I want to add functionality to my WinForms so that when it starts a counter starts which will be in hh:mm. I know this can be done using a timer. I have made a time label which displays the current time, but I don't know how to start the timer when the form is loaded. Is there any method or class for that?
Place Timer component to your form (drag it from ToolBox - it's imporant, because timer should be registered as form's component to be disposed correctly when form closes). Set timer's Interval property to 60000 (that's equal to one minute). And subscribe to Tick event:
void timer1_Tick(object sender, EventArgs e)
{
if (endTime < DateTime.Now)
{
MessageBox.Show("Time is out!");
timer1.Stop();
return;
}
timeLabel.Text = (endTime - DateTime.Now).ToString(#"hh\:mm");
}
On Form_Load event handler start timer and save countdown end time:
private DateTime endTime; // field to store end time
void Form1_Load(object sender, EventArgs e)
{
endTime = DateTime.Now.AddMinutes(120); // set countdown to 120 minutes
timer1.Start();
}
The creation of a timer is very simple and straight forward:
Timer t1 = new Timer();
t1.Interval = 100;
t1.Tick+=new EventHandler(t1_Tick);
t1.Start();
void t1_Tick(object sender, EventArgs e)
{
}
For more information see http://msdn.microsoft.com/en-us/library/system.timers.timer(v=vs.80).aspx
Related
Hey just wondering if anyone could help me out with a problem I'm encountering with a timer in my windows form application. Here is the code I'm using:
private void game_Timer_Tick(object sender, EventArgs e)
{
while (true)
{
int count = 0;
count++;
timeLabel.Text = TimeSpan.FromSeconds(count).ToString();
}
}
The problem I'm having is that whenever the window that this applies to opens and then after that nothing happens and I'm unable to do anything. When removing this code the window works fine so I'm unsure why its not working in relation to this section of code. Any thoughts? Thanks
If you want to display number of seconds since timer start, then declare field for holding start time:
private DateTime startTime;
Assign this field when you are starting timer:
game_Timer.Interval = 1000; // fire event each second
startTime = DateTime.Now;
game_Timer.Start();
And use it in Tick handler:
private void game_Timer_Tick(object sender, EventArgs e)
{
timeLabel.Text = (DateTime.Now - startTime).ToString();
}
What is wrong with your code? You have infinite loop inside Tick event handler. So when event fires first time, you are entering this loop and never exit it. And you are unable to do anything, because your application is busy with constant updating time label.
You can also use counter instead of saving timer start time. But you will need field anyway:
private int count = 0;
And event handler:
private void game_Timer_Tick(object sender, EventArgs e)
{
timeLabel.Text = TimeSpan.FromSeconds(++count).ToString();
}
i´m doing a winform app, and the timer isn´t working fine. First time works, and then, it doesn´t.
Here is the code:
public void GetNewTurn(Turn turn)
{
_tmrStarTime = DateTime.Now;
timer1.Start();
timer1.Tick += tmr1_Tick;
}
private void tmr1_Tick(object sender, EventArgs e)
{
//timer code here
timer.stop();
}
So, the idea is:
GetNewTurn is a function which is invoked from another place. The first time which I invoke it, works fine, then doesn´t. I put a breakpoint inside the tmr1_Tick, and i can see that it just works the first time, then, doesn´t.
In the Timer properties, i set Enable = True.
What i´m doing wrong?
Thanks!
You shoudn't stop the tmr1_Tick in the first tick
public void GetNewTurn(Turn turn)
{
_tmrStarTime = DateTime.Now;
timer1.Start();
timer1.Tick += tmr1_Tick;
}
private void tmr1_Tick(object sender, EventArgs e)
{
//the code for each tick
}
Only add the handler once in the constructor or OnLoad override.
timer1.Tick += tmr1_Tick;
public void GetNewTurn(Turn turn)
{
_tmrStarTime = DateTime.Now;
timer1.Start();
}
when I start the timer ..timel is incremented normally ..but as soon as I stop the timer i.e. call the click_TimerStop function and start the timer again...the timel variable is incremented by timel+=2..and when I repeat the process ..it is increased by timel+=3..and it goes on and on ...how do I correct this ?..
DispatcherTimer clktimer = new DispatcherTimer();
private void click_TimerStart(object sender, RoutedEventArgs e)
{
clktimer.Start();
clktimer.Interval =new TimeSpan(0,0,1);
clktimer.Tick +=clktimer_tick;
}
private int timel = 0;
private void clktimer_tick(object sender, object e)
{
timel++;
timerSecond.Text = timel.ToString();
}
private void click_TimerStop(object sender, RoutedEventArgs e)
{
clktimer.Stop();
}
add
clktimer.Tick -=clktimer_tick;
before
clktimer.Tick +=clktimer_tick;
you'll unsubscribe and subscribe to event, so only one handler will be active at a time
and It's better to call start() after you set all settings to timer
It's because you're continually adding the clktimer_tick event handler each time you start the timer. Initialize your timer somewhere where it will only be called once and not every time you start, because there's no need to keep setting the same settings each time.
The Timer following is System.Windows.Forms.Timer
C# Code:
Timer myTimer = new Timer();
myTimer.Interval = 10000;
myTimer.Tick += new EventHandler(doSth);
myTimer.Start();
The timer will doSth every 10 seconds, but how to let it doSth immediately when starting?
I tried to create a custom timer which extends Timer, but I can't override the Start method.
For now, my code is:
myTimer.Start();
doSth(this, null);
I don't think it's good. How to improve it?
It's perfect. Don't change a thing.
I'm not sure of your exact requirements but why not put the code inside your timer callback inside another method?
e.g.
private void tmrOneSec_Tick(object sender, System.EventArgs e)
{
DoTimerStuff();
}
private void DoTimerStuff()
{
//put the code that was in your timer callback here
}
So that way you can just call DoTimerStuff() when your application starts up.
The timer has to have form level scope, and it's not clear that you have that. I whipped up a small example out of curiosity and it is working for me:
private void Form1_Load(object sender, EventArgs e)
{
txtLookup.Text = "test";
DoSomething();
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
DoSomething();
}
private void DoSomething()
{
txtLookup.Text += "ticking";
}
Every 10 seconds it appends another "ticking" to the text in the textbox.
You say,
"The timer will doSth every 10 seconds, but how to let it doSth immediately when starting?"
I say, call doSth immediately before calling the timer's start method
Is it possible to use a timer to show text in a label for like 3 sec ?
F.E. When you saved something and it was successful, you'd get a text message "success!" for 3 second and then return to the original page.
Anyone knows how to do this using a label or a messagebox ?
Yes, it s possible...
You may start the timer at where you set the text of the label to "succcess" and set it to tick after 3 seconds and then at the timer_ticks event, you may redirect to the page you want.
Edit: the code to start the timer - This is a simple windows form having one button and one label
public partial class Form1 : Form
{
//Create the timer
System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();
public Form1()
{
InitializeComponent();
//Set the timer tick event
myTimer.Tick += new System.EventHandler(myTimer_Tick);
}
private void button1_Click(object sender, EventArgs e)
{
//Set the timer tick interval time in milliseconds
myTimer.Interval = 1000;
//Start timer
myTimer.Start();
}
//Timer tick event handler
private void myTimer_Tick(object sender, System.EventArgs e)
{
this.label1.Text = "Successful";
//Stop the timer - if required
myTimer.Stop();
}
}
sure, that is possible. your going to want to do it with javascript/jquery on the client side to avoid a page refresh, i am thinking. here is a link to how to run javascript on a timer.