NOTE: This question is related to this one as well
How to create an advanced countdown timer
I have a timer which is activated by a button that starts the countdown of the supposed activity. But I have a problem, when I press the same button again, the program must use another time (specified inside a datagrid) and start the countdown again, and if I press the button again, another time and so on.
Shall I use multiple timers or is there a way I can use the same timer, but with new ("reset") values if I press the button?
(If you guys want me to show more of the code, just tell me I'll post here)
private bool timeSet2 = false;
int f = 1;
private void timer3_Tick(object sender, EventArgs e)
{
DateTime timeConvert;
DateTime dateTime = DateTime.Now;
string timeOp = dataGridView1.Rows[f].Cells[2].Value + "";
f++;
if (!timeSet2) // only get the value once
{
DateTime.TryParse(timeOp, out timeConvert);
milliSecondsLeft = (int)timeConvert.TimeOfDay.TotalMilliseconds;
timeSet2 = true;
}
milliSecondsLeft = milliSecondsLeft - 1000;
if (milliSecondsLeft > 0)
{
var span = new TimeSpan(0, 0, 0, 0, milliSecondsLeft);
lblLeft.Text = span.ToString(#"hh\:mm\:ss");
}
else
{
timer3.Stop();
}
I need to fit a button right here so if I press it, my program will start another countdown. But I don't know if I'll have to create another time for this.
You can use the same timer and reset it for each countdown. But I think you are misunderstanding the the functionality of the timer. The timer_Tick event occurs every time the interval of the timer has elapsed. Update the milliSecondsLeft variable on your button click event.
You have to move some code to the button_Click event.
private void button1_Click(object sender, EventArgs e)
{
milliSecondsLeft = Convert.ToInt32(dataGridView1.Rows[f].Cells[2].Value)*1000;
f++;
timer3.Start();
}
Your timer_Tick event would then look like:
private void timer3_Tick(object sender, EventArgs e)
{
milliSecondsLeft = milliSecondsLeft - 1000;
if (milliSecondsLeft > 0)
{
var span = new TimeSpan(0, 0, 0, 0, milliSecondsLeft);
lblLeft.Text = span.ToString(#"hh\:mm\:ss");
}
else
{
timer3.Stop();
}
}
Some other things:
Are you sure you want to start with the second column of your dataGridView with int f = 1;
I did not understand your time conversion so I changed it. Now it expects the countdown time in your dataGridView to be in seconds. But perhaps your code is right for your purpose
Related
I am writing up a C# application using Winforms, and I need to collect some data based on my selection from a comboBox. I also have a start button that enables data collection, and a stop button that halts the data collection.
This is what I am capable of doing right now:
Measure all data from all channels by switching my selection on the comboBox (one channel at a time). The process goes like: select a channel- start button click - wait for data collection - stop button click
But here is what I want to do in code:
Select a channel - start button click - wait for data collection - stop button click
switch to next channel - start button click -wait for data collection - stop button click
................
repeat this process until done.
My question is: what should I adopt to achieve this?
I have been trying to use startButton.PerformClick( ) to enabling the buttons, however, I need to stop for a few seconds in between starting and stopping to wait for data collection.
You may ask why because this is very inefficient, but for some reason the DLL from the third party cannot collect data from all channels at the same time. So i have to manually switch my channel selection from the comboBox in order to collect all data at one go.
