I've a time ticker event, I want to write it to a label in format ( hours:minutes:seconds 00:00:00 ) it does not print the 0 values! it shows like ::1 when starts to count... what to do? Solved, thanks for all replies
private void timer_Tick(object sender, EventArgs e)
{
seconds++;
if(seconds == 59)
{
minutes++;
seconds = 0;
}
if(minutes == 59)
{
hours++;
minutes = 0;
}
this.label1.Text = string.Format("{0:##}:{1:##}:{2:##}", hours, minutes, seconds);
}
A better method is using DateTime and TimeSpan objects. For example:
DataTime start = <set this somehow>
void timer_Tick(...)
{
var elapsed = DateTime.Now - start;
label1.Text = string.Format("{0:HH:mm:ss}", elapsed);
}
Best would be to use TimeSpan and DateTime as others have said. If you want to continue using your current method, though, change the format string to:
string.Format("{0:00}:{1:00}:{2:00}", hours, minutes, seconds)
The 00 format will cause two digits to always be printed, even zeroes.
Try a thought experiment - set seconds and minutes to 58, and walk through your code and see what happens...
Use a TimeSpan
Related
I have 2 datetime pickers and i want to display number of days between them on a text box if a user selects a date.
The problem with my code is that it is not giving me correct answers and the TimeSpan doesn't seem to work.
When i choose different dates it gives me answer 10.999998008713 days instead of 11 days and I don't know if i need to do math roundup
private void btnCalc_Click(object sender, EventArgs e)
{
DateTime start = ArrivalDate.Value;
DateTime finish = DepartureDate.Value;
TimeSpan numberOfNights = finish-start;
double TotalDays= numberOfNights.Days;
txtBoxNum.Text = (numberOfNights.ToString());
}
private void ArrivalDate_ValueChanged(object sender, EventArgs e)
{
DepartureDate.Value = ArrivalDate.Value.AddDays(1);
}
private void DepartureDate_ValueChanged(object sender, EventArgs e)
{
if (DepartureDate.Value < ArrivalDate.Value)
{
MessageBox.Show("Cannot be less than previous date");
DepartureDate.Value = ArrivalDate.Value.AddDays(1);
snip...
}
}
i dont know if i need to do math roundup
Neither do we. 10.999998008713 days is about 10 days, 23 hours, 59 minutes and 59 seconds. Do you want to count that as 11 days? If so what about 10 days, 23 hours, 59 minutes and 58 seconds? At some point you are going to have to decide what the cutoff between 10 days and 11 days is. This probably depends on your business rules and we don't know that.
Also, numberOfNights.Days is the day component of your numberOfNights value; so for November 4 2013 that would be 4. Are you sure that's what you want? You don't want numberOfNights.TotalDays, which would be the elapsed time between your finish and start in days?
this one did the trick
int TotalDays= numberOfNights.Days;
txtBoxNum.Text = ((int)Math.Ceiling(numberOfNights.TotalDays)).ToString();
I have a datetime, I want to show the difference from DateTime.Now to received datetime and bind it. The result should be something like this:
1d 15h 13m 7s
What is the best way to do it? StringFormat? IValueConverter?
I'd suggest using the Timespans ToString method and custom TimeSpan format strings
Timespans if you aren't already aware are designed for measuring time intervals like this and can be convenienty obtained by subtracting one date from another.
var startDate = new DateTime(2013,1,21);
var currentDate = DateTime.Now;
TimeSpan interval = currentDate - startDate;
string intervalInWords = String.Format("{0:%d} days {0:%h} hours {0:%m} minutes {0:%s} seconds", interval);
Console.WriteLine(intervalInWords);
This will print out something like
267 days 10 hours 45 minutes 21 seconds
As has been noted in comments because these datetimes may be in different timezones/daylight saving times you should be very careful using this technique. Using UTCtime for both which is consistent throughout the whole year should be sufficient if that is feasible. In general it is often best policy to save all datetimes as UTC along with the timezone/offset (if required) and then if they are needed in a specific timezone offset convert on display.
Use TimeSpan
Example:
DateTime oldDate = new DateTime(2002,7,15);
DateTime newDate = DateTime.Now;
// Difference in days, hours, and minutes.
TimeSpan ts = newDate - oldDate;
// Difference in days.
int differenceInDays = ts.Days;
Now you can change it according to your requirement.
The other answers are correct from the formatting point of view, but just to address the WPF angle, I'm guessing you want to update a label/textbox so it constantly contains an accurate duration?
If so, you can do this with the timer and the dispatcher.
