KeyDown处理C#/UWP [英] KeyDown Handling C# / UWP
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问题描述
我正在尝试使应用向中继发送脉冲.我可以通过Button_click完成操作,但是现在我想通过任何击键操作完成操作.我可以用来做什么? 我了解了KeyDown,但我真的不知道如何集成它,任何帮助将不胜感激.预先谢谢你!
I'm Trying to make app send a pulse to a relay. I got it done with a Button_click, but now I want to do it with any keystroke. What Can I use for this? I read about KeyDown but I don't really know how to integrate it, Any help would be much appreciated. Thank you in advance!
这是我的代码的样子:
private void Button_Click(object sender, RoutedEventArgs e)
{
if (relay_state == 0)
{
relayPin.Write(GpioPinValue.Low);
relay_state = 1;
}
else if (relay_state == 1)
{
relayPin.Write(GpioPinValue.High);
relay_state = 0;
}
推荐答案
您可以将KeyDown事件侦听器添加到您的页面:
You can add KeyDown event listener to your page:
protected override void OnNavigatedTo(NavigationEventArgs e)
{
CoreWindow.GetForCurrentThread().KeyDown += Page_KeyDown;
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
CoreWindow.GetForCurrentThread().KeyDown -= Page_KeyDown;
}
private void Page_KeyDown(CoreWindow sender, KeyEventArgs args)
{
//Do your stuff here!
System.Diagnostics.Debug.WriteLine("Pressed Key");
}
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