Develop Reference

How I can stop a timer with seconds in real time c#?

I'm trying to stop a timer when 16 seconds in real time have passed, but i don't know how i can do that.
I made this little example: when picturebox1 intersects with picturebox2,this action activate a timer, and this timer have to shows the picturebox3 during 16 seconds in real time and after stop it(timer) (and the picturebox3 doesn't show).
(Sorry for my english. But StackOverflow in Spanish doesn't have many information).
I'm using windows form and C#
private void timer2_Tick(object sender, EventArgs e)
{
pictureBox7.Hide();
if ((pictureBox3.Bounds.IntersectsWith(pictureBox2.Bounds) && pictureBox2.Visible) || (pictureBox5.Bounds.IntersectsWith(pictureBox2.Bounds) && pictureBox2.Visible))
{
puntaje++;
this.Text = "Puntaje: " + puntaje;
if (puntaje % 5 == 0)
{
timer3.Enabled=true;
//This is the part where i want set down the timer3, timer 2 is on
}
}

You can try this, on your timer tick event handler. Timespan counts the elapsed time between two dates. On this case since its 16 seconds, we count it by negative.
private void timer1_Tick(object sender, EventArgs e)
{
TimeSpan ts = dtStart.Subtract(DateTime.Now);
if (ts.TotalSeconds <= -16)
{
timer1.Stop();
}
}
Make sure your dtStart (DateTime) is declared when you start your timer:
timer1.Start();
dtStart = DateTime.Now;

The cleanest way I can see this implemented is by using the interval parameter of a System.Timers.Timer.
Here's a sample snippet of the code
var timer = new Timer(TimeSpan.FromSeconds(16).TotalMilliseconds) { AutoReset = false };
timer.Elapsed += (sender, e) =>
{
Console.WriteLine($"Finished at exactly {timer.Interval} milliseconds");
};
_timer.Start();
The TimeSpan.FromSeconds(16).TotalMilliseconds basically converts to 16000 but I used the TimeSpan static method for you to understand it easier and looks more readable.
The AutoReset property of the timer tells it that it should only be triggered once.
Adjusted for your code
private void timer2_Tick(object sender, EventArgs e)
{
pictureBox7.Hide();
if ((pictureBox3.Bounds.IntersectsWith(pictureBox2.Bounds) && pictureBox2.Visible)
|| (pictureBox5.Bounds.IntersectsWith(pictureBox2.Bounds) && pictureBox2.Visible))
{
puntaje++;
this.Text = "Puntaje: " + puntaje;
if (puntaje % 5 == 0)
{
var timer3 = new Timer(TimeSpan.FromSeconds(16).TotalMilliseconds) { AutoReset = false };
timer3.Elapsed += (sender, e) =>
{
pictureBox3.Visible = true;
};
timer3.Start();
}
}
}
Please do mark the question Answered if this solves your issue.

How to set timer to execute at specific time in c#

I have a requirement where i need to execute timer at 00:01:00 A.M every day...But i am not getting how to achieve this ..If i am taking Systems time,it can be in different format..
Here is my timer code..
static System.Timers.Timer timer;
timer = new System.Timers.Timer();
timer.Interval = 1000 * 60 * 60 * 24;//set interval of one day
timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
start_timer();
static void timer_Elapsed(object sender, ElapsedEventArgs e)
{
// Add timer code here
}
private static void start_timer()
{
timer.Start();
}

If you want to start a timer at exactly 00:01:00am do some processing time and then restart the timer you just need to calculate the difference between Now and the next 00:01:00am time slot such as.
static Timer timer;
static void Main(string[] args)
{
setup_Timer();
}
static void setup_Timer()
{
DateTime nowTime = DateTime.Now;
DateTime oneAmTime = new DateTime(nowTime.Year, nowTime.Month, nowTime.Day, 0, 1, 0, 0);
if (nowTime > oneAmTime)
oneAmTime = oneAmTime.AddDays(1);
double tickTime = (oneAmTime - nowTime).TotalMilliseconds;
timer = new Timer(tickTime);
timer.Elapsed += timer_Elapsed;
timer.Start();
}
static void timer_Elapsed(object sender, ElapsedEventArgs e)
{
timer.Stop();
//process code..
setup_Timer();
}