Please let me know if you have any suggestions.
private void timer_Tick(object sender, EventArgs e)
{
startButton.PerformClick();
}
private void timer2_Tick(object sender, EventArgs e)
{
stopButton.PerformClick();
}
private void checkAll_CheckedChanged(object sender, EventArgs e)
{
int i = 0;
while (i != 40) //there are a total of 40 channels
{
System.Windows.Forms.Timer mytimer = new System.Windows.Forms.Timer();
mytimer.Interval = 5000;
System.Windows.Forms.Timer mytimer2 = new System.Windows.Forms.Timer();
mytimer2.Interval = 7000;
mytimer.Start();
mytimer.Tick += new EventHandler(timer_Tick);
mytimer2.Start();
mytimer2.Tick += new EventHandler(timer2_Tick);
physicalChannelComboBox.SelectedIndex = i;
i++;
Thread.Sleep(5000);
}
}
Here is a simple routine shell that should help you. This uses a timer to poll if the data is complete (checking a boolean, which is currently set to true for testing). In your case you could probably just set the timers tick value to be the delay you want. If you have a way of knowing when the data is done being collected for the channel, that would be more preferable. This code runs standalone so you can test and configure it before starting to integrate it into your existing code. All it requires is a a listbox for viewing the logs.
public partial class DataCollectorForm : Form
{
private Timer timer = new Timer();
private int numberOfChannels = 40;
private int currentChannelNumber = 0;
private DateTime routineStartTime;
private DateTime routineStopTime;
private DateTime channelStartTime;
private DateTime channelStopTime;
public DataCollectorForm()
{
InitializeComponent();
timer.Interval = 250;
timer.Tick += Timer_Tick;
DataCollectionRoutineStart();
}
private void Timer_Tick(object sender, EventArgs e)
{
// Need to check if data collection for this channel is complete..
//
var isDoneCollectingData = true;
if (isDoneCollectingData)
{
ChannelDataCollectionStop();
currentChannelNumber++;
if (currentChannelNumber >= numberOfChannels)
{
DataCollectionRoutineComplete();
}
else
{
ChannelDataCollectionStart();
}
}
}
public void DataCollectionRoutineStart()
{
routineStartTime = DateTime.Now;
Log("Data Collection Routine Start");
currentChannelNumber = 0;
ChannelDataCollectionStart();
timer.Start();
}
private void ChannelDataCollectionStart()
{
channelStartTime = DateTime.Now;
Log("Data Collection Start : channel " + currentChannelNumber);
}
private void ChannelDataCollectionStop()
{
channelStopTime = DateTime.Now;
Log("Data Collection Stop : channel " + currentChannelNumber + " : elapsed " + (channelStopTime - channelStartTime));
}
private void DataCollectionRoutineComplete()
{
routineStopTime = DateTime.Now;
timer.Stop();
Log("Data Collection Routine Complete : elapsed " + (routineStopTime - routineStartTime));
}
private void Log(string msg)
{
loggingListBox.Items.Add(msg);
}
}
I've created a C# windows form application that uses a timer to clear the input boxes every 5 minutes. There is a label called lblTime that displays the amount of time elapsed at any given point while the application is open.
I would like to be able to disable or pause the Timer (Clock.Enabled = false) with a button click, and have lblTime stay on the amount of time elapsed when the button was clicked. However, due to the way that the elapsedTime variable is calculated (DateTime.Now - startTime), this value carries on changing even after the timer has been disabled.
So, to sum up:
lblTime displays running time as Clock ticks
Clock can be disabled by button click, but lblTime carries on incrementing
lblTime needs to stop on current value on same button click that disables Clock, and then be able to start counting again from that same value.
Code that starts Clock, initialises and updates lblTime is displayed.
