C# Winform 入门（7）之简单的抽奖系统邮件

 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);//0-12
     if (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 !";
     }
 }