如何在c＃Error'System Windows Forms KeyEventArgs'

Question

如何在c＃Error'System Windows Forms KeyEventArgs'

中创建keydown事件

错误：

  

'System.Windows.Forms.KeyEventArgs'不包含带0参数的构造函数？如何创建keydown事件   EXP＆gt;＆gt;＆gt; [！[在此输入图像说明] [1]] [1]

public event KeyEventHandler TextBoxKeyDow;

protected void OnTextBoxKeyDow()
{
    if (TextBoxKeyDow != null)
    {
        TextBoxKeyDow(this,new KeyEventArgs());
    }
} 

Answer 1

public event EventHandler BBBClick;
    protected void OnBBBClick()
    {
        if (BBBClick != null)
        {
            BBBClick(this, new EventArgs());
        }
    }   
    private void button1_Click_1(object sender, EventArgs e)
    {
        OnBBBClick();
    }

在用户控件中创建keydown事件 EXP＆GT;＆GT;＆GT;