I have instantiated a timer like so:
System.Timers.Timer seconds = new System.Timers.Timer();
seconds.Elapsed += new ElapsedEventHandler(seconds_Tick);
seconds.Interval = 1;
seconds.Enabled = true; //start timer
I have created the tick event like so:
private void seconds_Tick(object sender, EventArgs e)//source
{
time++;
}//end clock_Tick()
time is an integer variable declared in the code.
I try to display the results like so (within a method):
txtProcessTime.Text = TimeSpan.FromSeconds(time).ToString();
This works great up until the timer runs longer than an hour so I then tried:
txtProcessTime.Text = TimeSpan.FromHours(time).ToString();
This shows an even more unusual/unexpected result.
I tried a few others but I reckon I'm using the wrong section..
I would like to code a timer that counts taking into consideration, milliseconds, seconds and hours and have the result displayed in a textbox. Can you help?
The timer is displayed in the format 00:00:00
The TimeSpan.FromHours issue displayed something along the lines of: 7070:xx:xx (I can't remember what the x's values were).
The TimeSpan.FromSeconds once the program has been running longer than an hour showed: 2:xx:xx (I can't remember what the x's values were).
The format is being displayed as mm:ss:milliseconds - Could it be that the minutes converted to single numbers once the 60 minutes has passed?
There is something apparently wrong here: Interval is specified in milliseconds, but you set it to 1. Then, you create the TimeSpan using FromSeconds.
So if you want an event every second, set it like this:
seconds.Interval = 1000;
If you still want it every millisecond, then change your TimeSpan:
txtProcessTime.Text = TimeSpan.FromMilliSeconds(time).ToString()
Instead of your current approach you may find this more usable, and easily modified for your requirements
using System.Diagnostics
Stopwatch sw;
public Form1()
{
InitializeComponent();
sw = new Stopwatch();
sw.Start();
}
private void button1_Click(object sender, EventArgs e)
{
textBox1.Text = sw.Elapsed.ToString();
}
Related
I need some help in making a count-down Timer that also increments a ProgressBar.
I have a Button that generates a random time (expressed in minutes) that will increment a ProgressBar, to use as a form of loader.
When the ProgressBar increments its value, I would like to show, in a Label, the time remaining.
Here is my code:
int RandomNumber;
int MinutesElapsed;
private void button1_Click(object sender, EventArgs e)
{
Random random = new Random((int)DateTime.Now.Ticks);
RandomNumber = random.Next(1, 121); // at (x, x) there is a limit from x to x+1
MinutesElapsed = 0;
QuestTimer1.Start(); // starts the timer
}
private void QuestTimer1_Tick(object sender, EventArgs e)
{
MinutesElapsed++;
double minutes = MinutesElapsed / 1.2;
progressBar1.Value = (int)minutes;
}
This may seem counterintuitive, but when implementing a "timer," there is no need for an actual timer to keep the time. You certainly don't need to set a timer and increment a variable every second-- your system clock already does that! Your program just needs to know the start time, end time, and current time, and at any given moment, in can compute the progress % and the time remaining.
When you start the process, take note of the current time and store the target completion time.
DateTime _startTime;
DateTime _endTime;
private void StartTimer_Click(object sender, EventArgs e)
{
_startTime = DateTime.Now;
var duration = random.Next(1, 121);
_endTime = _startTime.AddSeconds(duration);
}
Then when you wish to know the time remaining or progress, compute them:
public int SecondsRemaining => (_endTime - DateTime.Now).TotalSeconds;
public double PercentComplete => ((double)(_endTime - DateTime.Now).TotalMilliseconds) / (_endTime - _startTime).TotalMilliseconds;
You can call either of these properties at any time and they will always give you the percent complete and time remaining accurately. You don't need a separate timer at all!
However, you probably want to update the display every now and then. You need a timer for that, but it can run at any interval, and it's easy to write:
void Timer_Tick(object sender, EventArgs e)
{
this.TimeRemainingLabel.Text = SecondsRemaining.ToString() + " seconds";
this.ProgressBar.Value = (int)(PercentComplete * 100);
}
A few notes that may be useful:
Your Button (you should give it a proper name) can be used to start/stop the Timer and generate a new random number, representing minutes, using a Random object (declared as a static Field - not so important here, but because of its internal functionality, it's more reliable this way).
The generated random value initializes a TimeSpan object (totalTime) that store the total time, to keep as reference.
