在 UserControl 中捕获 Esc 键 [英] Capture Esc Key in UserControl

问题描述

我想使用 UserControl 创建一个 Custom Popup，因为这是 UWP 应用程序，我想隐藏 Popupcode> 当用户在键盘上按下 ESC 时.

I want to create a Custom Popup using UserControl, because this is UWP apps, I want to hide Popup when user press ESC on Keyboard.

我尝试覆盖 UserControl 的 OnKeyDown 方法，但是当我在键盘上按下 ESC 时，此方法从未执行.

I try to override OnKeyDown method of UserControl but this method never executed when I press ESC on Keyboard.

 protected override void OnKeyDown(KeyRoutedEventArgs e)
 {
    if (e.Key == VirtualKey.Escape)
    {
       this.Visibility = Visibility.Colapse;
    }
 }

推荐答案

我想在用户按键盘上的 ESC 时隐藏弹出窗口.

I want to hide Popup when user press ESC on Keyboard.

在 UWP 应用中，考虑使用 CoreWindow.CharacterReceived 事件

In UWP app, consider using CoreWindow.CharacterReceived event

在 UserControl 中，在 Constructor 方法中添加事件处理程序:

In UserControl, add event handler in the Constructor method:

public CustomPopupControl()
{
            this.InitializeComponent();

            Window.Current.CoreWindow.CharacterReceived += CoreWindow_CharacterReceived;
}

private void CoreWindow_CharacterReceived(CoreWindow sender, CharacterReceivedEventArgs args)
{
            if(args.KeyCode==27) //ESC
            {
        //Do somthing
                this.Visibility = Visibility.Collapsed;
            }
}

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