tk域名网站装饰公司网站建设效果

 由于比较喜欢英语，这里就把汉字属性名都改成英语了

 

声明变量，生成随机数

 int key = 0;Random random = new Random();

 窗体加载

private void Form1_Load(object sender, EventArgs e)
{timer1.Enabled=false;
}

 开始按钮

 private void txt_begin_Click(object sender, EventArgs e){timer1.Enabled = true;}

 结束按钮

private void btn_end_Click(object sender, EventArgs e)
{timer1.Enabled = false;
}

 Timer事件

 private void timer1_Tick(object sender, EventArgs e){key=random.Next(13);//0-12if (key == 12) {textBox1.Text = "Special prize !";}else if (key > 9){textBox1.Text="First prize !";}else if (key > 5){textBox1.Text="Second prize !";}else{textBox1.Text="Thank you for participating !";}}