You can set a measure of time directly in the TimeSpan constructor: if the values - expressed in minutes here - overflows the normal measure (60 minutes in this case), the TimeSpan class computes the correct value (i.e., if you set the Minutes component to 90 in the constructor, the TimeSpan will be automatically compute 1 Hour and 30 minutes).
Another TimeSpan (minutesElapsed) will store the time elapsed.
The Timer's Interval is set to 1000ms.
The ProgrssBar should keep its standard range of values: (0 - 100).
You can see it as the percentage of completion. Each time the Timer ticks, we'll adapt the difference between the total time and the elapsed time, squeezing it in this range of values .
TimeSpan totalTime;
TimeSpan minutesElapsed;
static Random rnd = new Random();
private void button1_Click(object sender, EventArgs e)
{
QuestTimer1.Stop();
minutesElapsed = new TimeSpan(0, 0, 0);
// 0 Hours, N Minutes, 0 Seconds
totalTime = new TimeSpan(0, rnd.Next(1, 121), 0);
lblTimeLeft.Text = totalTime.ToString(#"hh\:mm\:ss");
QuestTimer1.Start();
}
The Timer ticks - 1 second has passed - so increment the elapsed time by one second and calculate the difference between the total time and the current number of elapsed seconds.
TimeSpan objects support common operators to perform addition and subtraction and provide different properties to evaluate their value in Ticks, Milliseconds, Seconds etc.
Each second, a Label (here named lblTimeLeft) is updated, showing how many seconds are left (acts as a count-down), while the ProgressBar increments it's Value.
When minutesElapsed >= totalTime, the Timer is stopped.
private void QuestTimer1_Tick(object sender, EventArgs e)
{
minutesElapsed += TimeSpan.FromSeconds(1);
lblTimeLeft.Text = (totalTime - minutesElapsed).ToString(#"hh\:mm\:ss");
progressBar1.Value = (int)(minutesElapsed.TotalMinutes / totalTime.TotalMinutes * 100D);
if (minutesElapsed.TotalMinutes >= totalTime.TotalMinutes) {
QuestTimer1.Stop();
}
}
I have a WinForms program with a sign in system. On sign in, a class called session is created. This holds all information relevant to the sign in (much like the name "session" indicates).
Now I would like for this session to only have a limited duration. So after, lets say 30 minutes, the class destroys itself (or its parent does, that's not important).
How do I do this? I have tried searching Google, but apparently keywords like "Duration" and "Timespan" returns results which is in no way related to what I want to do.
You can use Interval timer tick with interval which start EventHandler every N seconds (you can start it once and do your job)
public class Form1 : Form
{
private Timer updateTimer;
public Form1()
{
updateTimer = new Timer();
updateTimer.Tick += new EventHandler(FixedUpdate);
updateTimer.Interval = 30000; //Time in miliseconds (30 seconds)
updateTimer.Start();
}
private void FixedUpdate(object sender, EventArgs e)
{
//Destroy your form first time it thicks after N time
}
}
I found this post and created a class that used it to detect inactive time and it works great. I set it for one minute and after one minute I can get it to "do stuff". What I am trying to do is only do something every "x" minutes of inactive time; i.e. every 5 minutes do this if things have been inactive and do not repeat again 'til X time has elapsed.
Now, I could set my timer to fire every 5 minutes instead of every second, but I would like to be able to "reset" the count of inactive time instead. Any suggestions?
This is for using the DispatchTimer in C# and WPF.
Just create a class level variable, increment it on your timer, and reset it when you get activity. Create a timer, say tmrDelay with an increment of 10000 milliseconds, and a button, btnActivity to reset the count, and do this:
private int tickCount = 0;
private const int tick_wait = 30;
private void tmrDelay_Tick(object sender, EventArgs e)
{
tickCount++;
if (tickCount > tick_wait)
{
DoSomething();
tickCount = 0;
}
}
private void btnActivity_Click(object sender, EventArgs e)
{
tickCount = 0;
}
It sounds like you want something like the following:
static DispatcherTimer dt = new DispatcherTimer();
static LastInput()
{
dt.Tick += dt_Tick;
}
static void dt_Tick(object sender, EventArgs e)
{
var timer = (DispatcherTimer)sender;
var timeSinceInput = TimeSpan.FromTicks(GetLastInputTime());
if (timeSinceInput < TimeSpan.FromMinutes(5))
{
timer.Interval = TimeSpan.FromMinutes(5) - timeSinceInput;
}
else
{
timer.Interval = TimeSpan.FromMinutes(5);
//Do stuff here
}
}
This will poll every 5 minutes to see if the system has been idle for 5 minutes or more. If it's been idle for less than 5 minutes it will adjust the time so that it will go off again at exactly the 5 minute mark. Obviously then if there has been activity since the timer was set it will be adjusted again so it will always aim for 5 minutes of idleness.
