c# – 将密钥转换为VirtualKeyCode

发布时间：2020-12-16 01:54:03 所属栏目：百科来源：网络整理

导读：在我的C#/ WPF / .NET 4.5应用程序中,我试图通过KeyEventHandler捕获按键,然后使用优秀的 Windows Input Simulator模拟按键(将手势,语音等命令映射到键盘). 麻烦的是,我从KeyEventHandler的RoutedEventArgs中获取Key枚举的成员,但后来我需要将VirtualKeyCode

在我的C#/ WPF / .NET 4.5应用程序中,我试图通过KeyEventHandler捕获按键,然后使用优秀的 Windows Input Simulator模拟按键(将手势,语音等命令映射到键盘).

麻烦的是,我从KeyEventHandler的RoutedEventArgs中获取Key枚举的成员,但后来我需要将VirtualKeyCode传递给SimulateKeyPress().

如何从Key转到VirtualKeyCode？

// Trigger reader
private void Editor_CommandButton_Click(object sender,RoutedEventArgs e) {
  PressKeyModal.Visibility = System.Windows.Visibility.Visible;
  AddHandler(Keyboard.KeyDownEvent,(KeyEventHandler)Editor_HandleKeyDownEvent);
}
// Read key press from keyboard
private void Editor_HandleKeyDownEvent(object sender,KeyEventArgs e) {
  // Here is the culprit
  VirtualKeyCode CodeOfKeyToEmulate = ConvertSomehow(e.Key);
  // /culprit
  PressKeyModal.Visibility = System.Windows.Visibility.Hidden;
  RemoveHandler(Keyboard.KeyDownEvent,(KeyEventHandler)Editor_HandleKeyDownEvent);
}

// Later,emulate the key press
private void EmulateKeyPress(VirtualKeyCode codeOfKeyToEmulate( {
  InputSimulator.SimulateKeyPress(codeOfKeyToEmulate);
}

解决方法

似乎 KeyInterop.VirtualKeyFromKey方法正是我所寻找的.因此上面代码中的麻烦部分变成：

// Read key press from keyboard
private void Editor_HandleKeyDownEvent(object sender,KeyEventArgs e) {
  // The rehabilitated culprit
  VirtualKeyCode CodeOfKeyToEmulate = (VirtualKeyCode)KeyInterop.VirtualKeyFromKey(e.Key);
  // /rehabilitated culprit
  PressKeyModal.Visibility = System.Windows.Visibility.Hidden;
  RemoveHandler(Keyboard.KeyDownEvent,(KeyEventHandler)Editor_HandleKeyDownEvent);
}

值得注意的是,KeyInterop.VirtualKeyFromKey方法不返回VirtualKeyCode,而是返回必须强制转换为VirtualKeyCode的int32.

（编辑：李大同）

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