how to make a timer, working in same way as system timer

venus najad

7y986Visual Basic .NET

hello, im trying to make a timer in my program... i dont want use the system timer...

for this i have made two extra calsses, ClockDisplay and NumberDisplay...

in ClockDisplay i have TimeTick() method, but when i compile it doesnt happen any...

can someone help me? i appreciate,, thanks...

12 Replies

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Amit Gupta7y ago
Accepted answer
Thread.Sleep(..) in windows form freezes the UI, you can alternatively apply one line of code Application.DoEvents(); just below Thread.Sleep line. Better use async threading here for smooth operation
venus najad7y ago
Hello amit... i have another issue and hope that you can help me out...

hello... i need help with making my outer whileloop runs slower than the inner while loop...
to make them that both runs at the same moment, i have used continue method...
but when i compile, the inner loop runs with the same rate as outer one...i have used thread.sleep(1000) for outer loop and thread.sleep(1) for inner loop... when i compile, the innner loop goes each second instead of each milisecond.. my continue make the inner loop dependent on outer loop... how can i steer he thread.slepp... appreciate any help...
the codes are:
while (t == true)
{
try {
cd.TimeTick();//tick time
lblTime.Text = cd.GetTime();//put time
Thread.Sleep(1000); //delay with one second
Application.DoEvents();
while (tLu == true)
{
try {
cdLu.TimeTick();//tick time
lblLunch.Text = cdLu.GetTime();//put time
Thread.Sleep(1); //delay with one milisecond
Application.DoEvents();
throw new Exception();
}
catch (Exception)
{
throw new Continue();
}
}
[Serializable]
internal class Continue : Exception
{
public Continue()
{
}
public Continue(string message) : base(message)
{
}
public Continue(string message, Exception innerException) : base(message, innerException)
{
}
protected Continue(SerializationInfo info, StreamingContext context) : base(info, context)
{
}
}
venus najad7y ago
Thanks Amit... i added this.Visible=true; in the first line and it works... i can now close the question...kind regards
venus najad7y ago
thanks Amit for your respond... i put Application.DoEvents() in the first line too, but when i run the program it stands build succeeded... it doenst show anything!!!???

private void Form1_Load(object sender, EventArgs e)
{
Application.DoEvents();
var ss = lblTime.Text.Split(':');//read the time and differ
ClockDisplay cd = new ClockDisplay(int.Parse(ss[0]), int.Parse(ss[1]), int.Parse(ss[2]), true);//set time
while (t == true) //for (int i = 0; i < 10; ++i)//
{
cd.TimeTick();//tick time
lblTime.Text = cd.GetTime();//put time
//await Task.Delay(1000);
Thread.Sleep(1000); //delay with one second
Application.DoEvents();
}
}
Amit Gupta7y ago
Itbdepends upon your requirement, when you want to start your timer, as you had started the loop in form load event, the form will appear on work finishes. You can use Application.DoEvents(); at the first line or you can use a seperate button to start the timer.
venus najad7y ago
Amit, i have another issue in the same program...
i sholdnt use any button to start the clock... therfore i put the codes inside Load Form1(..,::):

private void Form1_Load(object sender, EventArgs e)
{

var ss = lblTime.Text.Split(':');//read the time and differ
ClockDisplay cd = new ClockDisplay(int.Parse(ss[0]), int.Parse(ss[1]), int.Parse(ss[2]), true);//set time
while (t == true) //for (int i = 0; i < 10; ++i)//
{
cd.TimeTick();//tick time
lblTime.Text = cd.GetTime();//put time
//await Task.Delay(1000);
Thread.Sleep(1000); //delay with one second
Application.DoEvents();
}
}

when i run, it doesnt show my form only that the build is successful !!!??
should use another methods like Form1_Click or something else? thanks if you respond... besides i dont know how to close the question... regards
Amit Gupta7y ago
Async threading was introduced in .net 4, it is not depend on vs versions. .net framework always make improvements and bug fixes in their releaaes. It should be a good habit to close the question, if answers fulfill the requirements.
venus najad7y ago
thanks Amit, it works now...
im affraid that async only is available for tasks and i should use only await Task.Delay(), while both my VS 2015 and VS 2017 hasnt delay method in system.threading.tasks!!!???
venus najad7y ago
the links weren't so much help... my problem is when i put my codes inside a loop, it goes the whole loop and then show the time... my codes are:

public Form1()

{

InitializeComponent();

lblTime.Text = DateTime.Now.ToLongTimeString();

}

bool t = true;

private void button1_Click(object sender, EventArgs e)

{

for (int i = 0; i < 10; ++i)//while (t == true)

{

var ss = lblTime.Text.Split(':');//read the time and differ

ClockDisplay cd = new ClockDisplay(int.Parse(ss[0]), int.Parse(ss[1]), int.Parse(ss[2]), true);//set time

cd.TimeTick();//tick time

lblTime.Text = cd.GetTime();//put time

Thread.Sleep(1000); //delay with one second

}

}

private void button2_Click(object sender, EventArgs e)

{

t=false;

}

when i use while loop, it hangs and no result appears on the form.

when i use for loop, it shows the result after 10 second, not each second(step)???!!!

appreciate any help...
Amit Gupta7y ago
Its a good thing to know how the code works. Although I found a conrol which performs much better than Timer class named Xtimer https://agsoftwares.weebly.com/controls.html
venus najad7y ago
thanks vivek
Vivek Kumar7y ago
Hi,
Please have a look to below links.

https://www.tutorialspoint.com/Timer-in-Chash

https://stackoverflow.com/questions/12535722/what-is-the-best-way-to-implement-a-timer

http://csharp.net-informations.com/gui/timer-cs.htm