【C#】C#winform 双击/按"F12"键全屏，按"Esc"键退出

private void Lottery_DBClick(object sender, EventArgs e)

{

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;// 设置边框为 None

this.WindowState = FormWindowState.Maximized;// 最大化

this.TopMost = true;// 置顶

this.KeyPreview = true;// 允许窗体先收到键盘事件

this.KeyUp += new KeyEventHandler(Lottery_KeyUp);// 允许窗体先收到键盘事件

this.Show();//显示 Form

}

private void Lottery_KeyUp(object sender, KeyEventArgs e)

{

if (e.KeyCode == Keys.Escape)//"Esc"按键退出全屏

{

this.WindowState = FormWindowState.Normal;

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Sizable;

}

if (e.KeyCode == Keys.F12)

{

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;// 设置边框为 None

this.WindowState = FormWindowState.Maximized;// 最大化

this.TopMost = true;// 置顶

this.KeyPreview = true;// 允许窗体先收到键盘事件

this.KeyUp += new KeyEventHandler(Lottery_KeyUp);// 允许窗体先收到键盘事件

this.Show();//显示 Form

}

}