Any help would this would be very much appreciated,
Thanks,
Mark
private void btnStart_Click(object sender, EventArgs e)
{
//Timers set to start ticking
Clock.Enabled = true;
startTime = DateTime.Now; //the milisecond that btnStart is clicked
initialiseClock();
initialiseIntervalCounter();
}
private void initialiseClock() //initialisation of Clock Timer
{
Clock = new System.Windows.Forms.Timer();
Clock.Tick += new EventHandler(Clock_Tick); //calls Clock EventHandler
Clock.Interval = 1000; //1 second in miliseconds
Clock.Start();
}
private void Clock_Tick(object sender, EventArgs e) //Clock EventHandler definition
{
updateTimeDisplay();
checkDisplay();
}
private void updateTimeDisplay()
{
elapsedTime = (DateTime.Now - startTime);
lblTime.Text = Convert.ToString(elapsedTime);
}
Use a bool flag and a TimeSpan and a counter for the seconds until the next clearing:
DateTime startTime = DateTime.Now;
TimeSpan elapsed = new TimeSpan(0);
bool running = true;
int clearInSeconds = 300;
private void Clock_Tick(object sender, EventArgs e)
{
// function one: count elapsed running time
if (running) elapsed = elapsed.Add(new TimeSpan(0, 0, 1));
lblTime.Text = startTime.Add(elapsed).ToLongTimeString();
// function two: clear stuff after interval:
if (clearInSeconds-- <= 0)
{
clearInSeconds = 300;
// clear your stuff now
}
}
Use your button click to switch between running and not running. I used a click on the label:
private void lblTime_Click(object sender, EventArgs e)
{
running = !running;
}
Change the method in which the countdown time is used. Use a TimeSpan datatype. Initialize the variable to 5 minutes New TimeSpan(0, 5, 0) and use it instead of a start time and Now().
In this code after starting timer again it starts from the current value instead of the vale it stopped. How to pause this timer?
public Page1()
{
InitializeComponent();
_rnd = new Random();
_timer = new DispatcherTimer();
_timer.Tick += new EventHandler(TimerTick);
_timer.Interval = new TimeSpan(0, 0, 0, 1);
}
void TimerTick(object sender, EventArgs e)
{
var time = DateTime.Now - _startTime;
txtTime.Text = string.Format(Const.TimeFormat, time.Hours, time.Minutes, time.Seconds);
}
public void NewGame()
{
_moves = 0;
txtMoves.Text = "0";
txtTime.Text = Const.DefaultTimeValue;
Scrambles();
while (!CheckIfSolvable())
{
Scrambles();
}
_startTime = DateTime.Now;
_timer.Start();
//GridScrambling.Visibility = System.Windows.Visibility.Collapsed;
}
private void Pause_Click(object sender, System.Windows.RoutedEventArgs e)
{
// TODO: Add event handler implementation here.
NavigationService.Navigate(new Uri("/Page4.xaml", UriKind.Relative));
_timer.Stop();
}
private void Play_Loaded(object sender, System.Windows.RoutedEventArgs e)
{
// TODO: Add event handler implementation here.
_timer.Start();
}
As this says that the Stop method only changes the IsEnabled property and this says that this property only prevents the Tick event to be raised, I don't think that there is a method to simply 'pause' the timer. The best way is to reinitialize the timer each time you have "paused" it, if you really want it to start clean again.
But I do not think that this is you real problem. When you pause your game the timer stops working. When you continue it the timer starts working again. When you now try the calculate the time from THIS moment till the start time, then you make a big mistake: you have to ignore the paused time. Because when you play the game 2s, then pause it for 10s and then continue the game, the timer shows 12s, instead of 2s, doesn't it? Maybe you should store the paused times in a variable and substract that from the real game time.
Is there any way to capture the time interval between mouse wheel scroll start and stop? Actually I want to capture the interval between the scrolling start and stop when I very quickly scroll the mouse wheel.
I have already looked at MouseWheel event but it don't fulfill my requirement. In senes that it always gives a value of Delta 120 or -120 but i want to call a function depending on the speed of the mouse scroll for example when i scroll the mouse normally i want to perform function 1 and when i scrolled the mouse very quickly i want to perform the function 2. In other words is there any way to distinguish between the mouse scroll high and normal speed.
Any advice will be appreciated.
can't you capture the mouse wheel events and see how long between them. Basically start a timer when you get a mouse wheel event and then in the next event see what the timer is at (and so how long has elapsed between the events) to determine the speed the wheel is being turned at? If the elapsedtime is smaller than a certain threshold, perform function2 and if it is faster than a certain threshold perform function 1.
You will probably have to set it to perform function 1 if the timer goes off in case they only do a single scroll.
