I am creating a stopwatch type application. I've used a label to display time. When application starts, the label is initialized to '00:00:00' and I want to increment its time by every 1 second.
I am trying to accomplish this job by using timer.
In your timer get the system time so your timer must be with very small interval like 200ms. To calculate your time just calculate the currentTime - startTIme in seconds.
If I am getting you right, it may surely work. Set initial label Text as "00:00:00". Set timer interval as 1000.
private void btnStartWatch_Click(object sender, EventArgs e)
{
timer1.Enabled = true;
}
private void btnPauseWatch_Click(object sender, EventArgs e)
{
timer1.Enabled = false;
}
int i = 1;
DateTime dt = new DateTime();
private void timer1_Tick(object sender, EventArgs e)
{
label1.Text = dt.AddSeconds(i).ToString("HH:mm:ss");
i++;
}
Hope it helps.
You want the TimeSpan structure.
Something like:
TimeSpan current = new TimeSpan(0);
// In your update loop:
current += TimeSpan.FromSeconds(1);
I have a timer on one of my apps.
private int _seconds;
public string TimeDisplay
{
get
{
TimeSpan ts = new TimeSpan( 0, 0, _seconds );
return string.Format("{0,2:00}:{1,2:00}:{2,2:00}", ts.Minutes, ts.Minutes, ts.Seconds);
}
}
All you have to do is have your timer_tick even increment _seconds and NotifyPropertyChanged() if you're binding to it. Either way, TimeDisplay will have your result.
i hope understand.
private void Button1_Click(System.Object sender, System.EventArgs e)
{
Timer1.Interval = 1000;
Timer1.Start();
}
private void Timer1_Tick(System.Object sender, System.EventArgs e)
{
this.Label1.Text = DateTime.Now.ToString("hh/mm/ss");
}
Regards
Related
Soo I am making a stopwatch program, and I run into a little problem while making it stop and start.
This is the situation — I press "StartButton" and then I press "StopButton", but after pressing "StartButton" again, then it starts counting from the time it already counted.
The Timer function:
int i = 0;
private void timer1_Tick(object sender, EventArgs e)
{
TimeSpan time = TimeSpan.FromSeconds(i);
textBox1.Text = time.ToString(#"hh\:mm\:ss");
i++;
}
The StopButton function:
private void button4_Click(object sender, EventArgs e)
{
button3.Visible = true;
button4.Visible = false;
timer1.Stop();
timer1.Enabled = false;
textBox1.Text = "00:00:00";
}
The StartButton function:
private void button3_Click(object sender, EventArgs e)
{
button4.Visible = true;
button3.Visible = false;
timer1.Enabled = false;
timer1.Start();
textBox1.Text = "00:00:00";
}
I've tried to just make the "textBox1" to write "00:00:00", but it does not work at all.
(PS I'm bad at C#).
I would also have added a field with a start value:
private DateTime _timeStart = DateTime.Now;
Starting / Restarting:
_timeStart = DateTime.Now;
timer1.Start();
Displaying:
TimeSpan time = (DateTime.Now - _timeStart).TotalSeconds;
textBox1.Text ...
And... If you need to Pause the timer.
I would also have added and used these fields for handling the Paused time:
private DateTime _timePauseStart = DateTime.Now;
private TimeSpan _timeSpanPaused;
Begin Paused:
timer1.Stop();
_timePauseStart = DateTime.Now;
End Paused:
_timeSpanPaused += DateTime.Now - _timePauseStart;
timer1.Start();
Displaying:
TimeSpan time = (DateTime.Now - _timeStart - timeSpanPaused).TotalSeconds;
textBox1.Text ...
I just understand your question. Timer start from 0 everytime you Stop and Start it.
Consider to use Stopwatch class. With Stopwatch you can always continue where it is paused.
In order to restart stopwatch, use
sw.Reset();
sw.Start();
or
sw.Restart();
To continue where you left, use
timer1.Stop();
timer1.Start();
I am quite new to using the chart coding.But i manage to display chart on a click of the button. And 2nd click will change the "x-axis" as i set it as time.
Is there a way to auto update every 5 for the "X-axis" ?? As i know timer is needed to set the interval timing.
private void timer1_Tick(object sender, EventArgs e)
{
timer1.Start();
this.Time.Text = System.DateTime.Now.ToString("hh:mm:ss tt");
}
private void GetData_Click(object sender, EventArgs e)
{
sqlite_con1.Open();
try
{
sqlite_cmd = sqlite_con1.CreateCommand();
sqlite_cmd.CommandText = "SELECT * FROM Temperature where id=12";
sqlite_reader = sqlite_cmd.ExecuteReader();
while (sqlite_reader.Read())
{
this.chart1.Series["SAT"].Points.AddXY(Time.Text, sqlite_reader["Temp"]);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
sqlite_con1.Close();
}
Any help is much appreciated. Thanks.
you have to set timer time and sets its property and event handler into timer at specific time
Timer t = new Timer();
t.Interval = 5000; // for five second interval
timer1.Enabled = true;
timer1.Tick += new System.EventHandler(timer1_Tick);
and then you have to call you chart binding method in
private void timer1_Tick(object sender, EventArgs e)
{
timer1.Start();
this.Time.Text = System.DateTime.Now.ToString("hh:mm:ss tt");
//here --- which you are calling on GetData_Click event by making
//separate method and call it here also
}
Here's the pseudo code:
private void ForgetSave()
{
if (the SaveRegularly method hasn't been used within 3 mins)
MessageBox.Show("Would you like to save any changes before closing?")
