C# - Countdown Timer Using NumericUpDown as Interval - c#

I'm sure this has been asked before, but I cannot seem to find a solution that works. I have a NumericUpDown on my form and a label along with a timer and a button. I want the timer to start when the button is pressed and the interval for the timer to equal that of the NumericUpDown and a countdown will be displayed in the label. I know this should be easy. Any help?
So far:
int tik = Convert.ToInt32(TimerInterval.Value);
if (tik >= 0)
{
TimerCount.Text = (tik--).ToString();
}
else
{
TimerCount.Text = "Out of Time";
}
It doesn't seem to update as the timer ticks.

Here is a quick example to what you are looking for. This should give you a basic idea on what you need to do
//class variable
private int totNumOfSec;
//set the event for the tick
//and the interval each second
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Interval = 1000;
private void button1_Click(object sender, EventArgs e)
{
totNumOfSec = (int)this.numericUpDown1.Value;
timer1.Start();
}
void timer1_Tick(object sender, EventArgs e)
{
//check the timer tick
totNumOfSec--;
if (totNumOfSec == 0)
{
//do capture
MessageBox.Show("Captured");
timer1.Stop();
}
else
label1.Text = "Caputring in " + totNumOfSec.ToString();
}

Related

c# windows form timer doesn't update properly

I'm pretty new to C# and wanted to add a countdown timer to the program I'm making. The timer doesn't update after the first change unless I add i--; but then it starts off taking away 2 seconds instead of 1 but it works after that. I'm not sure what's going on here.
public int i = 100;
private void Timer1_Tick(object sender, EventArgs e)
{
if (i < 1)
{
timer1.Stop();
StopWatch.Text = "00:00:00";
}
else
{
i--; //doesn't work without this line
TimeSpan time = TimeSpan.FromSeconds(i);
time = time.Subtract(TimeSpan.FromSeconds(1));
StopWatch.Text = time.ToString(#"hh\:mm\:ss");
}
}
private void Button1_Click(object sender, EventArgs e)
{
timer1.Interval = 1000;
timer1.Tick += new EventHandler(Timer1_Tick);
timer1.Start();
}
When Timer1_Tick first ticks i is 0 and therefore if (i < 1) statement is true
which leads to timer1.Stop();

c# timer is going too fast if set

i'm trying to implement a simple countdown using Timer (using https://www.geoffstratton.com/cnet-countdown-timer code). it does work if i run the timer once but if i stop the timer or the timer goes to 00:00 the next time i'll start it, it will go 2x faster. if i stop it and start it again it will go 3x faster.
(my explaination may be not clear, i did a gif that demonstrate the problem)
https://media.giphy.com/media/fQr7sX6LNRECvQpCYP/giphy.gif
i'm very novice at c#, i usually figure things out but i cant get what's happening here.
I included the timer code. if somebody can help me with this it would be awesome!
Thanks !!!
private void btnStartTimer_Click(object sender, EventArgs e)
{
if (txtTimer.Text == "00:00")
{
MessageBox.Show("Please enter the time to start!", "Enter the Time", MessageBoxButtons.OK);
}
else
{
string[] totalSeconds = txtTimer.Text.Split(':');
int minutes = Convert.ToInt32(totalSeconds[0]);
int seconds = Convert.ToInt32(totalSeconds[1]);
timeLeft = (minutes * 60) + seconds;
btnStartTimer.Enabled = false;
btnCleartimer.Enabled = false;
txtTimer.ReadOnly = true;
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Start();
}
}
private void btnStopTimer_Click(object sender, EventArgs e)
{
timer1.Stop();
timeLeft = 0;
btnStartTimer.Enabled = true;
btnCleartimer.Enabled = true;
txtTimer.ReadOnly = false;
}
private void btnCleartimer_Click(object sender, EventArgs e)
{
txtTimer.Text = "00:00";
}
private void timer1_Tick(object sender, EventArgs e)
{
if (timeLeft > 0)
{
timeLeft = timeLeft - 1;
// Display time remaining as mm:ss
var timespan = TimeSpan.FromSeconds(timeLeft);
txtTimer.Text = timespan.ToString(#"mm\:ss");
// Alternate method
//int secondsLeft = timeLeft % 60;
//int minutesLeft = timeLeft / 60;
}
else
{
timer1.Stop();
SystemSounds.Exclamation.Play();
MessageBox.Show("Time's up!", "Time has elapsed", MessageBoxButtons.OK);
}
}
You need to unsubscribe from the event in your btnStopTimer_Click method:
timer1.Tick -= timer1_Tick;
You are adding the event to Count every time you start the timer. As a result, the first time you call it there is only one event, the second time two events and so on. As a result, you first go down one second, then two,....
I would recommend creating the timer separately and just call Start and Stop.
Alternativ, user Dmitry Korolev answered a good Approach if you don't want to create the timer somewhere else
timer1.Tick -= timer1_Tick;

