It is 8:30 and I am trying to find out how many seconds there are between now and the next whole hour (9:00). I think I just want to DateTime.Now.AddHours(1) but after I do that I think I need the "floor". How to get that value?
Thanks.
Just round the time of day in hours up to the next integral value:
var timeOfDay = DateTime.Now.TimeOfDay;
var nextFullHour = TimeSpan.FromHours(Math.Ceiling(timeOfDay.TotalHours));
var delta = (nextFullHour - timeOfDay).TotalSeconds;
//Completely misread. Completely re-writing
I woudl just do something Like this
int minutesToNextHour = 60 - DateTime.Now.Minutes;
int secondsToNextHour = minutesToNextHour * 60;
You don't have to mess around with ceilings and floors. The DateTime.Hour property represents whole hours (it is an integer beteen 0 and 23) of the time of the day represented by the DateTime. You can use this and the DateTime.Date property to strip the components of the DateTime you don't want (sub-hour data) and then just subtract as necessary to produce a TimeSpan.
var now = DateTime.Now;
var timeToNextHour = now.Date.AddHours(now.Hour + 1) - now;
You can of course extract the TotalSeconds component of the resulting TimeSpan if you want the result in seconds.
This seems to be the most simple:
3600 - DateTime.Now.TimeOfDay.TotalSeconds % 3600
(if you want it in whole numbers - integer - then prefix DateTime.Now... with (int).
So you'd need to subtract the 'remainder' minutes, find the difference, and multiply that by 60, right?
How about this:
var currentTime = DateTime.Now;
var hour = currentTime.AddHours(1).Hour;
var newTime = Convert.ToDateTime(hour + ":00");
var timespan = newTime.Subtract(currentTime);
var secondsDiff = timespan.TotalSeconds;
TimeSpan sec = new TimeSpan(0, 0, 3600 - (DateTime.Now.Minute * 60));
How about:
var now = DateTime.Now;
int secondsTillNextHour = (60 - now.Minute)*60+(60-now.Second);
Or (maybe clearer):
int SecondsTillNextHour = 3600 - 60*now.Minute - now.Second;
A more readable version:
public double SecondsToNextHour()
{
return SecondsToNextHour( DateTime.Now );
}
public double SecondsToNextHour( DateTime moment )
{
DateTime currentHour = new DateTime( moment.Year, moment.Month, moment.Day, moment.Hour, 0, 0 );
DateTime nextHour = currentHour.AddHours( 1 );
TimeSpan duration = nextHour - moment;
return duration.TotalSeconds;
}
TimeSpan result = (new DateTime(DateTime.Now.Year, DateTime.Now.Month,
DateTime.Now.Day, DateTime.Now.Hour + 1, 0, 0)).Subtract(DateTime.Now);
Basically here you are building a new DateTime that is one hour on from Now, with no minutes or seconds, then you subtract Now from this and have your result.
I would Timespan.Parse 08:30, add 1 hr to the object, then retrieve the hour part and build a new string with :00 as the minutes and reparse the new string. There may be a more efficient way to do this, but I find this technique clear to read.
Related
I am trying to create script that checks is the current time passed, but getting some errors.
DateTime currentTime = DateTime.Now;
TimeSpan pauseMin = TimeSpan.FromMinutes(1);
TimeSpan compare = currentTime + pauseMin;
if (currentTime >= compare)
return null;
I would write this as
DateTime currentTime = DateTime.Now;
TimeSpan pauseMin = TimeSpan.FromMinutes(1);
DateTime compare = currentTime.Add(pauseMin);
if (currentTime >= compare) {
return null;
}
This uses the type of object that you are trying to represent with everything. DateTime's can have Timespan's added to them: https://msdn.microsoft.com/en-us/library/system.datetime.add%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396
Or Istern's answer if you are always just adding an integer of minutes to the time.
You can't compare DateTime and TimeSpan.
Try
var compare = currentTime.AddMinutes(1)
If you need to somehow use TimeSpan, use Jamie F's answer.
