当焦点位于按钮上时处理按下键盘上的向上箭头 [英] Handle pressing up arrow on keyboard when focus is on button

问题描述

当用户按下键盘上的向上箭头，而按钮具有焦点时，我必须捕捉.我编写了这段代码来处理按钮的 KeyUp 事件:

I have to catch when the user is pressing the up arrow on the keyboard, while the button has the focus. I have written this code to handle the KeyUp event for the button:

private void btnValider_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Up)
    {
        //do stuff
    }
}

但是这个函数没有处理按下向上箭头键.

but this function didn't handle pressing the up arrow key.

我不知道我想做的事情是否可行，或者我是否必须从表单中处理这个事件?

I don't know if it what i want to do is possible or if i have to handle this event from the form ?

推荐答案

As Hans Passant 建议，

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
        if (keyData == Keys.Up && btnValider.Focused)
        {
            MessageBox.Show("hit");

            return true;
        }
        else
            return base.ProcessCmdKey(ref msg, keyData);
    }

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