Mouse Click Event in Timer in c#

I'm having trouble with mouse click event in a timer in c#.
My timer's interval is 100 and set on True, i want to make action each 100 ticks and indentify the type of click in. I want to play the action each 100 ticks when a mouse is pressed, but this only plays one time.
EDIT: I don't want to have to enable/disable the time.
private void timer1_Tick(object sender, MouseEventArgs e)
{
if (MouseButtons == MouseButtons.Left)
{
//Action...
}
if (MouseButtons == MouseButtons.Right)
{
//Action...
}
}
100 ticks is 0.01 milliseconds and Interval is an integer so I used seconds for this test.
This webform will detect the last clicked mouse button and change the timer interval in the timer tick event based on the mouse button that was last clicked. I also added a label for visual indication:
public partial class Form1 : Form
{
Timer t;
MouseButtons lastMouseButtonClicked;
Label lblStatus;
public Form1()
{
InitializeComponent();
lblStatus = new Label()
{
Text = "No click since tick."
,Width = 500
};
this.Controls.Add(lblStatus);
t = new Timer();
//A single tick represents one hundred nanoseconds or one ten-millionth of a second. There are 10,000 ticks in a millisecond, or 10 million ticks in a second.
//t.Interval = (int)(100 / TimeSpan.TicksPerMillisecond);//0.01 ms
t.Interval = 1000;
t.Tick += T_Tick;
t.Enabled = true;
this.MouseClick += Form1_MouseClick;
}
private void T_Tick(object sender, EventArgs e)
{
switch (lastMouseButtonClicked)
{
case MouseButtons.Left:
//Action...
lblStatus.Text = "MouseButtons.Left";
t.Interval = 1000;
break;
case MouseButtons.Right:
//Action...
lblStatus.Text = "MouseButtons.Right";
t.Interval = 3000;
break;
default:
lblStatus.Text = "No click since tick.";
break;
}
LastMouseButtonClicked = MouseButtons.None;
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
lastMouseButtonClicked = e.Button;
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
The timer interval is changed to either 1s or 3s depending on the mouse click. You could also change the interval in the mouse click event to simplify it.
Here is an example:
public partial class Form1 : Form
{
Timer t;
MouseButtons LastMouseButtonClicked;
Label lblStatus;
DateTime previousTick;
TimeSpan elapsed;
public Form1()
{
InitializeComponent();
lblStatus = new Label()
{
Text = "No click since tick."
,
Width = 1000
};
this.Controls.Add(lblStatus);
t = new Timer();
//A single tick represents one hundred nanoseconds or one ten-millionth of a second. There are 10,000 ticks in a millisecond, or 10 million ticks in a second.
//t.Interval = (int)(100 / TimeSpan.TicksPerMillisecond);//0.01 ms
t.Interval = 1000;
t.Tick += T_Tick;
t.Enabled = true;
this.MouseClick += Form1_MouseClick;
elapsed = TimeSpan.Zero;
}
private void T_Tick(object sender, EventArgs e)
{
if (elapsed == TimeSpan.Zero)
{
elapsed += new TimeSpan(0, 0, 0, 0, 1);
}
else
{
elapsed += DateTime.Now - previousTick;
}
switch (LastMouseButtonClicked)
{
case MouseButtons.Left:
//Action...
lblStatus.Text = "MouseButtons.Left " + elapsed.Seconds;
break;
case MouseButtons.Right:
//Action...
lblStatus.Text = "MouseButtons.Right " + elapsed.Seconds;
break;
default:
lblStatus.Text = "No click since tick. " + elapsed.Seconds;
break;
}
previousTick = DateTime.Now;
}
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
switch (e.Button)
{
case MouseButtons.Left:
LastMouseButtonClicked = e.Button;
t.Interval = 1000;
break;
case MouseButtons.Right:
LastMouseButtonClicked = e.Button;
t.Interval = 3000;
break;
}
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
If you are really really lazy and don't want to read the answer in my comment or redo the logic, you can perhaps modify your code like this (if this was your intent all along):
private void timer1_Tick(object sender, EventArgs e)
{
if (MouseButtons == MouseButtons.Left)
{
//Action...
}
if (MouseButtons == MouseButtons.Right)
{
//Action...
}
}
MouseButtons as in Control.MouseButtons
This is the method that is used to get the mouse button state within a timer_tick, with no need for a mouse click event, as per your request.
UPDATE Could you please mention what kind of timer are you using? They all have different behaviours and gotchas.
System.Windows.Forms.Timer, System.Timers.Timer and System.Threading.Timer.
I ask because sometimes there is an AutoReset property that you should set to true if you want more than one timer_tick to occur. I could be wrong, but this sounds like what you are describing, so it's worth a shot!
#Soenhay: I suspect that OP wanted to "loop and execute actions every t ticks" WHILE the mouse is held down. a.f.a.i.k. MouseClick triggers after MouseUp. You could modify the code to use MouseButtons (the static WinForms oddity) to check the state of the buttons.
#OP: Without you posting additional code, there is no way I see for anyone to help you further other than taking stabs in the dark with random code. Right now you have at least 3 examples similar to what you need, new knowledge about the static MouseButtons class, so I think you can and should take it from here or else you learn nothing!