Timer code:
//duration in milliseconds, 1000 is 1 second
var timer = new Timer(1000);
timer.Elapsed += timer_Elapsed;
timer.Start();
Timer elapsed code:
//this is set elsewhere
private readonly DateTime _received;
void timer_Elapsed(object sender, ElapsedEventArgs e)
{
Application.Current.Dispatcher.Invoke(
DispatcherPriority.Normal,
new Action(()
=> //replace label1 with the name of the control you wish to update
label1.Content =
string.Format("{0:%d} days {0:%h} hours {0:%m} minutes {0:%s} seconds"
, (DateTime.Now - _received))));
}
You can use TimeSpan, also look out [here][1]
[1]: Showing Difference between two datetime values in hours i would suggest you to go through TimeSpan.
DateTime startDate = Convert.ToDateTime(2008,8,2);
DateTime endDate = Convert.ToDateTime(2008,8,3);
TimeSpan duration = startDate - endDate;
Create a property like DateProp of type DateTime to which you'll bind on your XAML , and assuming your property is Other_date_here, initialize it like this:
DateProp = DateTime.Now.Subtract(Other_date_here);
Last, on your XAML, bind it and set the formatting like this:
Text="{Binding Date, StringFormat=d day H hours m minutes s seconds}"
(or whatever other format you like:).
I want to make a Windows Form Application which only shows a timer as:
xx days
xx hours
xx minutes
xx seconds
No option for setting the timer or anything, i want to do that in the code
However, the problem is i want it to count down from current time (DateTime.Now)
to a specific date. So i end up with the time left as TimeSpan type. I'm now in doubt how to actually display this, so it's actually working, and updating (counting down)
Can't seem to find a tutorial that helps me, so i hope i may be able to get some help here :)
You can use a timespan format string and a timer:
DateTime endTime = new DateTime(2013,01,01,0,0,0);
private void button1_Click(object sender, EventArgs e)
{
Timer t = new Timer();
t.Interval = 500;
t.Tick +=new EventHandler(t_Tick);
TimeSpan ts = endTime.Subtract(DateTime.Now);
label1.Text = ts.ToString("d' Days 'h' Hours 'm' Minutes 's' Seconds'");
t.Start();
}
void t_Tick(object sender, EventArgs e)
{
TimeSpan ts = endTime.Subtract(DateTime.Now);
label1.Text = ts.ToString("d' Days 'h' Hours 'm' Minutes 's' Seconds'");
}
following will give you the countdown string
//Get these values however you like.
DateTime daysLeft = DateTime.Parse("1/1/2012 12:00:01 AM");
DateTime startDate = DateTime.Now;
//Calculate countdown timer.
TimeSpan t = daysLeft - startDate;
string countDown = string.Format("{0} Days, {1} Hours, {2} Minutes, {3} Seconds til launch.", t.Days, t.Hours, t.Minutes, t.Seconds);
Use ToDate.Subtract( Now ) then all you have to do is to format the TimeSpan that you get and show it on the form.
You should be able to google something like this and get literally hundreds of results.
http://channel9.msdn.com/coding4fun/articles/Countdown-to, here's the first one that looked good.
I want to display duration with milliseconds on a web page. So far I have done this:
I managed to display this output on a label: 00:02:50, but I want to display milliseconds as well, so the result should look like this 00:02:50:000. How do I achieve this?
Code behind:
protected void Page_Load(object sender, EventArgs e)
{
DateTime startTime = DateTime.Now;
// sleep for 2.5s
Thread.Sleep(2500);
DateTime stopTime = DateTime.Now;
TimeSpan duration = stopTime - startTime;
Result.Text = duration.ToString("mm':'ss':'ff");
}
First of all, if you're timing things I would recommend using the StopWatch class as that's what it's there for. You can find it in the System.Diagnostics namespace: System.Diagnostics.Stopwatch.
You can instantiate a new one and start measuring the elapsed amount of time with one line of code: var stop = System.Diagnostics.Stopwatch.StartNew(); and then stop the timer with the stop method: stop.Stop();. You can then return the elapsed time using the Elapsed property var elapsed = stop.Elapsed;.
Then in order to display the elapsed time with milliseconds you would call the ToString method on the elapsed timespan with the correct parameters.
So putting it all together your code would look like this:
protected void Page_Load(object sender, EventArgs e)
{
var timer = System.Diagnostics.Stopwatch.StartNew();
// sleep for 2.5s
Thread.Sleep(2500);
timer.Stop();
var elapsed = timer.Elapsed;
Result.Text = elapsed.ToString("mm':'ss':'fff");
}
Hope that helps!
