C# Winform 入门（12）之制作简单的倒计时

 倒计时效果展示

控件展示

以下均是使用label来形成的

label  的 BorderStyle：Fixed3D    ForeColor：Red    Blackground：Black

label 的属性 Name：

txtyear     txtmonth    txtday  txttime  txtweek

txtDays    txtHour    txtMintues   txtSeconds

 修改属性

 定义参数

  /// <summary>
  /// 定义时间参数
  /// 用户输入时间；当前时间
  /// 日，时，分，秒
  /// isClick用来判断点击事件
  /// </summary>
  DateTime dt, dtNow;
  int d, h, m, s;
  bool isClick=false;
  TimeSpan timespan;

Timer事件

最上层时间显示

 private void timer1_Tick(object sender, EventArgs e)
 {
     
     dtNow = DateTime.Now;
     this.txtyear.Text = dtNow.Year.ToString();
     this.txtmonth.Text = dtNow.Month.ToString();
     this.txtday.Text = dtNow.Day.ToString();
     this.txttime.Text = dtNow.ToLongTimeString();
     string week = "";
     switch (dtNow.DayOfWeek)
     {
         case DayOfWeek.Sunday:
             week = "日";
             break;
         case DayOfWeek.Monday:
             week = "一";
             break;
         case DayOfWeek.Tuesday:
             week = "二";
             break;
         case DayOfWeek.Wednesday:
             week = "三";
             break;
         case DayOfWeek.Thursday:
             week = "四";
             break;
         case DayOfWeek.Friday:
             week = "五";
             break;
         case DayOfWeek.Saturday:
             week = "六";
             break;
         default:
             break;
     }
     this.txtweek.Text = week;
 }

判断按钮是否点击，显示

  if (isClick==false)
  return;
  timespan = dt - dtNow;
  d = timespan.Days;
  h = timespan.Hours;
  m = timespan.Minutes;
  s = timespan.Seconds;
  txtDays.Text = d.ToString();
  txtHours.Text = h.ToString();
  txtMintues.Text = m.ToString();
  txtSeconds.Text = s.ToString();

按钮点击事件

private void button1_Click(object sender, EventArgs e)
{
    isClick = true;
    dt=Convert.ToDateTime(textBox1.Text);
}

代码

/// <summary>
/// 定义时间参数
/// 用户输入时间；当前时间
/// 日，时，分，秒
/// </summary>
DateTime dt, dtNow;
int d, h, m, s;
bool isClick=false;
TimeSpan timespan;
private void timer1_Tick(object sender, EventArgs e)
{
    
    dtNow = DateTime.Now;
    this.txtyear.Text = dtNow.Year.ToString();
    this.txtmonth.Text = dtNow.Month.ToString();
    this.txtday.Text = dtNow.Day.ToString();
    this.txttime.Text = dtNow.ToLongTimeString();
    string week = "";
    switch (dtNow.DayOfWeek)
    {
        case DayOfWeek.Sunday:
            week = "日";
            break;
        case DayOfWeek.Monday:
            week = "一";
            break;
        case DayOfWeek.Tuesday:
            week = "二";
            break;
        case DayOfWeek.Wednesday:
            week = "三";
            break;
        case DayOfWeek.Thursday:
            week = "四";
            break;
        case DayOfWeek.Friday:
            week = "五";
            break;
        case DayOfWeek.Saturday:
            week = "六";
            break;
        default:
            break;
    }
    this.txtweek.Text = week;

    if (isClick==false)
    return;
    timespan = dt - dtNow;
    d = timespan.Days;
    h = timespan.Hours;
    m = timespan.Minutes;
    s = timespan.Seconds;
    txtDays.Text = d.ToString();
    txtHours.Text = h.ToString();
    txtMintues.Text = m.ToString();
    txtSeconds.Text = s.ToString();
}
private void button1_Click(object sender, EventArgs e)
{
    isClick = true;
    dt=Convert.ToDateTime(textBox1.Text);
}