Form timer doesn't start

So I just started learning C# and using forms. I have been able to create a digital clock and tinker with this and that, but now I'm trying to make a basic UI for a derpy game and my timer doesn't work.
First - what I'm trying to accomplish: A simple decrementing timer from 60 seconds (*clock style (mm:ss)).
Second, here's what I have:
public partial class Form1 : Form
{
private int counter = 60;
public Form1()
{
InitializeComponent();
label1.Text = TimeSpan.FromMinutes(1).ToString("m\\:ss");
}
private void pictureBox2_Click(object sender, EventArgs e)
{
}
private void timer1_Tick(object sender, EventArgs e)
{
counter--;
if (counter == 0)
{
timer1.Stop();
label1.Text = counter.ToString();
MessageBox.Show("Time's Up!!");
}
}
private void label1_Click(object sender, EventArgs e)
{
var startTime = DateTime.Now;
var counter = (TimeSpan.FromMinutes(1)).ToString("m\\:ss");
timer1 = new Timer();
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Interval = 1000;
timer1.Start();
label1.Text = counter.ToString();
}
}
Appreciate the feedback and knowledge!
From the codes that I see, your timer is working but you are not updating it in each count, you are updating when the timer finishes -
private void timer1_Tick(object sender, EventArgs e)
{
counter--;
if (counter == 0)
{
timer1.Stop();
label1.Text = counter.ToString(); // *** Look here
MessageBox.Show("Time's Up!!");
}
}
You should update the timer in each tick, so take the update label code out of the if block -
private void timer1_Tick(object sender, EventArgs e)
{
counter--;
label1.Text = counter.ToString(); // should work
if (counter == 0)
{
timer1.Stop();
MessageBox.Show("Time's Up!!");
}
}
and also reset the counter in each cycle -
private void label1_Click(object sender, EventArgs e)
{
var startTime = DateTime.Now;
var counter = (TimeSpan.FromMinutes(1)).ToString("m\\:ss");
timer1 = new Timer();
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Interval = 1000;
timer1.Start();
label1.Text = counter.ToString();
this.counter = 60
}
NOTE: I am really not sure if this code will throw any access
violation error, due to updating the UI in a different thread or not.
If so, then you have to use async/await or events/delegates to
update UI.
Let me know, if this throws error, then I will give you the async/await version.
This works fine for me. I would give progress updates as the time is countdown to show that it is working. For example, if you did this in label, you could do something like the following:
private void timer1_Tick(object sender, EventArgs e)
{
counter--;
label1.Text = counter.ToString();
if (counter == 0)
{
timer1.Stop();
MessageBox.Show("Time's Up!!");
}
}
Notice that the label1.Text = counter.ToString(); line has been moved before the counter == 0 check, so that it is able to provide feedback for all counter values.
