I want to show timer on UI such that when aplication star executing timer starts with 00:00:00 and when it completed its execution timer stops. Timer should show timing per second while running.
You can use the System.Windows.Forms.Timer, which is created for scenarios like yours. You can read more about in MSDN.
You should use the following code snippet as sample:
Timer timer = new Timer();
timer.Interval = 1000;
timer.Tick += new System.EventHandler(timer_Tick);
timer.Start();
private void timer_Tick(object sender, System.EventArgs e)
{
this.Text = string.Format("{0:hh:MM:ss}", DateTime.Now);
}
Notice that you should dispose the Timer when you do not needed.
Related
I have written a windows service that fetch some data from a database and perform some functions every minute. I have a timer setup in the initialize code segment.
public WindowsService()
{
InitializeComponent();
// Set up a timer that triggers every minute.
System.Timers.Timer timer1 = new System.Timers.Timer();
timer1.Interval = 60000; // 60 seconds
timer1.Elapsed += new System.Timers.ElapsedEventHandler(this.OnTimer);
timer1.Start();
}
private void OnTimer(object sender, EventArgs e)
{
//StartProcess();
}
After the deployment it worked without any issue. But when the date is changed to next day (eg:deployed on 29th June and the current date is 30th June), the scheduler is not performing. After I do a service restart manually, it performed as normal. What can be the issue with the timer?
I beleive your timer is getting garbage collected. Declare the timer variable outside of the function so it never goes out of scope.
I have a software that reads data from my router.
Everything is working - but I have to press a buton called "refresh" if I want to see the data refreshing...
This should work in the background after I have connected to the device.
How can I do it automatically - every 10 seconds?
I have tried this:
Add timer to a Windows Forms application
It seems my code doesn't know System.Windows.Forms.Timer class.
Use System.Windows.Forms.Timer class
private Timer timer1;
public void InitTimer()
{
timer1 = new Timer();
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Interval = 10000; // 10 seconds / 10000 MillSecs
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
isonline();
}
Thanks to Stecya in Execute specified function every X seconds
I am teaching myself C# and, as part of this, am trying to develop an iOS countdown timer app that is to play a .wav sound file X seconds after a timer initiating button has been clicked as the timer value has gone from X to 0.
In an attempt to do this I have tried using the System.Timers namespace but have been unable to figure out how to program the countdown timer described above. Below is my incomplete code (code that obviously does not fulfill the above described function but might be a part of the full code that would fulfill that function):
partial void UIButton1416_TouchUpInside(UIButton sender)
{
url = NSUrl.FromFilename("Sounds/bell.wav");
bell = new SystemSound(url);
int RoundedTimerValue = Convert.ToInt32(Math.Round(TimerSlider.Value, 0));
System.Timers.Timer timer = new System.Timers.Timer();
timer.Interval = 60000;
timer.Enabled = true;
}
Does anyone know how to create the described countdown timer / Trigger an event X seconds after a button has been clicked?
Example Code.
Timer timer = new Timer();
timer.Interval = 60000;
timer.Elapsed += new ElapsedEventHandler((x,y) => {
//Do whatever you want
timer.Stop();
});
Put the below code in the Button Click Handler and make the timer variable global.
timer.Start();
Or you can leave everything in the Button's click handler, not a big deal.
Explanation:
The timer class has an event called Elapsed which is called when the specified number of milliseconds in the timer's Interval gets over. with the line
timer.Elapsed += new ElapsedEventHandler((x,y) => {...
we are assigning a Delegate(Virtual function) to be called when the timer is up. therefore any code within the braces{} will be called at every Timer.Interval milliseconds. we stop the timer at that time as we don't want it to keep running and generate a lot of events.
Update 2:
Normally , EventHandlers are Defined using
return_type functionName(object sender, EventArgs e);
But since the delegate is virtual, so is the parameter. x corresponds to sender and y corresponds to e.
that event handler code can also be written as below
void someFunction(object sender, ElapsedEventArgs e)
{
timer.Stop();
}
and then,
timer.Elapsed += new ElapsedEventHandler(someFunction);
As for the '=>' you can read about Lambda Expressions Here
In my application I'm using two Timer, each Timer use a BackgroundWorker. Here the declaration:
DispatcherTimer timer1 = new DispatcherTimer();
DispatcherTimer timer2 = new DispatcherTimer();
BackgroundWorker worker1 = new BackgroundWorker();
BackgroundWorker worker2= new BackgroundWorker();
I using timer1 for perform an heavy method with a BackgroundWorker and timer2 for execute another BackgroundWorker that check the content of a file.