What you should do is write your program that does whatever you need it to do, and then use your OS's built-in task scheduler to fire it off. That'd be the most reliable. Windows's Task Scheduler, for instance, can start your app before the user logs in, handle restarting the app if necessary, log errors and send notifications, etc.
Otherwise, you'll have to run your app 24/7, and have it poll for the time at regular intervals.
For instance, you could change the interval every minute:
timer.Interval = 1000 * 60;
And inside your Elapsed event, check the current time:
static void timer_Elapsed(object sender, ElapsedEventArgs e)
{
if (DateTime.Now.Hour == 1 && DateTime.Now.Minute == 0)
{
// do whatever
}
}
But this is really unreliable. Your app may crash. And dealing with DateTime's can be tricky.

You could always calculate it:
static void timer_Elapsed(object sender, ElapsedEventArgs e)
{
// Do stuff
start_timer();
}
private static void start_timer()
{
timer.Interval = CalculateInterval();
timer.Start();
}
private static double CalculateInterval()
{
// 1 AM the next day
return (DateTime.Now.AddDays(1).Date.AddHours(1) - DateTime.Now).TotalMilliseconds;
}

Here is a timer implementation which takes an Interval (just like any other timer) and fires exactly when that interval expires, even the machine goes to sleep mode in between.
public delegate void TimerCallbackDelegate(object sender, ElapsedEventArgs e);
public class TimerAbsolute : System.Timers.Timer
{
private DateTime m_dueTime;
private TimerCallbackDelegate callback;
public TimerAbsolute(TimerCallbackDelegate cb) : base()
{
if (cb == null)
{
throw new Exception("Call back is NULL");
}
callback = cb;
this.Elapsed += this.ElapsedAction;
this.AutoReset = true;
}
protected new void Dispose()
{
this.Elapsed -= this.ElapsedAction;
base.Dispose();
}
public double TimeLeft
{
get
{
return (this.m_dueTime - DateTime.Now).TotalMilliseconds;
}
}
public int TimeLeftSeconds
{
get
{
return (int)(this.m_dueTime - DateTime.Now).TotalSeconds;
}
}
public void Start(double interval)
{
if (interval < 10)
{
throw new Exception($"Interval ({interval}) is too small");
}
DateTime dueTime = DateTime.Now.AddMilliseconds(interval);
if (dueTime <= DateTime.Now)
{
throw new Exception($"Due time ({dueTime}) should be in future. Interval ({interval})");
}
this.m_dueTime = dueTime;
// Timer tick is 1 second
this.Interval = 1 * 1000;
base.Start();
}
private void ElapsedAction(object sender, System.Timers.ElapsedEventArgs e)
{
if (DateTime.Now >= m_dueTime)
{
// This means Timer expired
callback(sender, e);
base.Stop();
}
}
}

How to display seconds using TimeSpan on Timer Tick Event

I am using below code to display time left in hh:mm:ss format for example if duration is 30min, it will show like this 00:30:00 and after 1 min it will show 00:29:00, how can i also display the remaining seconds and decrease them accordingly.,
Edit
I tried timer1.Interval = 1000; and
examTime = examTime.Subtract(TimeSpan.FromSeconds(1));
But its not showing me seconds reducing each second, How do i do it ?
public SubjectExamStart()
{
InitializeComponent();
examTime = TimeSpan.FromMinutes(double.Parse(conf[1]));
label1.Text = examTime.ToString();
timer1.Interval = 60 * 1000;
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
if (sender == timer1)
{
if (examTime.TotalMinutes > 0)
{
examTime = examTime.Subtract(TimeSpan.FromMinutes(1));
label1.Text = examTime.ToString();
}
else
{
timer1.Stop();
MessageBox.Show("Exam Time is Finished");
}
}
}