DateTime and TimeSpan is different. You can use currentTime like this:
TimeSpan currentTime = TimeSpan.FromTicks(DateTime.Now.Ticks);
And you can get passed minutes like this:
double minutes = (compare - currentTime).TotalMinutes;
If you just want to pause for 1 minute, you can use
System.Threading.Thread.Sleep(1000 * 60); // 1 minute = 60000 milliseconds
If you want your function to run for 1 minute, you can use something like
var returnAt = DateTime.Now().AddMinutes(1);
while ( true )
{
// your code here ?
if ( DateTime.Now() >= returnAt ) return null;
}
I am converting minutes into hours. So if I have minutes = 12534. The result should be 208:54. The below code fails to bring this result.
TimeSpan spWorkMin = TimeSpan.FromMinutes(12534);
string workHours = spWorkMin.ToString(#"hh\:mm");
Console.WriteLine(workHours);
The result is 16:54.
How to get it correct?
var totalMinutes = 12534;
Console.WriteLine("{0:00}:{1:00}", totalMinutes / 60, totalMinutes % 60);
Or
var totalMinutes = 12534;
var time = TimeSpan.FromMinutes(totalMinutes);
Console.WriteLine("{0:00}:{1:00}", (int)time.TotalHours, time.Minutes);
See https://dotnetfiddle.net/gYEsj2 to play with this
The correct way to use is not using the ToString overload of DateTime – because there is no possibility to show the TotalHours there – but the string.Format method:
string.Format("{0:00}:{1:00}", (int)spWorkMin.TotalHours, spWorkMin.Minutes);
You need use TimeSpan.TotalHours Property
The TotalHours property represents whole and fractional hours, whereas the Hours property represents whole hours.
TimeSpan spWorkMin = TimeSpan.FromMinutes(12534);
string workHours = spWorkMin.ToString(#"hh\:mm");
Console.WriteLine(spWorkMin.TotalHours);
https://dotnetfiddle.net/JRCLra
The format specifier hh will show the hour part, which is not the total hours. You have to manually create a string using TotalHours cast into ints to show it as you want and add the minutes to that.
TimeSpan spWorkMin = TimeSpan.FromMinutes(12534);
string workHours = string.Format("{0}:{1}", (int)spWorkMin.TotalHours, spWorkMin.Minutes);
Console.WriteLine(workHours);
From MSDN documentation:
The "hh" custom format specifier outputs the value of the TimeSpan::Hours property, which represents the number of whole hours in the time interval that is not counted as part of its day component.
One quick way of getting the result you want would be something like the following:
TimeSpan spWorkMin = TimeSpan.FromMinutes(12534);
string workHours = string.Format("{0}:{1:00}", (int)spWorkMin.TotalHours, spWorkMin.Minutes);
Console.WriteLine(workHours);
Personnaly I use this:
public static double MinutsTohHours(int Minuti)
{
double Tempo = 0;
Tempo = ((double)(Minuti % 60) / 100);
var n = (double)Minuti / 60;
return Math.Floor((double)Minuti / 60) + Tempo;
}
using System;
var days = 1;
var hours = 23; //max 23
var min = 12; //max 59
var TotalMin = (days*24*60)+(hours*60)+min;
Console.WriteLine("TotalMins "+ TotalMin);
//return back to the original days,hours,minutes
var Days = (TotalMin/(24*60));
var _minutes = (TotalMin%(60*60));
var Hours = (_minutes/60);
var Minutes = _minutes - (Hours*60);
Console.WriteLine($"{Days} , {Hours} , {Minutes}");
How do I get the time difference between two DateTime objects using C#?
The following example demonstrates how to do this:
DateTime a = new DateTime(2010, 05, 12, 13, 15, 00);
DateTime b = new DateTime(2010, 05, 12, 13, 45, 00);
Console.WriteLine(b.Subtract(a).TotalMinutes);
When executed this prints "30" since there is a 30 minute difference between the date/times.
