在整个应用程序中捕获按键 [英] Capture key press in whole application

问题描述

是否有可能捕获(我猜是在app.xaml.cs中的某个地方)任何键，如果它按下了打开的窗口?

Is it possible, to capture (somewhere in app.xaml.cs i guess) any key and if it pressed open window?

感谢帮助！

推荐答案

您可以使用此要点注册一个全局钩子.当您的应用程序运行时，只要按下给定的键，它将触发.您可以像这样在App类中使用它:

You could use something like this gist to register a global hook. It will fire whenever the given keys are pressed while your application is running. You can use it in your App class like this:

public partial class App
{
    private HotKey _hotKey;

    protected override void OnActivated(EventArgs e)
    {
        base.OnActivated(e);
        RegisterHotKeys();
    }

    protected override void OnExit(ExitEventArgs e)
    {
        base.OnExit(e);
        UnregisterHotKeys();
    }

    private void RegisterHotKeys()
    {
        if (_hotKey != null) return;

        _hotKey = new HotKey(ModifierKeys.Control | ModifierKeys.Shift, Key.V, Current.MainWindow);
        _hotKey.HotKeyPressed += OnHotKeyPressed;
    }

    private void UnregisterHotKeys()
    {
        if (_hotKey == null) return;

        _hotKey.HotKeyPressed -= OnHotKeyPressed;
        _hotKey.Dispose();
    }

    private void OnHotKeyPressed(HotKey hotKey)
    {
        // Do whatever you want to do here
    }
}

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