......... the code continues.
}
else
{
this.close();
}
Does anybody know how to write the first line of the if statement?
Simply remember when the last save time was:
private const TimeSpan saveTimeBeforeWarning = new TimeSpan(0,1,0); //1 minute
private static DateTime _lastSave = DateTime.Now;
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if ((DateTime.Now - _lastSave) > saveTimeBeforeWarning)
{
if(MessageBox.Show("Would you like to save any changes before closing?") == DialogResult.Yes);
{
Save();
}
}
}
private void Save()
{
//save data
_lastSave = DateTime.Now
}
As Ahmed suggested you can use a timer and a flag to know when you have to display the message, I left you a piece of code to get you started
private const int SAVE_TIME_INTERVAL = 3 * 60 * 1000;
private bool iWasSavedInTheLastInterval = true;
private System.Windows.Forms.Timer timer;
public Form1()
{
InitializeComponent();
//Initialize the timer to your desired waiting interval
timer = new System.Windows.Forms.Timer();
timer.Interval = SAVE_TIME_INTERVAL;
timer.Tick += Timer_Tick;
timer.Start();
}
private void Timer_Tick(object sender, EventArgs e)
{
//If the timer counts that amount of time we haven't saved in that period of time
iWasSavedInTheLastInterval = false;
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (iWasSavedInTheLastInterval == false)
{
MessageBox.Show("Would you like to save any changes before closing?");
}
}
private void btnSave_Click(object sender, EventArgs e)
{
//If a manual save comes in then we restart the timer and set the flag to true
iWasSavedInTheLastInterval = true;
timer.Stop();
timer.Start();
}
I have a program that disables the lockscreen and stop a service in windows. I have two buttons Enable,Disable and a combo box that has preset times. When My program is ran and the user clicks Enable the program should disable lock screen until the user manually
clicks disable. What I am trying to accomplish is to keep the program from running all night long if user never hits disable. So by selecting a preset time out of the combo box the program will auto disable it self.
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
DateTime time = DateTime.Today;
for (DateTime _time = time.AddHours(16); _time < time.AddHours(18); _time = _time.AddMinutes(30))
{
comboBox1.Items.Add(_time.ToShortTimeString());
}
}
private static System.Timers.Timer _Timer;
private DateTime _lastRun = DateTime.Now;
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
string strTime_Start = DateTime.Today.ToString();
string strTime_End = comboBox1.SelectedItem.ToString();
}
public void button1_Click(object sender, EventArgs e)
{
button1.Enabled = false;
button2.Enabled = true;
_Timer = new System.Timers.Timer(10 * 60 * 1000);
_Timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
DisableLock();
}
private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
if (strTime_End < DateTime.Now.Date) //I think this would be where I need to have strTime_End?
{
_Timer.Stop();
_lastRun = DateTime.Now;
}
}
}
The simplest solution in my mind would be to keep an instance variable for your stop time, and each combobox item you have sets this stop time, the timer_tick event would simply check if it has passed that time. A blank item in the combo box can clear the variable.
private DateTime timeToStop;
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
timeToStop = DateTime.Now.Add(DateTime.Parse(comboBox1.Text));
}
catch(Exception)
{
timeToStop = new DateTime(3000, 01, 01, 00, 00, 00);
}
}
public void disableButton_Click(object sender, EventArgs e)
{
_Timer.Stop();
_lastRun = DateTime.Now;
}
private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
if (DateTime.Now >= timeToStop)
{
_Timer.Stop();
_lastRun = DateTime.Now;
// Disable regkey
}
}
from what i understood so far, you can just add :
comboBox1.Enabled = false;
when the time is elapsed, i.e. in the event.
I have a stopwatch timer that I've added to my program. It's working fine on my Win 7 machine, and on the Vista machines I've tried, but in XP, the hrs and mins zeros disappear when the timer starts, but will come back if I reset the timer. Here's all of my code that I have for the timer. I've removed everything that didn't seem necessary to diagnose the problem:
DateTime startTime, stopTime;
TimeSpan stoppedTime;
bool reset;
private void btnStopwatchStart_Click(object sender, EventArgs e)
{
// Start timer and get starting time
if (reset)
{
reset = false;
startTime = DateTime.Now;
stoppedTime = new TimeSpan(0);
}
else
{
stoppedTime += DateTime.Now - stopTime;
}
stopwatchTimer.Enabled = true;
}
private void btnStopwatchReset_Click(object sender, EventArgs e)
{
// Reset displays to zero
reset = true;
lblElapsed.Text = "00:00:00";
}
private void btnStopwatchPause_Click(object sender, EventArgs e)
{
// Stop timer
stopTime = DateTime.Now;
stopwatchTimer.Enabled = false;
}
private void stopwatchTimer_Tick(object sender, EventArgs e)
{
DateTime currentTime;
// Determine elapsed and total times
currentTime = DateTime.Now;
// Display times
lblElapsed.Text = HMS(currentTime - startTime - stoppedTime);
}
private string HMS(TimeSpan tms)
{
// Format time as string, leaving off last six decimal places
string s = tms.ToString();
return (s.Substring(0, s.Length - 6));
}
Older version of .NET, maybe? Your HMS() function critically depends on the number of digits generated by TimeSpan.ToString(). Here's a better way to format it:
private static string HMS(TimeSpan tms) {
return new DateTime(tms.Ticks).ToString("H:mm:ss");
}