public static void ClearCountByTime()
{
System.Timers.Timer aTimer = new System.Timers.Timer();
aTimer.Elapsed += new ElapsedEventHandler(TimeEvent);
// 设置引发时间的时间间隔 此处设置为１秒
aTimer.Interval = 1000;
aTimer.Enabled = true;
}

private static void TimeEvent(object source, ElapsedEventArgs e)
{
// 得到 hour minute second 如果等于某个值就开始执行
int intHour = e.SignalTime.Hour;
int intMinute = e.SignalTime.Minute;
int intSecond = e.SignalTime.Second;
// 定制时间,在00：00：00 的时候执行
int iHour = 00;
int iMinute = 00;
int iSecond = 00;

// 设置 每天的00：00：00开始执行程序
if (intHour == iHour && intMinute == iMinute && intSecond == iSecond)
{
ClearCount();
}
}

public static void ClearCount()
{
string sql = "要执行的存储过程";
int result=SqlHelper.ExecuteNonQuery(CommandType.StoredProcedure, sql);
if (result > 0)
{
//TodayCount清零成功！;
}
else
{
//TodayCount清零失败！;
}
}