多键按下 [英] multi keys in key down

问题描述

我希望当我按Ctrl + S时，我的复选框处于选中状态或未选中状态
但是当我只是按下Ctrl键并且在按下S键之前，会触发KeyDown事件
我希望该按下事件应在Ctrl上触发而不是在Ctrl上触发S

这是代码！！

I want that when i press Ctrl + S then my check box is checked or unchecked
but when I just Press Ctrl key and before pressing S key KeyDown event is fired
i want that key down event should fired on Ctrl an S Not on Just Ctrl

Here is The Code!!

private void frlLOOKUP_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.Modifiers == Keys.ControlKey && e.KeyCode == Keys.S)
        {
            if (check_search.Checked)
            {
                check_search.Checked = false;
            }
            else
            {
               check_search.Checked = true;
            }
        }
    }

推荐答案

private void FormMain_KeyDown(object sender, KeyEventArgs e)
{
    if ((e.KeyCode == Keys.S) && (e.Modifiers == Keys.Control))
        checkBoxAck.Checked = !checkBoxAck.Checked;
}

确保将窗体的KeyPreview设置为true.

问候

Make sure that KeyPreview of the form is set to true.

Regards

有两个选项供您选择:

There are two options for you:

1. 将keyEventArgs属性Modifier与Key.Control(与您在示例中一样，不是 Keys.ControlKey)进行比较.
   
   

1. Compare the keyEventArgs property Modifier against Key.Control (not Keys.ControlKey as you did in your sample).
   
   

private void frlLOOKUP_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Modifiers == Keys.Control && e.KeyCode == Keys.S)
    {
        check_search.Checked = !check_search.Checked;
    }

}

如果您可以使用 ALT + S 作为快捷方式，则可以将CheckBox控件的Text属性设置为"Check& Search"之类的内容. br/>

If you can live with the short cut being ALT + S you can set the Text property of your CheckBox control to something like "Check&Search".

check_search.Text = "Check&Search";

这将允许您通过按 ALT + S 切换复选框.

This will allow you to toggle the CheckBox by pressing ALT + S.

问候，

曼弗雷德(Manfred)

Regards,

Manfred

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