need help to work with Timer object

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HI...
I want to display the current time on a listview, this time automatically changes with the clock running Windows...

Posted 18-Apr-11 7:09am

guendouz bachir

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Sandeep Mewara 19-Apr-11 4:53am

And your effort is?

3 solutions

Solution 2

Insert a Timer in form and double click on timer icon and in Timer function write this code :
note : set enable timer and set interval 100.
This a timer function :

private void timer1_Tick(object sender, EventArgs e)
       {
           Label.Text = DateTime.Now.ToLongTimeString();
       }

Posted 18-Apr-11 7:35am

esmailian

Updated 18-Apr-11 7:36am

v2

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Sergey Alexandrovich Kryukov 18-Apr-11 14:18pm

This is the worst of timers, you would better recommend System.Timers.Timer.
Showing of DateTime is good. So, my 4.
Thread should be preferred over timer! Please see my answer.
--SA

guendouz bachir 18-Apr-11 14:21pm

I want it still works,exactly with windows7 time ??

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-04-18T08:14:00

Using any kind of timer will give you more trouble than a thread — highly recommended.
Just to give you an idea: did you plan for situations when your timer event handler is not yet exited at the moment the next one if fired? There are many other traps. The worst one is System.Windows.Forms.Timer.

Create a thread infinitely running in a loop, using System.Threading.Thread.Sleep for the required amount of time. Your can trigger any UI operation based on this repetition, but remember, you cannot call anything on the UI directly from this non-UI thread. Instead, you should use the methods Invoke or BegingInvoke of System.Threading.Dispatcher or System.Windows.Forms.Control (absolutely does not matter what instance of control, it should be any control really participating in you UI, for example, your form). You will find very detailed explanation of how it works and further directions in my past Answers:
Control.Invoke() vs. Control.BeginInvoke()[^],
Problem with Treeview Scanner And MD5[^].

Just in case: my collection of references to my past Answers on threads, could be very useful:
How to get a keydown event to operate on a different thread in vb.net[^].

—SA

#realJSOP · Accepted Answer · 2011-04-18T07:15:00

Solution 1

Just use a System.Timers.Timer object, and in the tick event handler, update your listview.

Posted 18-Apr-11 7:15am

#realJSOP

Comments

Sergey Alexandrovich Kryukov 18-Apr-11 14:17pm

This is correct, good it is not a Forms timer. My 5, but...

How about our usual recommendation to use thread instead of timer?
It did not give up, please see my Answer.
--SA

#realJSOP 18-Apr-11 14:55pm

I didn't feel like writing the code - again. I freakin' hate Timer objects, but very few share the senitment, especially new programmers who see "the easy way", use it, and then bitch/moan because they don't really have any control over what's happening (and they realize that the timer tick event is blocked/non-responsive if it fires too often during long processes).

Sergey Alexandrovich Kryukov 18-Apr-11 16:39pm

At to me the writing code, I reuse my old Answers. I share all your hate of timers. Those thinking the "the easy way" simply don't know what's easy, I observed the frustration for lost time before my eyes. Saying "you see, I told you!" was a bit late, the bitter lesson already learned. In some cases, it was a good amount of wasted time from the company project.
--SA

Sergey Alexandrovich Kryukov 18-Apr-11 16:42pm

Just got a reply from OP: "I work [...] not the console mode". No use! just a waste of time!
--SA

need help to work with Timer object

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