loaded"

在后面的代码中：

  private void MainWindow_Loaded(object sender, RoutedEventArgs e) 
  {
    var window = Window.GetWindow(this);
    window.KeyDown += HandleKeyPress;
  }

处理您的按键事件：

private void HandleKeyPress(object sender, KeyEventArgs e) 
{
   switch (e.Key)
    {
        case Key.D0:
            Button0_Click(new object(), new RoutedEventArgs());
            break;
        case Key.D1:
            Button1_Click(new object(), new RoutedEventArgs());
            break;
            ....
}

如何检测 WPF 中按下的键？

How to detect a pressed key in WPF?

c#

wpf

uikeyinput