As well, you may accidentally launch several timer1 instances if you do not keep track of how many you spawn using new Timer(). There are various ways to do this, but you could simply check whether timer1 already exists and counter == 0 before creating a new instance. You could perform this check as a guard clause (ie. return if either of those conditions are matched).
private void label1_Click(object sender, EventArgs e)
{
var startTime = DateTime.Now;
if (timer1 == null || (timer1 != null && counter == 0)) return;
counter = (TimeSpan.FromMinutes(1)).ToString("m\\:ss");
timer1 = new Timer();
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Interval = 1000;
timer1.Start();
label1.Text = counter.ToString();
}
If you want this countdown to start automatically, you can put this directly into the constructor, or put it into another method and call it from the constructor like so:
public Form1()
{
InitializeComponent();
StartCountdown();
}
private void StartCountdown()
{
var startTime = DateTime.Now;
/* the rest of your original label1_Click code goes here ... */
}

Simple Timer in C#

I have this code
private void picTop_MouseEnter(object sender, EventArgs e)
{
if (timer1.Tick == 10)
{
picBottom.Visible = true;
picTop.Visible = false;
timer1.Stop();
}
else
{
MessageBox.Show("ERROR You cannot view this section at this time.\nPlease try again later.");
}
}
private void picBottom_MouseEnter(object sender, EventArgs e)
{
picBottom.Visible = false;
picTop.Visible = true;
timer1.Start();
}
My timerinterval is set at 1000ms (so 1 second)
I only want the user to go into the top panel again after 10 seconds.
Some help would be greatly appreciated.
Current error I get: timer1.Tick is red underlined, error=
"The event 'System.Windows.Forms.Timer.Tick' can only appear on the left hand side of += or -="
Timer.Tick is not property its an event.
Use it like
timer1.Tick +=
{
picBottom.Visible = true;
picTop.Visible = false;
timer1.Stop();
}
For interval use timer.Interval
timer.Interval = 10000;
Ok. I think I understand what you're trying to achieve...
You have 2 areas on your form called "Top" & "Bottom"
Once the user enters & subsequently leaves the top area, you don't want them to be able to enter again for 10 seconds. is that correct?
So you've got a few problems... first of all, Tick is an event to which you would attach a method to be fired when it is raised. it's not an integer you can check. The only integer property on a timer of relevance for timing for is called Interval
But aside from that I don't think your method is going to be particularly effective.
Perhaps a better idea would be to add a MouseExit event to the top area. and disable that area for 10 seconds. and use a timer to re-enable it.
timer1.Tick += timer1_Tick;
public void Top_MouseExit (object sender, EventArgs e)
{
PicTop.Visible = false; // or hide/disbale it some other way
Timer1.Interval = 10000; //10 seconds
Timer1.Start();
}
public void timer1_Tick(object sender, EventArgs e)
{
timer1.Stop();
PicTop.Visible = true; //renable the top area
}

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