自定义控件如何直接获取键盘（外置键盘和触摸键盘）的输入内容

Question

现在在开发一个win8/rt平台的类似远程桌面的软件，用Image控件作为显示界面。现在的问题是无法直接获取键盘的输入内容，所以暂时的做法是先把内容输入到textbox上，然后再把字符串发送到服务器。



http://code.msdn.microsoft.com/windowsapps/Touch-keyboard-sample-43532fda 这例子提供了一个简单的demo，但是似乎不起作用，不知道是不是我的使用方式有问题。

Answer 1

Hi, caozhongqian

Input: Touch keyboard 这个sample是起作用的，请看这个sample的CustomControl1.xaml.cs里面的OnKeyDown函数：

 protected override void OnKeyDown(KeyRoutedEventArgs e)
        {   
           
            this.myTextBlock.Text = "A key was pressed @ " + DateTime.Now.ToString();
        }

它并没有获取当前按下的键盘的内容，您可以在里面获取：

 protected override void OnKeyDown(KeyRoutedEventArgs e)
        {   
           
            this.myTextBlock.Text = e.Key+"A key was pressed @ " + DateTime.Now.ToString();
        }

其中e.key就是获取当前的按键内容。

您可以参考一下以下链接

http://msdn.microsoft.com/en-us/library/windows/apps/hh868246.aspx

祝您好运！

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Answer 2

Hi，Keydown这个事件只会在用触摸键盘时执行，如果是外置键盘是没有效果的。但最大的问题不是在这里。如果我们要输入中文呢？比如现在我们要输入“中国”，按照使用win8自带输入发的习惯，我们这时只需要输入zg,输入发就会自动联想“中国 XX1 XX3...”,时候需要用户选择“中国”。  我的测试结果是用触摸键盘keydown这个事件会被触发两次,e.Key 为"Z"和"G",一点帮助都没有。我现在的想要的效果获取到用户选择的 “中国”，请问有没有方法？ 

Answer 3

Hi,

sample的CustomControl1的xaml里面是定义了一个TextBlock 控件，如果您改为TextBox控件的话应该是会支持中文的输入的。

您具体想实现什么呢？能否详细的描述一下！

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Answer 4

HI，可能是我描述的不够清楚，所以让您误解了。我现在想要这么一个效果：自定义一个控件，当调用该控件的某个接口后键盘自动弹出（比如textbox.Focus()），并接收键盘输入（包括中英文），但是这些输入的字符内容是不显示在控件上的，而是直接发送到服务器上处理的？