Windows RT/8中如何判断是否有外接键盘

Question

 KeyboardCapabilities kc = new KeyboardCapabilities();
            string str = string.Empty;
            if (kc.KeyboardPresent == 1)
                str = "有外接键盘";
            else
                str = "没有外接键盘";

kc.KeyboardPresent 无论在有没有键盘的情况下都返回1，google了这个问题，似乎是win8 Api的一个bug。请问还有别的方法能鉴别机器是否有接外接键盘？

Answer 1

Hi,caozhongqian

这个的确是 windows 8 Api 的一个Bug, 以下提供两种方式您可以参考一下：

1.您可以通过枚举device containers的方式来判断Keyboard是否接入,MSDN上有些链接和例子您可以参考：

http://msdn.microsoft.com/en-us/library/windows/apps/hh872189.aspx

http://msdn.microsoft.com/en-us/library/windows/apps/hh967756.aspx

http://code.msdn.microsoft.com/windowsapps/Device-enumeration-sample-ae24680d

2.当您的APP中有一些需要输入的控件时，当您foucus这些控件并要输入时，您也可以通过监测是否会出现on-screen keyboard来发现外接键盘是否接入,请参考以下例子：

http://code.msdn.microsoft.com/windowsapps/Responding-to-the-9de75533

祝您好运！

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Answer 2

谢谢您的详细解答，我现在的做法是监听KeyboardCapabilities对象的showing事件，有一个关于吊起的触摸键盘对应的Rect对象的属性，如果rect对象的Height属性不为0,则表示使用触摸键盘