In fact you might be able to do it this way:
start a timer (with an interval that indicates slow mouse wheeling) in the mouse wheel event, then if the timer goes off perform function 1. If the mouse wheel event happens again before the timer has gone off then reset the timer and increment a counter (to keep track of the number in wheel events since you did stuff) then start a second (longer) timer. if the counter is greater then a certain threshold perform function 2. When the second timer elapses, reset the counter. Something along those lines should give you the ability to fire function 1 when slow wheel turning and function 2 when the wheel is rapidly turned through a few 'clicks'.
this code should give a (very dirty) indication of the sort of thing I was thinking of. After playing a little I'm not really sure it's a good solution though....
private void mouseWheelHandler (object sender, MouseEventArgs e)
{
slowTimer.Enabled = false;
slowTimer.Stop ();
slowTimer.Interval = 200;
slowTimer.Start();
slowTimer.Enabled = true;
m_counter++;
Trace.WriteLine(string.Format("counter={0}", m_counter));
if (fastTimer.Enabled==false)
{
fastTimer.Enabled = true;
fastTimer.Interval = 150;
fastTimer.Start ();
}
if (m_counter>5)
{
Trace.WriteLine("called method 2");
m_counter = 0;
fastTimer.Stop ();
slowTimer.Enabled = false;
slowCheckTimer.Stop ();
slowCheckTimer.Interval = 250;
slowCheckTimer.Start();
slowCheckTimer.Enabled = true;
}
}
private void slowTimer_Tick(object sender, EventArgs e)
{
Trace.WriteLine("slow timer ticked");
if (slowCheckTimer.Enabled==false)
{
Trace.WriteLine ("called method 1");
}
slowTimer.Enabled = false;
}
private void fastTimer_Tick(object sender, EventArgs e)
{
fastTimer.Enabled = false;
Trace.WriteLine("fast timer ticked");
m_counter = 0;
fastTimer.Stop ();
}
private void slowCheckTimer_Tick(object sender, EventArgs e)
{
Trace.WriteLine("slow check timer ticked");
slowCheckTimer.Stop ();
slowCheckTimer.Enabled = false;
}
Take a look at the Control.MouseWheel event.
As suggested by the Sam Holder i am posting here a modified verion of his advice to help other programmers facing the same problem.
public partial class Form1 : Form
{
int m_counter = 0;
public Form1()
{
InitializeComponent();
// Attach Mouse Wheel Event
this.MouseWheel += new MouseEventHandler(Form1_MouseWheel);
}
void Form1_MouseWheel(object sender, MouseEventArgs e)
{
// Refresh Slow Timer
slowTimer.Enabled = false;
slowTimer.Stop();
slowTimer.Interval = 150;
slowTimer.Start();
slowTimer.Enabled = true;
// Incremenet counter
m_counter++;
// Start Fast Timer
if (fastTimer.Enabled == false)
{
fastTimer.Enabled = true;
fastTimer.Interval = 50;
fastTimer.Start();
}
// If this returns true call
// the fast scroll implementation
if (m_counter > 4)
{
Console.WriteLine("Quick Method Called");
m_counter = 0;
fastTimer.Stop();
slowTimer.Enabled = false;
slowCheckTimer.Stop();
slowCheckTimer.Interval = 200;
slowCheckTimer.Start();
slowCheckTimer.Enabled = true;
}
}
private void slowTimer_Tick(object sender, EventArgs e)
{
if (slowCheckTimer.Enabled == false)
{
Console.WriteLine("Slow Method Called");
}
slowTimer.Enabled = false;
}
private void fastTimer_Tick(object sender, EventArgs e)
{
fastTimer.Enabled = false;
m_counter = 0;
fastTimer.Stop();
}
private void slowCheckTimer_Tick(object sender, EventArgs e)
{
slowCheckTimer.Stop();
slowCheckTimer.Enabled = false;
}
}
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();
}