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My Timer is not reset when click on reset button C#

initialize the components
System.Timers.Timer t;
int h, m, s;
I want to reset the timer when I click on the reset button and turn it to 00.00.00, but when I try to reset it with the code the timer stops. But when I start the timer and stop it, it doesn't get reset to 00.00.00
Method of timer
private void OnTimeEvent(object sender, ElapsedEventArgs e)
{
Invoke(new Action(() =>
{
s += 1;
if (s == 60)
{
s = 0;
m += 1;
}
if (m == 60)
{
m = 0;
h += 1;
}
lbltime.Text = string.Format("{0}:{1}:{2}", h.ToString().PadLeft(2, '0'),
m.ToString().PadLeft(2, '0'), s.ToString().PadLeft(2, '0'));
}));
}
Form load event
t = new System.Timers.Timer();
t.Interval = 1000;
t.Elapsed += OnTimeEvent;
t.Start();
Reset Button Which is not working
t.Dispose();

Try something like this:
Stopwatch stopwatch = Stopwatch.StartNew();
private void OnTimeEvent(object sender, ElapsedEventArgs e)
{
Invoke(new Action(() => lbltime.Text = stopwatch.Elapsed.ToString("hh:mm:ss")));
}
private void OnResetButtonClick(object sender, EventArgs e)
{
stopwatch.Restart();
}
This uses a stopwatch to measure the time, and a timer to update the label from the stopwatch. This will also be much more accurate since timers do not guarantee any particular tick-frequency.

C# Reset a countdown timer-DispatcherTimer- in windows store app

I'm a C# newbie_and in programming in general_ and Ι'm trying to build a math quiz app with a countdown timer.
I generate an equation each time the user clicks the start button and I give him a max 60 seconds to answer. The user answers -whether his answer is wrong or right doesn't matter_ and can he/she can click again for a new equation. So I want the timer to reset each time the user is shown a new random equation. So far I've only managed to reset this when the 60sec timespan elapses but even that is not working properly, sometimes it displays 59 or 58 secs instead of 60.
So far reading other questions has't helped me much and the timer confuses me. I also accept suggestions to make my code simpler and more elegant.
Here is my code:
EquationView.xaml.cs
public sealed partial class EquationView : Page
{
DispatcherTimer timer = new DispatcherTimer();
int tick = 60;
int result;
public EquationView()
{
this.NavigationCacheMode = NavigationCacheMode.Enabled;
this.InitializeComponent();
}
private void startButton_Click(object sender, RoutedEventArgs e)
{
// Once clicked then disabled
startButton.IsEnabled = false;
// Enable buttons required for answering
resultTextBox.IsEnabled = true;
submitButton.IsEnabled = true;
var viewModel = App.equation.GenerateEquation();
this.DataContext = viewModel;
result = App.equation.GetResult(viewModel);
timer.Interval = new TimeSpan(0, 0, 0, 1);
//timer.Tick += new EventHandler(timer_Tick);
timer.Tick += timer_Tick;
timer.Start();
DateTime startTime = DateTime.Now;
// Reset message label
if (message.Text.Length > 0)
{
message.Text = "";
}
// Reset result text box
if (resultTextBox.Text.Length > 0)
{
resultTextBox.Text = "";
}
}
private void timer_Tick(object sender, object e)
{
Countdown.Text = tick + " second(s) ";
if (tick > 0)
tick--;
else
{
Countdown.Text = "Times Up";
timer.Stop();
submitButton.IsEnabled = false;
resultTextBox.IsEnabled = false;
startButton.IsEnabled = true;
tick = 60;
}
}
private void submitButton_Click(object sender, RoutedEventArgs e)
{
timer.Stop();
submitButton.IsEnabled = false;
resultTextBox.IsEnabled = false;
if (System.Text.RegularExpressions.Regex.IsMatch(resultTextBox.Text, "[^0-9]"))
{
MessageDialog msgDialog = new MessageDialog("Please enter only numbers.");
msgDialog.ShowAsync();
resultTextBox.Text.Remove(resultTextBox.Text.Length - 1);
//Reset buttons to answer again
submitButton.IsEnabled = true;
resultTextBox.IsEnabled = true;
timer.Start();
}
else
{
try
{
int userinput = Int32.Parse(resultTextBox.Text);
if (userinput == result)
{
message.Text = "Bingo!";
App.player.UpdateScore();
startButton.IsEnabled = true;
}
else
{
message.Text = "Wrong, sorry...";
startButton.IsEnabled = true;
}
}
catch (Exception ex)
{
MessageDialog msgDialog = new MessageDialog(ex.Message);
msgDialog.ShowAsync();
submitButton.IsEnabled = true;
resultTextBox.IsEnabled = true;
timer.Start();
}
}
}