Instead of Subtracting TimeSpan.FromMinutes you need to subtract from TimeSpan.FromSeconds
public SubjectExamStart()
{
InitializeComponent();
examTime = TimeSpan.FromSeconds(double.Parse(conf[1]));
label1.Text = examTime.ToString();
timer1.Interval = 1000;
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
if (sender == timer1)
{
if (examTime.TotalMinutes > 0)
{
examTime = examTime.Subtract(TimeSpan.FromSeconds(1));
label1.Text = examTime.ToString();
}
else
{
timer1.Stop();
MessageBox.Show("Exam Time is Finished");
}
}
}
If you want to format the Time Span value while assigning to Label... You can use below..
label1.Text = examTime.ToString(#"dd\.hh\:mm\:ss");

To do this properly, you will need to keep a track of when the timer was started
DateTime examStartTime;
System.Windows.Forms.Timer runTimer;
TimeSpan totalExamTime = new TimeSpan(1, 30, 0); // Set exam time to 1 hour 30 minutes.
if (runTimer == null)
runTimer = new System.Windows.Forms.Timer();
runTimer.Interval = 200;
runTimer.Tick -= new EventHandler(runTimerTick);
runTimer.Tick += new EventHandler(runTimerTick);
examStartTime = DateTime.Now;
runTimer.Start();
Then in the event handler you can do:
public void runTimerTick(object sender, EventArgs e)
{
TimeSpan currentExamTime = DateTime.Now - examStartTime;
if (currentExamTime > totalExamTime)
{
MessageBox.Show("Exam Time is Finished");
runTimer.Stop();
runTimer.Tick -= new EventHandler(runTimerTick);
runTimer.Dispose();
}
}
I hope this helps.

try this hope this will work for u
set timer interval=1000
minremain=1200000; //Should be in milisecond
timerplurg.satrt();
private void timerplurg_Tick(object sender, EventArgs e)
{
minremain = minremain - 1000; //substring One second from total time
string Sec = string.Empty;
if (minremain <= 0)
{
lblpurgingTimer.Text = "";
timerplurg.Stop();
return;
}
else
{
var timeSpan = TimeSpan.FromMilliseconds(Convert.ToDouble(minremain));
var seconds = timeSpan.Seconds;
if (seconds.ToString().Length.Equals(1))
{
Sec = "0" + seconds.ToString();
}
else
{
Sec = seconds.ToString();
}
string Totaltime = "Remaing Second: " + Sec;
lblpurgingTimer.Text = Totaltime;
}

C# timer stop after some number of ticks automatically

How to stop a timer after some numbers of ticks or after, let's say, 3-4 seconds?
So I start a timer and I want after 10 ticks or after 2-3 seconds to stop automatically.
Thanks!

You can keep a counter like
int counter = 0;
then in every tick you increment it. After your limit you can stop timer then. Do this in your tick event
counter++;
if(counter ==10) //or whatever your limit is
yourtimer.Stop();

When the timer's specified interval is reached (after 3 seconds), timer1_Tick() event handler will be called and you could stop the timer within the event handler.
Timer timer1 = new Timer();
timer1.Interval = 3000;
timer1.Enabled = true;
timer1.Tick += new System.EventHandler(timer1_Tick);
void timer1_Tick(object sender, EventArgs e)
{
timer1.Stop(); // or timer1.Enabled = false;
}

i generally talking because you didn't mention which timer, but they all have ticks... so:
you'll need a counter in the class like
int count;
which you'll initialize in the start of your timer, and you'll need a dateTime like
DateTime start;
which you'll initialize in the start of your timer:
start = DateTime.Now;
and in your tick method you'll do:
if(count++ == 10 || (DateTime.Now - start).TotalSeconds > 2)
timer.stop()
here is a full example
public partial class meClass : Form
{
private System.Windows.Forms.Timer t;
private int count;
private DateTime start;
public meClass()
{
t = new Timer();
t.Interval = 50;
t.Tick += new EventHandler(t_Tick);
count = 0;
start = DateTime.Now;
t.Start();
}
void t_Tick(object sender, EventArgs e)
{
if (count++ >= 10 || (DateTime.Now - start).TotalSeconds > 10)
{
t.Stop();
}
// do your stuff
}
}

