如何不允许一次按键收到多个按键? [英] how not to allow multiple keystokes received at one key press?

问题描述

当我们按下一个键并持续按下它时，keypress 和 keydown 事件会不断触发.有没有办法让这些只在一个完整的循环后触发，例如按键然后按键.

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键，而是希望用户必须按下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 !

这样就不会发生以下情况，例如:当用户按下 'p' 1 秒时，pppppppppppppppppppppppp.

so that following case do not occur eg : pppppppppppppppppppppppp when user presses 'p' for 1 sec.

推荐答案

声明一个boolean isKeyDown，在KeyDown事件中，设置boolean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. 
}

这篇关于如何不允许一次按键收到多个按键?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！