WPF 获取键盘点击值、组合键方式

在xmal.cs文件中实现，或者重写OnPreviewKeyDown()方法：

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string codeValue = "";   int InputCount = 0; protected override void OnPreviewKeyDown(KeyEventArgs e) {     int keyValue = Convert.ToInt32(e.Key);     if (keyValue == 156)     keyValue = Convert.ToInt32(e.SystemKey);     if (e.Key == Key.Up)     {          e.Handled = true;          ScrollToVerticalOffset("up");     }     if (e.Key == Key.Down)     {          e.Handled = true;          ScrollToVerticalOffset("down");     }<br><br>　　<br>　　　//获取组合键，如Shift+F1【操作：按下Shift，同时按下F1】<br>　　//获取数字组合键，如200，201等【操作：依次按2 0 0 】     if (e.Key.ToString().Contains("NumPad") || (keyValue >= 34 && keyValue <= 43))     {                 string keyCode = e.Key.ToString().Substring(e.Key.ToString().Length - 1, 1);                 if (int.TryParse(keyCode, out int tmp))//如果转换失败（为false）时输出括号内容                 {                     codeValue += keyCode;                     InputCount += 1;                 }                 else                 {                     codeValue = "";                     InputCount = 0;                 }                   if (Core.Definition.QuickKeyManager.Instance.Exec(this.GetType(), 0, codeValue))                 {                     e.Handled = true;                     codeValue = "";                     InputCount = 0;                 }                   if (InputCount == 3)                 {                     codeValue = "";                     InputCount = 0;                 }                 return;   }   if (Core.Definition.QuickKeyManager.Instance.Exec(this.GetType(), keyValue))       e.Handled = true;     codeValue = "";   InputCount = 0;   base.OnPreviewKeyDown(e);<br>}

　　　　if (e.KeyStates == Keyboard.GetKeyStates(Key.F1) && Keyboard.Modifiers == ModifierKeys.Shift)
　　　　{
　　　　　　codeValue = "Shift+F1";

　　　　}

 

Key_Down事件

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protected override void OnKeyDown(KeyEventArgs e) {      if(vm.AuthorizeDialogModel.IsAuthorityCard)      {           Key key = (e.Key == Key.System ? e.SystemKey : e.Key);           CodeHelper.AnalysisKey(e.Key);//分析按键      }      else      {           switch (e.Key)           {                case Key.Escape:                    if (this.DataContext is ViewModels.Dialogs.AuthorizeDialogViewModel vm)                         vm.CloseCommand?.Execute();                         e.Handled = true;                         break;                 case Key.F1:                         server.Focus();                         e.Handled = true;                         break;                 case Key.F5:                         port.Focus();                         e.Handled = true;                         break;                 case Key.Enter:                         if (server.IsFocused)                         {                             port.Focus();                           }                         else if ((port.IsFocused || cardNumber.IsFocused) && btn.IsEnabled)                         {                             btn_Click(btn, null);                         }                         e.Handled = true;                         break;                 }            }                        base.OnKeyDown(e);         }

 

 

Key curretnKey = e.Key == Key.ImeProcessed ? e.ImeProcessedKey : e.Key;
if (QuickKeyManager.Instance.Exec(GetType(), Convert.ToInt32(curretnKey)))
{
e.Handled = true;
}