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);
Related
I need to make a calculation of passed and remaining time of an operation in C#.
I have the start of the operation saved in a string format of HH:MM:SS
I have a default time length of the operation in a string format of HH:MM:SS
Now I would like to calculate:
The remaining time / extra time: For example if the operation is still below the default length, it should display -HH:MM:SS, and if the operation took longer than the default time, it should display +HH:MM:SS
If the operation took longer, I would also like to have a double value of HH,MM in % style. For example: 3hours and 30 minutes should be displayed as 3,5
Both results to be displayed next to each other.
I know I have to translate the string values into DateTime and/or TimeSpan values to do calculations, but currently I have no idea how to calculate since the first operation for example would not give me a negative value, but just get back in time [22:30:00 of yesterday].
Try this..
var start = "17:05:11"; // Pass this as a parameter
var startTime = DateTime.Parse(start);
var defaultDuration = TimeSpan.FromMinutes(2);
TimeSpan operationDuration = startTime - DateTime.Now;
TimeSpan diff = defaultDuration - operationDuration;
if (operationDuration > defaultDuration)
{
Console.Out.WriteLine($"+{diff.Hours}:{diff.Minutes}:{diff.Seconds}");
}
else
{
Console.Out.WriteLine($"-{diff.Hours}:{diff.Minutes}:{diff.Seconds}");
Console.Out.WriteLine($"{diff.Hours},{Math.Round(((double)(diff.Minutes * 100 / 60)),0, MidpointRounding.AwayFromZero)}");//example: 3hours and 30 minutes should be displayed as 3,5
}
At first save the default time as TimeSpan. Then you can take DateTime.Now and save it when the operation starts. Take another DateTime.Now later when it finished. After this point you can calculate the TimeSpan for the current operation. Then you can calculate the difference from these two TimeSpans as another TimeSpan. It can be positive or negativ and with these values you can do whatever you want.
TimeSpan defaultDuration = new TimeSpan(3, 30, 0);
DateTime begin = DateTime.Now;
//Do some work
DateTime end = DateTime.Now;
TimeSpan thisDuration = end - begin;
Console.WriteLine("Default: " + defaultDuration.ToString("hh\\:mm\\:ss"));
Console.WriteLine("This time: " + thisDuration.ToString("hh\\:mm\\:ss"));
Console.Write("Difference: ");
if (thisDuration > defaultDuration)
Console.Write("-");
Console.WriteLine((thisDuration - defaultDuration).ToString("hh\\:mm\\:ss"));
I have been facing issue on time subtraction in C#.
For example I start timer on 4/5/2017 11:56:27 PM and end the timer in 5/5/2017 12:10:27 AM when I subtract this it shows me result 23 hours.
I want that it show exact time like 14 minutes. I am sharing my code as well.
double rate1 = Convert.ToDouble(rate.Text);
double value = rate1 / 3600;
DateTime dt = DateTime.Parse(text3.Text);
DateTime edt = DateTime.Parse(text5.Text);
var res = dt.Subtract(edt).ToString().Replace('-', ' ');
DateTime tt = Convert.ToDateTime(res);
DateTime dt1 = DateTime.Parse(text4.Text);
DateTime edt1 = DateTime.Parse(text6.Text);
var res1 = dt.Subtract(edt1).ToString().Replace('-', ' ');
double sec = TimeSpan.Parse(res).TotalSeconds;
double sec1 = TimeSpan.Parse(res1).TotalSeconds;
text7.Text = res.ToString();
text8.Text = res1.ToString();
It seems like you're showing a lot of code that's difficult to reproduce for us, and the variable names are not the clearest. I'm assuming dt stands for "datetime", and edt stands for "end datetime". If that's correct, then you're subtracting the end date from the start date instead of the other way around (you should subtract the smaller from the larger).
So, here's how to get the difference between start and end (I'm using Hindi culture info for this):
var dateFormatCulture = new CultureInfo("hi-IN");
var startDate = DateTime.Parse("4/5/2017 11:56:27 PM", dateFormatCulture);
var endDate = DateTime.Parse("5/5/2017 12:10:27 AM", dateFormatCulture);
var difference = endDate.Subtract(startDate);
You say you want "the exact time like 14 minutes". I'm not sure if that means you don't want to show the rest of the values, but here are a few ways you can display it.
Console.WriteLine($"General short string format: {difference:g}");
Console.WriteLine(
"Custom string format: {0} days, {1} hours, {2} minutes, {3} seconds",
difference.Days, difference.Hours, difference.Minutes, difference.Seconds);
Console.WriteLine("In terms of minutes, the total minutes difference is: {0}",
difference.TotalMinutes);
Notice that there's a difference between the second an third example in the methods being called to show the minutes . Minutes will display just the minutes portion of the difference. TotalMinutes will display the entire difference in terms of minutes. In your case they are the same, but if the difference was 1 hour and 14 minutes, Minutes would still be 14, but TotalMinutes would be 74.
The output looks like:
It looks like you might have a copy/paste error. In this line, did you mean to reference dt1 rather than dt?
var res1 = dt.Subtract(edt1).ToString().Replace('-', ' ');
I created a time calculator so someone can enter a start time in a textbox and an end time in another textbox in 24 hour time format and it will calculate the difference and show it in a label.
How can I make my code do the same thing but with a loop? I'm just looking to make the code shorter instead of having a block of code for each day of the week, shown below is just the Monday and Tuesday code.
//Monday
TimeSpan Mon1In, Mon1Out;
if (!TimeSpan.TryParse(TextBoxInMon1.Text, out Mon1In))
Mon1In = default(TimeSpan);
if (!TimeSpan.TryParse(TextBoxOutMon1.Text, out Mon1Out))
Mon1Out = default(TimeSpan);
MonLabel1.Text = (Mon1Out - Mon1In).TotalHours.ToString("f2");
//Tuesday
TimeSpan Tues1In, Tues1Out;
if (!TimeSpan.TryParse(TextBoxInTues1.Text, out Tues1In))
Tues1In = default(TimeSpan);
if (!TimeSpan.TryParse(TextBoxOutTues1.Text, out Tues1Out))
Tues1Out = default(TimeSpan);
TuesLabel1.Text = (Tues1Out - Tues1In).TotalHours.ToString("f2");
You can just make a function. This is called refactoring.
private void GetTimeValues(TextBox txtIn, TextBox txtOut,
out TimeSpan inTime, out Timespan outTime)
{
if (!TimeSpan.TryParse(txtIn.Text, out inTime))
inTime = default(TimeSpan);
if (!TimeSpan.TryParse(txtOut.Text, out outTime))
outTime = default(TimeSpan);
}
Then call the function and set your label.
TimeSpan Mon1In, Mon1Out;
GetTimeValues(TextBoxInMon1, TextBoxOutMon1, out Mon1In, out Mon1Out);
MonLabel1.Text = (Mon1Out - Mon1In).TotalHours.ToString("f2");
You should probably use a more descriptive function name, this was just the first thing I thought of.
You could also include the label logic inside the function as well, just thread the information along in the same fashion.
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'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