如何不允许一键同时收到多个按键? [英] how not to allow multiple keystokes received at one key press?
问题描述
当我们按下某个键并持续按下该键时,会连续触发按键和击键事件. 有没有办法让这些仅在一个完整的周期后触发,例如,按下然后重新按下.
when we press a key and keep pressing it the keypress and keydown event continuously fires. Is there a way to let these fire only after a complete cycle ,eg keydown and then key up.
我希望用户不能连续按下键,而是希望用户必须先按然后释放键盘才能输入字符!
I would like the user not to be able press the key continuously rather would like the user have to press then release the key board to type a character !
这样当用户按下"p" 1秒钟时不会发生以下情况:pppppppppppppppppppppppppp.
so that following case do not occur eg : pppppppppppppppppppppppp when user presses 'p' for 1 sec.
推荐答案
声明一个布尔值isKeyDown
,在KeyDown
事件中,将该布尔值设置为true.在KeyUp
事件中,将布尔值设置为false.
Declare a boolean isKeyDown
, in theKeyDown
Event, set the boolean to true. In the KeyUp
event, set the boolean to false.
这是示例代码
bool isKeyDown=false;
public void control_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
if(isKeyDown)
return;
isKeyDown=true;
// do what you want to do
}
public void control1_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
{
isKeyDown=false;
// do you key up event, if any.
}
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