If you really want to reset the active time then you will actually need to trigger some activity either by moving the mouse or sending a keypress
I'm looking for a way to add a timer (or stopwatch) that will start counting from 0 the moment the application is launched or a button is clicked, and keeps counting even after the user navigates through different pages, and then be able to display how much time has passed in the last page of the application. I've been messing around with the DispatcherTimer class, but to be honest, I'm having trouble understanding it. Any help, or even a nod in the right direction would be greatly appreciated!
If you want to use a time, you could add one on the page showing time!
Add this code to the constructor or somewhere else where you want to activate the timer. (The App.StartTime is the same as i wrote in the other answer)
DispatcherTimer timer = new DispatcherTimer();
timer.Tick +=
delegate(object s, EventArgs args)
{
TimeSpan time = (DateTime.Now - App.StartTime);
this.timenow.Text = string.Format("{0:D2}:{1:D2}:{2:D2}", time.Hours, time.Minutes, time.Seconds);
};
timer.Interval = new TimeSpan(0, 0, 1); // one second
timer.Start();
You just have to store the time when your app launch and then subtract the current time from the stored value.
in your App.cs store the time when application launch:
private static DateTime _starttime = DateTime.Now;
public static DateTime StartTime
{
get
{
return _starttime;
}
}
In your page or any where you need to get the current time the application has run, you just have to subtract then current time from the stored time. I have used it in a button click handler, see below:
private void timebutton_Click(object sender, RoutedEventArgs e)
{
TimeSpan time = (DateTime.Now - App.StartTime);
this.timenow.Text = string.Format("{0:D2}:{1:D2}:{2:D2}", time.Hours, time.Minutes, time.Seconds);
}
Recently I was trying to make a calendar application that will display the current year-month-date to the user. The problem is, if the user is gonna keep my application running even for the next day, how do I get notified ?? How shall I change the date displayed ? I don't wanna poll the current date to update it. Is this possible in c#.
Note: I tried out the SystemEvent.TimeChanged event, but it works only if the user manually changes the time / date from the control panel.
#OddThinking's answer will work (you could set a timer for the interval instead of sleeping). Another way would be to set a timer with a 1 minute interval and simply check if the system date has changed. Since you are only executing some lightweight code once a minute, I doubt the overhead would be noticable.
public void Main()
{
var T = new System.Timers.Timer();
T.Elapsed += CallBackFunction;
var D = (DateTime.Today.AddDays(1).Date - DateTime.Now);
T.Interval = D.TotalMilliseconds;
T.Start();
}
private void CallBackFunction(object sender, System.Timers.ElapsedEventArgs e)
{
(sender as System.Timers.Timer).Interval = (DateTime.Today.AddDays(1).Date - DateTime.Now).TotalMilliseconds;
}
Can you simply work out the number of seconds until midnight, and then sleep for that long?
Try looking into monitoring WMI events, you should be able to create a Wql event query that monitors the day of week change (i.e. ManagementEventWatcher etc) and then setup an event handler that fires when the event arrives.
using System;
using System.Management;
class Program
{
public static void Main()
{
WqlEventQuery q = new WqlEventQuery();
q.EventClassName = "__InstanceModificationEvent ";
q.Condition = #"TargetInstance ISA 'Win32_LocalTime' AND TargetInstance.Hour = 22 AND TargetInstance.Minute = 7 AND TargetInstance.Second = 59";
Console.WriteLine(q.QueryString);
using (ManagementEventWatcher w = new ManagementEventWatcher(q))
{
w.EventArrived += new EventArrivedEventHandler(TimeEventArrived);
w.Start();
Console.ReadLine(); // Block this thread for test purposes only....
w.Stop();
}
}
static void TimeEventArrived(object sender, EventArrivedEventArgs e)
{
Console.WriteLine("This is your wake-up call");
Console.WriteLine("{0}", new
DateTime((long)(ulong)e.NewEvent.Properties["TIME_CREATED"].Value));
}
}
How about a thread that checks for change in date. The thread can have some events that the controls that need this information can subscribe to.