It seems to me that you have at least two significant problems here. One is that your timer will likely give the user more than 60 seconds, due to the inaccuracy in the Windows thread scheduler (i.e. each tick will occur at slightly more than 1 second intervals). The other (and more relevant to your question) is that you don't reset the tick value to 60 except when the timer has elapsed.
For the latter issue, it would be better to simply reset your countdown value when you start the timer, rather than trying to remember everywhere that you stop it.
To fix that and the first issue, get rid of the tick field altogether and change your code to look more like this:
static readonly TimeSpan duration = TimeSpan.FromSeconds(60);
System.Diagnostics.Stopwatch sw;
private void startButton_Click(object sender, RoutedEventArgs e)
{
// Once clicked then disabled
startButton.IsEnabled = false;
// Enable buttons required for answering
resultTextBox.IsEnabled = true;
submitButton.IsEnabled = true;
var viewModel = App.equation.GenerateEquation();
this.DataContext = viewModel;
result = App.equation.GetResult(viewModel);
sw = System.Diagnostics.Stopwatch.StartNew();
timer.Interval = new TimeSpan(0, 0, 0, 1);
timer.Tick += timer_Tick;
timer.Start();
// Reset message label
if (message.Text.Length > 0)
{
message.Text = "";
}
// Reset result text box
if (resultTextBox.Text.Length > 0)
{
resultTextBox.Text = "";
}
}
private void timer_Tick(object sender, object e)
{
if (sw.Elapsed < duration)
{
Countdown.Text = (int)(duration - sw.Elapsed).TotalSeconds + " second(s) ";
}
else
{
Countdown.Text = "Times Up";
timer.Stop();
submitButton.IsEnabled = false;
resultTextBox.IsEnabled = false;
startButton.IsEnabled = true;
}
}
This way, it won't matter exactly when the tick event happens, the code will still correctly compute the actual time remaining and use that for the display and to tell whether the time is up.

Timer updating label

I know this is a common question but I can't seem to get it right. I have a form that goes out to gmail and processes some emails. I want to have a timer on the form to count how long the action has been running for. So once a user click the "start import" button I want the timer to start and once the "finished" messagebox appears it should stop. Here is what I have so far
Right now, the timer is just stays at the default text of "00";
namespace Import
{
public partial class Form1 : Form
{
Timer timer;
public Form1()
{
InitializeComponent();
}
private void btn_Import_Click(object sender, EventArgs e)
{
timer = new Timer();
timer.Interval = (1000);
timer.Enabled = true;
timer.Start();
timer.Tick += new EventHandler(timer_Tick);
// code to import emails
MessageBox.Show("The import was finished");
private void timer_Tick(object sender, EventArgs e)
{
if (sender == timer)
{
lblTimer.Text = GetTime();
}
}
public string GetTime()
{
string TimeInString = "";
int min = DateTime.Now.Minute;
int sec = DateTime.Now.Second;
TimeInString = ":" + ((min < 10) ? "0" + min.ToString() : min.ToString());
TimeInString += ":" + ((sec < 10) ? "0" + sec.ToString() : sec.ToString());
return TimeInString;
}
}
}
}