In this way I assign the event to BackgroundWorkers:
worker1.DoWork += worker_DoWork;
worker1.RunWorkerCompleted += worker_RunWorkerCompleted;
worker1.WorkerSupportsCancellation = true;
worker2.DoWork += worker_DoWork2;
worker2.RunWorkerCompleted += worker_RunWorkerCompleted2;
worker2.WorkerSupportsCancellation = true;
Now timer1 have a range of 15 minutes so the BackgroundWorker execute the heavy method each 15 minutes. And timer2 have a range of 1 second. With the timer1 all working good, but the problems are coming when I've added the timer2.
As I said before this timer allow me to start a method that read a file through the worker2, this file have a property, if this property change I need to perform some special activity. Until here no problem.
What I did is the following:
//This method is called by MainWindow
public ReadFile()
{
//before this I already assigned to timer1 the tick event and start
timer2.Tick -= new EventHandler(Event_Tick);
timer2.Tick += new EventHandler(Event_Tick);
timer2.Interval = new TimeSpan(0, 0, 1);
timer2.Start();
}
This is the Tick event associated to timer2
private void Event_Tick(object sender, EventArgs e)
{
if (!worker1.IsBusy) //I skip the reading, worker1 is busy
{
timer1.Stop(); //stop the first timer
worker2.RunWorkerAsync();
}
else
{
Console.WriteLine("worker1 is busy!");
}
}
I don't need to add here the DoWork, is just a parsing of a file, very useless for the question. When worker2 complete the task I did this:
private void worker_RunWorkerCompleted2(object sender, RunWorkerCompletedEventArgs e)
{
timer1.Start();
ReadFile();
}
How you can see I start the timer1 again, and execute again the ReadFile method. Now if timer1 has reached the interval, so 15 minutes has passed, should execute the timer1.Tick += new EventHandler(Heavy_Tick); that execute the DoWork to worker1. But the timer1 never start.
I can't figure out to this, what am I doing wrong?
Now I get it!
You want to execute worker1 every 15 minutes and worker2 every second but only when worker1 is not busy. Your problem is this here:
if (!worker1.IsBusy) //I skip the reading, worker1 is busy
{
timer1.Stop(); //stop the first timer
worker2.RunWorkerAsync();
}
and this:
public ReadFile()
{
//before this I already assigned to timer1 the tick event and start
timer2.Tick -= new EventHandler(Event_Tick);
timer2.Tick += new EventHandler(Event_Tick);
timer2.Interval = new TimeSpan(0, 0, 1);
timer2.Start();
}
Set both timer intervals and tick event handlers during startup, e.g. Form_Load()or at the beginning of Main(). Start them there too. You should not have to stop any timer at all!
By setting the interval, all you have to do is handle the Tick() event. Remove your .Start() and Stop() calls from your WorkerCompletedand Tick methods and you should do fine.
So a lot could be going on here but you should make sure that:
You timer isn't storing it's old progress and you are checking for a certain length of time before stopping. This will automatically cause the timer to stop when restarting.
The timer.stop() function is not disposing your object to an un-restart-able state.
You aren't accessing the timer variable through some pointer that is maintain a stopped value. (Unlikely but annoying when it happens)
I'd personally consider just pausing the timer and resetting the progress, instead of fully stopping it since this is causing issues.
I am trying to repeat a code execution after predefined time passes and i don't want to mess up things by using threads. Is the below code a good practice?
Stopwatch sw = new Stopwatch(); // sw constructor
EXIT:
// Here I have my code
sw.Start();
while (sw.ElapsedMilliseconds < 100000)
{
// do nothing, just wait
}
System.Media.SystemSounds.Beep.Play(); // for test
sw.Stop();
goto EXIT;
Use a timer instead of labels and StopWatch. You are doing busy waiting, tying up the CPU in that tight loop.
You start a timer, giving it an interval to fire on (100000 milliseconds), then run your code in the event handler for the Tick event.
See Comparing the Timer Classes in the .NET Framework Class Library in MSDN magazine.
You could use a timer what Oded suggested:
public partial class TestTimerClass : Form
{
Timer timer1 = new Timer(); // Make the timer available for this class.
public TestTimerClass()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
timer1.Tick += timer1_Tick; // Assign the tick event
timer1.Interval = 1000; // Set the interval of the timer in ms (1000 ms = 1 sec)
timer1.Start(); // Start the timer
}
void timer1_Tick(object sender, EventArgs e)
{
System.Media.SystemSounds.Beep.Play();
timer1.Stop(); // Stop the timer (remove this if you want to loop the timer)
}
}
EDIT: Just want to show you how to make an easy timer if you don't know how to :)