倒数计时器中的重置按钮

Question

I have a button, which I press and it starts a countdown. But, if I press the same button again, the timer must reset and do another countdown (with another time defined by my program, but now this is irrelevant).

Is there any way I can do this reset inside the same button_click? Maybe checking if the button was clicked again so I can reset the timer values?

I have this timer tick

private int milliSecondsLeft = 0;
private int t = 0;
private bool timeSet = false;
private void timer2_Tick(object sender, EventArgs e)
{
    string timeOp = dataGridView1.Rows[t].Cells[5].Value + "";
    t++;
    DateTime timeConvert;
    DateTime dateTime = DateTime.Now;

    if (!timeSet) 
    {
        DateTime.TryParse(timeOp, out timeConvert);
        milliSecondsLeft = (int)timeConvert.TimeOfDay.TotalMilliseconds;
        timeSet = true;
        timeSetNxt = false;
    }

    milliSecondsLeft = milliSecondsLeft - 1000;

    if (milliSecondsLeft > 0)
    {
        var span = new TimeSpan(0, 0, 0, 0, milliSecondsLeft);
        lblLeft.Text = span.ToString(@"hh\:mm\:ss");
    }
    else
    {
        timer2.Stop();
    }
}

and this button_click

each time I press my button it goes t++; , then it reads another time value on my datagrid. thats why it must reset

int t = 1;
private void btn2_Click(object sender, EventArgs e)
{
    timer2.Start();
    lblLeft.Text = dataGridView1.Rows[t].Cells[5].Value.ToString();
    string value = dataGridView1.Rows[t].Cells[5].Value.ToString(); 
    lblLeft.Text = value.ToString();
    t++;
}

Answer 1

You could use the Tag property of the Button to set a flag for that logic you want to create. on the button click event

if (btnExample.Tag==0)
{
   btnExample.Tag=1;
   //call startCountDown function
}
else
{ 
   btnExample.Tag=0;
   // call reset
}

Answer 2

Show your Timer Code. To get the Number of resets. Use code below.

  int button_clicked = new int(); 

  private void button1_Click(object sender, EventArgs e)
  {
      // How many times you have Reset
      button_clicked++;
      // Your Timer Code
  }

Just start a new Timer with Every click. Also, dispose the last one. You can use button_clicked to know if a timer has been started and hence dispose if the button_clicked > 0

Answer 3

I would check if the timer is enabled

if (!timer2.Enabled) StartTimer2();
else ResetTimer2();