So I have a program that I need to be able to get the current time. This is a winform and I have a timer that starts up when the winform is loaded and the interval is 1000. Every tick it checks the time and sets a label on the winform to display that time. I use DateTime.Now.Hour; to determine the hour (which is just what I need). My problem is even though this code is on a timer it only displays the time that was when the winform started and doesnt update it. What do I do to get the current and updating hour of the day?
EDIT:
Here is the code
//code for hour variable
private int time = DateTime.Now.Hour;
//Code for timer
private void mainTimer_Tick(object sender, EventArgs e)
{
//code run every time mainTimer gets a tick
label1.Text = time.ToString();
}
Your class field won't be re-evaluated again until you set it explicitly.
This is how you should do it:
label1.Text = DateTime.Now.Hour.ToString();
private void Clock(object sender, EventArgs e)
{
DateTime dtn = DateTime.Now.Hour;
label1.Text = dtn.ToString();
}
then put timer tick on it
Related
This question already has answers here:
Refresh the form every second
(4 answers)
Closed 3 years ago.
I want to make a button run some code, then press itself again in Windows Forms.
When I call the button itself I get the error:
System.StackOverflowException
HResult=0x800703E9
Source=<Cannot evaluate the exception source>
StackTrace:
<Cannot evaluate the exception stack trace>
I want to make a resource monitor program to get myself familiarized with C#. Right now I'm stuck at the string processing and displaying a constantly changing string.
I'm using a randomly generated number as a placeholder, that I want to show and change permanently, imitating real data pulling.
The code I have:
public void Start_Click(object sender, EventArgs e){
var usage =new CpuUsage(); //placeholder class for getting the CPU use data
usage.setCPU(); //gets a random number
this.CPU.Text = usage.cpuUsage; //show the usage data on a textbox
Start_Click(null, EventArgs.Empty); //call this button again here
}
What I want to get look something like:
Get data
Show data using text box
Redo this
I think what you're looking for is the Timer control. You can set it to run at a certain interval, and define the code that runs at that interval. You can also control the starting and stopping of the timer, if you want to only start it when a button is pressed.
For example, drop a Timer control on your form and try out this code:
private void Form1_Load(object sender, EventArgs e)
{
// Set the interval to how often you want it to execute
timer1.Interval = (int)TimeSpan.FromSeconds(1).TotalMilliseconds;
// Set a method to run on every interval
timer1.Tick += Timer1_Tick;
}
public void Start_Click(object sender, EventArgs e)
{
// start or stop the timer
timer1.Enabled = !timer1.Enabled;
// Above we are just flipping the 'Enabled' property, but
// you could also call timer1.Start() (which is the same as
// setting 'Enabled = true') or timer1.Stop() (which is
// the same as setting 'Enabled = false')
}
// Put code in this method that should execute when the timer interval is reached
private void Timer1_Tick(object sender, EventArgs e)
{
var usage = new CpuUsage(); //placeholder class for getting the CPU use data
usage.setCPU(); //gets a random number
this.CPU.Text = usage.cpuUsage; //show the usage data on a textbox
}
Is this possible Background timer in Xamarin Forms?
I have three buttons Start/Pause/Stop and Timer Text for showing the timer in my app.
When the user clicks on start button i want to start the timer. After some time user will close the app but timer should run in the background until stop button clicks.
and I want to send lat log to the server every minute even if the app is closed
private void OnStartbuttonClicked(object sender, EventArgs e)
{
// Save the Time, when the Timer starts
}
private void OnStopbuttonClicked(object sender, EventArgs e)
{
DateTime starttime = DateTime.Parse("String with the Time, when the Timer starts");
DateTime endTime = DateTime.Now;
TimeSpan difference = endTime - starttime;
// difference ist the time of the timer
}
I hope this helps you
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 tried reading the documentation for the WinForms Timer class but I didn't understand it well enough. I want to have a timer that counts down from 60 to 0 seconds and a button that manually adds 10 seconds to the timer whenever pressed. My question is: "what do I need to do to programmatically set the 'value' of a timer"?
I realize this is a simple question, but the answer to it has eluded me. I would be really thankful if I could get some help.
Thanks in advance.
You need another variable to hold the time. The timer will be responsible for the ticking and it will update the time in your variable. So like this:
int timeLeft = 60;
private void timer1_Tick(object sender, EventArgs e)
{
if (timeLeft > 0)
{
timeLeft = timeLeft - 1;
}
else
{
timer1.Stop();
}
textBox1.Text = timeLeft.ToString();
}
private void StartTimer_Click(object sender, EventArgs e)
{
timer1.Interval = 1000;
timer1.Start();
}
private void AddTimeButton_Click(object sender, EventArgs e)
{
timeLeft = timeLeft + 10;
}
timer1 would be the timer, textBox1 for showing the time left, and the buttons should be self-explanatory.
The timer measures time in milliseconds (1000 = 1 second). If you want something to update every second set the .Interval to 1000. You will need a variable initially set to 60. In the timer's Tick event you will want to decrement that counter by one and update your UI. When you want to start counting down enable the timer with .Enabled = True. When the counter hits 0 disable the timer.
If you let us know what language you are writing this in (C#, VB, etc) someone can probably give you some actual code.
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