how to use timer which alert on every 2 minute on a button

Ajay Kadian

I am label which display the current time ( label8.Text = DateTime.Now.ToString("HH:mm:ss"); ) but here i want on a button click the timer would alert on two minute (i.e time out)..

5 Replies

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Vulpes12y ago
Accepted answer
Sorry, I've forgotten to escape the colon. It should be:

label8.Text = ts.ToString("mm\\:ss");

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Ajay Kadian12y ago
Its shows error

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Vulpes12y ago
I wouldn't use a lambda expression for this as we may need to alter the 'captured' variable, startTime.

The following is off the top of my head and therefore untested:

private Timer timer;
private DateTime startTime;

private Form1_Load(object sender, EventArgs e)
{
timer = new Timer{Interval = 1000, Enabled = false};
timer.Tick += timer_Tick;
}

private button1_Click(object sender, EventArgs e)
{
startTime = DateTime.Now;
if(!timer.Enabled) timer.Enabled = true;
}

private private void timer_Tick(object sender, EventArgs e)
{
TimeSpan ts = (TimeSpan.FromMinutes(2) - (DateTime.Now - startTime);
if(ts.TotalSeconds >= 0)
{
label8.Text = ts.ToString("mm:ss");
}
else
{
label8.Text = "00:00";
timer.Enabled = false;
Console.Beep();
}
}
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Ajay Kadian12y ago
I write this code but after 2 minute i want to stop the timer and in between 2 minutes if i again click the same button it start from starting ...

var startTime = DateTime.Now;

var timer = new Timer() { Interval = 1000 };

timer.Tick += (obj, args) =>
label8.Text =
(TimeSpan.FromMinutes(2) - (DateTime.Now - startTime))
.ToString("hh\\:mm\\:ss");
Console.Beep();
timer.Enabled = true;
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Vulpes12y ago
Not sure exactly what you mean by an alert but you could update the time display and/or sound a beep in two minutes time by adding a timer to your form and setting its interval property to:

2 * 60 * 1000 = 120000 milliseconds

The code to be added to the Tick eventhandler would be:

private void timer1_Tick(object sender, EventArgs e)
{
label8.Text = DateTime.Now.ToString("HH:mm:ss");
timer1.Enabled = false; // if only one alert needed
Console.Beep();
}

If you're wanting to do a timeout, perhaps a countdown would be more suitable?

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