Displaying remaining time in a label and progress bar

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I have a function that starts at 8am and ends at 8:45 am. That function displays the remaining time when we are in that time period. How could I display the progress in the progress bar?

Here is what I have so far:

private void timerPeriods_Tick(object sender, EventArgs e)
  {

      DateTime date_time_now = DateTime.Now;

      //Period 1 8:00 - 8:45AM
      DateTime date_time_Period1End = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 08, 45, 0);
      //Remaining time to end of period 1
      TimeSpan time_span = date_time_Period1End - date_time_now;

      //conditions
      if (date_time_Period1End > date_time_now)
      {
         //Progress bar ?

          string time = string.Format("{0:00}:{1:00}:{2:00}", time_span.Hours, time_span.Minutes, time_span.Seconds);

          lblP1CountDown.Text = "Left: "  + time;


      }
      else
      {
          lblP1CountDown.Text = "Done";

      }

Posted 22-Apr-14 8:36am

fatihkaratay

Updated 22-Apr-14 8:58am

v7

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Emre Ataseven · Accepted Answer · 2014-04-22T09:47:00

Assuming that your timer is System.Windows.Forms.Timer ;

C#

var timerPeriods = new Timer();
timerPeriods.Interval = 1000;
timerPeriods.Tick += timerPeriods_Tick;
timerPeriods.Start();
progressBar1.Maximum = 2700; // for 45 min

C#

void timerPeriods_Tick(object sender, EventArgs e)
{
    var curTime = DateTime.Now.TimeOfDay;
    var refTime1 = new TimeSpan(8, 0, 0);
    var refTime2 = new TimeSpan(8, 45, 0);


    if (curTime >= refTime1 && curTime <= refTime2)
    {
        var tsleft = refTime2.Subtract(curTime);
        lblP1CountDown.Text = tsleft.ToString(@"hh\:mm\:ss");
        progressBar1.Value++;

    }
    else
    {
        lblP1CountDown.Text = "Done";
        (sender as Timer).Stop();
    }
}

More generic way, if you start timer between time period not before refTime1 ;

C#

var timerPeriods = new Timer();
timerPeriods.Interval = 1000;
timerPeriods.Tick += timerPeriods_Tick;
timerPeriods.Start();
progressBar1.Maximum = 100;

C#

void timerPeriods_Tick(object sender, EventArgs e)
{
    var curTime = DateTime.Now.TimeOfDay;
    var refTime1 = new TimeSpan(8, 0, 0);
    var refTime2 = new TimeSpan(8, 45, 0);


    if (curTime >= refTime1 && curTime <= refTime2)
    {
        var tsleft = refTime2.Subtract(curTime);
        lblP1CountDown.Text = tsleft.ToString(@"hh\:mm\:ss");
        progressBar1.Value = 100 - (int)( tsleft.TotalSeconds * 100 /refTime2.Subtract(refTime1).TotalSeconds);
    }
    else
    {
        lblP1CountDown.Text = "Done";
        (sender as Timer).Stop();
    }
}