在Windows窗体应用程序中实现键盘快捷键的最佳方法?

您可能忘了设置表单的 KeyPreview 属性设置为True。凌驾 ProcessCmdKey()

protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
  if (keyData == (Keys.Control | Keys.F)) {
    MessageBox.Show("What the Ctrl+F?");
    return true;
  }
  return base.ProcessCmdKey(ref msg, keyData);
}

在你的主窗体上

1. 设置 KeyPreview 真实

2. 使用以下代码添加KeyDown事件处理程序

   private void MainForm_KeyDown(object sender, KeyEventArgs e)
   {
       if (e.Control && e.KeyCode == Keys.N)
       {
           SearchForm searchForm = new SearchForm();
           searchForm.Show();
       }
   }
   

最好的方法是使用菜单助记符,即在主窗体中设置菜单项,并为其指定所需的键盘快捷键。然后所有其他事情都在内部处理,您所要做的就是实现在 Click 该菜单项的事件处理程序。

您甚至可以尝试以下示例:

public class MDIParent : System.Windows.Forms.Form
{
    public bool NextTab()
    {
         // some code
    }

    public bool PreviousTab()
    {
         // some code
    }

    protected override bool ProcessCmdKey(ref Message message, Keys keys)
    {
        switch (keys)
        {
            case Keys.Control | Keys.Tab:
              {
                NextTab();
                return true;
              }
            case Keys.Control | Keys.Shift | Keys.Tab:
              {
                PreviousTab();
                return true;
              }
        }
        return base.ProcessCmdKey(ref message, keys);
    }
}

public class mySecondForm : System.Windows.Forms.Form
{
    // some code...
}

如果你有菜单,那么改变 ShortcutKeys ToolStripMenuItem 我们应该做到这一点。

如果没有,您可以创建一个并设置其 visible

在主窗体中,您必须:

• 一定要做好准备 按键预览 到 符合事实的 (默认情况下为TRUE)
• MainForm_键关闭 (..)-您可以在此处设置任何想要的快捷方式。

我认为您必须使用user32.dll

protected override void WndProc(ref Message m)
{
    base.WndProc(ref m);

    if (m.Msg == 0x0312)
    {
        /* Note that the three lines below are not needed if you only want to register one hotkey.
         * The below lines are useful in case you want to register multiple keys, which you can use a switch with the id as argument, or if you want to know which key/modifier was pressed for some particular reason. */

        Keys key = (Keys)(((int)m.LParam >> 16) & 0xFFFF);                  // The key of the hotkey that was pressed.
        KeyModifier modifier = (KeyModifier)((int)m.LParam & 0xFFFF);       // The modifier of the hotkey that was pressed.
        int id = m.WParam.ToInt32();                                        // The id of the hotkey that was pressed.


        MessageBox.Show("Hotkey has been pressed!");
        // do something
    }
}

进一步阅读这篇文章 http://www.fluxbytes.com/csharp/how-to-register-a-global-hotkey-for-your-application-in-c/

Hans's answer 对新手来说可能会更容易一些,所以这是我的版本。

你不必愚弄我 KeyPreview ,将其设置为 false form1_load 和 F5 要让它发挥作用:

protected override void OnKeyPress(KeyPressEventArgs ex)
{
    string xo = ex.KeyChar.ToString();

    if (xo == "q") //You pressed "q" key on the keyboard
    {
        Form2 f2 = new Form2();
        f2.Show();
    }
}

在WinForm中,我们始终可以通过以下方式获取控制键状态:

bool IsCtrlPressed = (Control.ModifierKeys & Keys.Control) != 0;