[C#]006_My006App_电子表

先添加一个时钟控件, Enable属性设置为Trun; Interval属性设置为1000

Code:

private void timer1_Tick(object sender, EventArgs e) //时钟控件
{
    string timNewTime = "";
    string timNewHour = Convert.ToString(DateTime.Now.Hour);
    //定义“时”的值
    if (Convert.ToInt32(timNewHour)<10) //值小于10的时候,在前面加0
    {
        timNewHour = "0" + timNewHour;
    }

    string timNewMinute = Convert.ToString(DateTime.Now.Minute);
    if (Convert.ToInt32(timNewMinute) < 10) //值小于10的时候,在前面加0
    {
        timNewMinute = "0" + timNewMinute;
    }

    string timNewSecond = Convert.ToString(DateTime.Now.Second);
    if (Convert.ToInt32(timNewSecond) < 10) //值小于10的时候,在前面加0
    {
        timNewSecond = "0" + timNewSecond;
    }
    timNewTime = timNewHour + ":" + timNewMinute + ":" + timNewSecond;
    label1.Text = timNewTime;  //显示时间
}

显示效果如下: