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：

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");
    }

　　
　　　//获取组合键，如Shift+F1【操作：按下Shift，同时按下F1】

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

　　　　}

　　//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);
}        

 

Key_Down事件

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;
}