James
Your current code should be displaying minutes, seconds, and hundredths of a second.
Result.Text = duration.ToString("mm':'ss':'ff");
To display milliseonds instead of hundredths of a second:
// output: 00:02:500
Result.Text = duration.ToString("mm':'ss':'fff");
See the documentation for Custom Date and Time Format Strings.
The doc says: "fff" gives you:
The milliseconds in a date and time value.
You're using "ff" which gives you:
The hundredths of a second in a date and time value.
So, change your code to:
duration.ToString("mm':'ss':'fff");
I think you're confused. In your case 00:02:50 means 2 seconds and 50 hundredths of second. If you want to display milliseconds, use format like mm':'ss':'fff (notice the one added f). This will print something like 00:02:500, i.e. 2 seconds and 500 thousandths of second, or 2 s 500 ms.
But this doesn't mean your measurements will be precise down to millisecond. That's not what DateTime.Now is meant to do. If you want to make measurements this precise, you should use StopWatch.
Use TimeSpan.ToString Method with custom format.
The returned string is formatted with the "c" format specifier and has the following format:
[-][d.]hh:mm:ss[.fffffff]
Elements in square brackets ([ and ]) may not be included in the returned string. Colons and periods (: and.) are literal characters.
Result.Text = duration.ToString("mm:ss:fff");
or
Result.Text = duration.ToString("hh:mm:ss.fff");
Ref :Custom Date and Time Format Strings, The "fff" Custom Format Specifier
DateTime date1 = new DateTime(2008, 8, 29, 19, 27, 15, 18);
CultureInfo ci = CultureInfo.InvariantCulture;
Console.WriteLine(date1.ToString("hh:mm:ss.fff", ci));
// Displays 07:27:15.018
Otherwise just use the properties from the timespan like this:
var result = String.Format("{0}:{1}:{2}", duration.Minutes, duration.Seconds, duration.Milliseconds);
Result.Text = result
This way I think you gain more control over what you want to display, instead of formatting the timespan in the ToString()-method which more easily allows typos to be made...
Hope this helps!
Update:
To add the hours as well this is how it'll look like:
var result = String.Format("{0}:{1}:{2}:{3}", duration.Hours, duration.Minutes, duration.Seconds, duration.Milliseconds);
How to check if 20 minutes have passed from current date?
For example:
var start = DateTime.Now;
var oldDate = "08/10/2011 23:50:31";
if(start ??) {
//20 minutes were passed from start
}
what's the best way to do this?
Thanks :)
You should convert your start time to a UTC time, say 'start'.
You can now compare your start time to the current UTC time using:
DateTime.UtcNow > start.AddMinutes(20)
This approach means that you will get the correct answer around daylight savings time changes.
By adding time to the start time instead of subtracting and comparing the total time on a TimeSpan you have a more readable syntax AND you can handle more date difference cases, e.g. 1 month from the start, 2 weeks from the start, ...
var start = DateTime.Now;
var oldDate = DateTime.Parse("08/10/2011 23:50:31");
if ((start - oldDate).TotalMinutes >= 20)
{
//20 minutes were passed from start
}
var start = DateTime.Now;
var oldDate = DateTime.Parse("08/10/2011 23:50:31");
if(start.Subtract(oldDate) >= TimeSpan.FromMinutes(20))
{
//20 minutes were passed from start
}
Parse oldDate into a DateTime object (DateTime.Parse).
Subtract the parsed date from start. This will return a TimeSpan.
Inspect TotalMinutes.
I was able to accomplish this by using a JodaTime Library in my project. I came out with this code.
String datetime1 = "2012/08/24 05:22:34";
String datetime2 = "2012/08/24 05:23:28";
DateTimeFormatter format = DateTimeFormat.forPattern("yyyy/MM/dd HH:mm:ss");
DateTime time1 = format.parseDateTime(datetime1);
DateTime time2 = format.parseDateTime(datetime2);
Minutes Interval = Minutes.minutesBetween(time1, time2);
Minutes minInterval = Minutes.minutes(20);
if(Interval.isGreaterThan(minInterval)){
return true;
}
else{
return false;
}
This will check if the Time Interval between datetime1 and datetime2 is GreaterThan 20 Minutes. Change the property to Seconds. It will be easier for you know. This will return false.
var end = DateTime.Parse(oldDate);
if (start.Hour == end.Hour && start.AddMinutes(20).Minute >= end.Minute)