This is just one of many ways to do it. Of course, I would do it on background worker but this is legit way to get what you want:
Timer timer;
Stopwatch sw;
public Form1()
{
InitializeComponent();
}
private void btn_Import_Click(object sender, EventArgs e)
{
timer = new Timer();
timer.Interval = (1000);
timer.Tick += new EventHandler(timer_Tick);
sw = new Stopwatch();
timer.Start();
sw.Start();
// start processing emails
// when finished
timer.Stop();
sw.Stop();
lblTime.text = "Completed in " + sw.Elapsed.Seconds.ToString() + "seconds";
}
private void timer_Tick(object sender, EventArgs e)
{
lblTime.text = "Running for " + sw.Elapsed.Seconds.ToString() + "seconds";
Application.DoEvents();
}

Countdown Timer in a strip status label c#

My program has a parameter that starts up the winform and waits x number of seconds before it runs a function. Currently I am using Thread Sleep for x seconds and then the function runs. how can I add a timer in the strip status label?
so that it says: x Seconds Remaining...

Instead of blocking thread execution, simply call your method when required timeout passes. Place new Timer to your form, and set it's Interval to 1000. Then subscribe to timer's Tick event and calculate elapsed time in event handler:
private int secondsToWait = 42;
private DateTime startTime;
private void button_Click(object sender, EventArgs e)
{
timer.Start(); // start timer (you can do it on form load, if you need)
startTime = DateTime.Now; // and remember start time
}
private void timer_Tick(object sender, EventArgs e)
{
int elapsedSeconds = (int)(DateTime.Now - startTime).TotalSeconds;
int remainingSeconds = secondsToWait - elapsedSeconds;
if (remainingSeconds <= 0)
{
// run your function
timer.Stop();
}
toolStripStatusLabel.Text =
String.Format("{0} seconds remaining...", remainingSeconds);
}

You can use a Timer:
public class Form1 : Form {
public Form1(){
InitializeComponent();
t = new Timer {Interval = 1000};
t.Tick += Tick;
//try counting down the time
CountDown(100);
}
DateTime start;
Timer t;
long s;
public void CountDown(long seconds){
start = DateTime.Now;
s = seconds;
t.Start();
}
private void Tick(object sender, EventArgs e){
long remainingSeconds = s - (DateTime.Now - start).TotalSeconds;
if(remainingSeconds <= 0) {
t.Stop();
toolStripStatusLabel1.Text = "Done!";
return;
}
toolStripStatusLabel1.Text = string.Format("{0} seconds remaining...", remainingSeconds);
}
}

How do I set the contents of a label and have it reset to string.empty after a period of 5 seconds in c# winforms?

I've no real idea how to do this and I have tried messing with a timer but to no avail so far.
So what am I trying to do?
I have a label that is blank. When a certain event is triggered I want the label to say "Competition successfully setup" for a period of 5 seconds after which I want it to return to being blank.
Surely this can be done?? Can it? I have played around with a timer but I seem to be well off the mark.
Any help would be most welcome. My feeble attempt is below.
private void UpdateLabel(object sender, EventArgs e)
{
var timer = new Timer()
{
Interval = 5000,
};
timer.Tick += (s, evt) =>
lblCompetitionSetupSuccess.Text = "Competition successfully setup";
timer.Start();
lblCompetitionSetupSuccess.Text = string.Empty;
}

Try the other way around:
private void button1_Click(object sender, EventArgs e)
{
label1.Text = "I will vanish in 5 sec";
var timer = new Timer();
timer.Interval = 5000;
timer.Tick += (o, args) => label1.Text = "";
timer.Start();
}
First set the label to whatever text you want it to display for 5 sec
label1.Text = "I will vanish in 5 sec";
Then setup your timer so that on timer elapsed it will remove the text
var timer = new Timer();
timer.Interval = 5000;
timer.Tick += (o, args) => label1.Text = "";
timer.Start();
If you want the timer to stop after the first timer elapse:
timer.Tick += (o, args) =>
{
label1.Text = "";
timer.Enabled = false;
};

Make sure you're using the System.Windows.Forms.Timer class, which calls the tick event on the UI thread.