Assuming you are using the System.Windows.Forms.Tick. You can keep track of a counter, and the time it lives like so. Its a nice way to use the Tag property of a timer.
This makes it reusable for other timers and keeps your code generic, instead of using a globally defined int counter for each timer.
this code is quiet generic as you can assign this event handler to manage the time it lives, and another event handler to handle the specific actions the timer was created for.
System.Windows.Forms.Timer ExampleTimer = new System.Windows.Forms.Timer();
ExampleTimer.Tag = new CustomTimerStruct
{
Counter = 0,
StartDateTime = DateTime.Now,
MaximumSecondsToLive = 10,
MaximumTicksToLive = 4
};
//Note the order of assigning the handlers. As this is the order they are executed.
ExampleTimer.Tick += Generic_Tick;
ExampleTimer.Tick += Work_Tick;
ExampleTimer.Interval = 1;
ExampleTimer.Start();
public struct CustomTimerStruct
{
public uint Counter;
public DateTime StartDateTime;
public uint MaximumSecondsToLive;
public uint MaximumTicksToLive;
}
void Generic_Tick(object sender, EventArgs e)
{
System.Windows.Forms.Timer thisTimer = sender as System.Windows.Forms.Timer;
CustomTimerStruct TimerInfo = (CustomTimerStruct)thisTimer.Tag;
TimerInfo.Counter++;
//Stop the timer based on its number of ticks
if (TimerInfo.Counter > TimerInfo.MaximumTicksToLive) thisTimer.Stop();
//Stops the timer based on the time its alive
if (DateTime.Now.Subtract(TimerInfo.StartDateTime).TotalSeconds > TimerInfo.MaximumSecondsToLive) thisTimer.Stop();
}
void Work_Tick(object sender, EventArgs e)
{
//Do work specifically for this timer
}

When initializing your timer set a tag value to 0 (zero).
tmrAutoStop.Tag = 0;
Then, with every tick add one...
tmrAutoStop.Tag = int.Parse(tmrAutoStop.Tag.ToString()) + 1;
and check if it reached your desired number:
if (int.Parse(tmrAutoStop.Tag.ToString()) >= 10)
{
//do timer cleanup
}
Use this same technique to alternate the timer associated event:
if (int.Parse(tmrAutoStop.Tag.ToString()) % 2 == 0)
{
//do something...
}
else
{
//do something else...
}
To check elapsed time (in seconds):
int m = int.Parse(tmrAutoStop.Tag.ToString()) * (1000 / tmrAutoStop.Interval);

Display a timer that loops every 15 seconds

I made this code, but there is a delay between the time loop showing on the screen and the exact elapsed time.
Timer t = new Timer();
int time = 15;
string timestr;
t.Interval = 1000;
t.Tick += new EventHandler(Time);
void Time(object sender, EventArgs e)
{
if (time == 0)
{ time = 15; }
if (time != 0)
{
time--;
timestr = time.ToString();
label.Text = timestr;
}
}

My guess is that you are off by one second since the timer won't fire its first event until that interval value is reached.
A quick fix would be to fire the event yourself when you start it:
t.Start();
Time(t, EventArgs.Empty);

I think you need to try this. Add the line Application.DoEvents() just before the end of Time function.
void Time(object sender, EventArgs e)
{
if (time == 0)
{ time = 15; }
if (time != 0)
{
time--;
timestr = time.ToString();
label.Text = timestr;
}
Application.DoEvents();
}