The result of DateTime.Subtract(DateTime x) is a TimeSpan Object which gives other useful properties.
You want the TimeSpan struct:
TimeSpan diff = dateTime1 - dateTime2;
A TimeSpan object represents a time interval (duration of time or elapsed time) that is measured as a positive or negative number of days, hours, minutes, seconds, and fractions of a second. The TimeSpan structure can also be used to represent the time of day, but only if the time is unrelated to a particular date.
There are various methods for getting the days, hours, minutes, seconds and milliseconds back from this structure.
If you are just interested in the difference then:
TimeSpan diff = (dateTime1 - dateTime2)).Duration();
will give you the positive difference between the times regardless of the order.
If you have just got the time component but the times could be split by midnight then you need to add 24 hours to the span to get the actual difference:
TimeSpan diff = dateTime1 - dateTime2;
if (diff < 0)
{
diff = diff + TimeSpan.FromDays(1);
}
What you need is to use the DateTime classs Subtract method, which returns a TimeSpan.
var dateOne = DateTime.Now;
var dateTwo = DateTime.Now.AddMinutes(-5);
var diff = dateTwo.Subtract(dateOne);
var res = String.Format("{0}:{1}:{2}", diff.Hours,diff.Minutes,diff.Seconds));
The way I usually do it is subtracting the two DateTime and this gets me a TimeSpan that will tell me the diff.
Here's an example:
DateTime start = DateTime.Now;
// Do some work
TimeSpan timeDiff = DateTime.Now - start;
timeDiff.TotalMilliseconds;
IF they are both UTC date-time values you can do TimeSpan diff = dateTime1 - dateTime2;
Otherwise your chance of getting the correct answer in every single possible case is zero.
var startDate = new DateTime(2007, 3, 24);
var endDate = new DateTime(2009, 6, 26);
var dateDiff = endDate.Subtract(startDate);
var date = string.Format("{0} years {1} months {2} days", (int)dateDiff.TotalDays / 365,
(int)(dateDiff.TotalDays % 365) / 30, (int)(dateDiff.TotalDays % 365) / 30);
Console.WriteLine(date);
private void button1_Click(object sender, EventArgs e)
{
TimeSpan timespan;
timespan = dateTimePicker2.Value - dateTimePicker1.Value;
int timeDifference = timespan.Days;
MessageBox.Show(timeDifference.ToString());
}
You can use in following manner to achieve difference between two Datetime Object. Suppose there are DateTime objects dt1 and dt2 then the code.
TimeSpan diff = dt2.Subtract(dt1);
You need to use a TimeSpan. Here is some sample code:
TimeSpan sincelast = TimeSpan.FromTicks(DateTime.Now.Ticks - LastUpdate.Ticks);
How can I find difference between two time intervals.
Like 13:45:26.836 - 14:24:18.473 which is of the format "Hour:Min:Sec:Millisecs". Now i need to find the time difference between these two times.
How can i do this in C#.?
Thanks in advance.
Basically, what you need to do is put those time values into DateTime structures. Once you have your two DateTime variables, just subtract them from one another - the result is a variable of type TimeSpan:
DateTime dt1 = new DateTime(2010, 5, 7, 13, 45, 26, 836);
DateTime dt2 = new DateTime(2010, 5, 7, 14, 24, 18, 473);
TimeSpan result = dt2 - dt1;
string result2 = result.ToString();
TimeSpan has a ton of properties that get sets - the difference in all sorts of units, e.g. milliseconds, seconds, minutes etc. You can also just do a .ToString() on it to get a string representation of the result. In result2, you'll get something like this:
00:38:51.6370000
Is that what you're looking for?
i'm posting an example;
you can check it and adapt your program,
/* Read the initial time. */
DateTime startTime = DateTime.Now;
Console.WriteLine(startTime);
/* Do something that takes up some time. For example sleep for 1.7 seconds. */
Thread.Sleep(1700);
/* Read the end time. */
DateTime stopTime = DateTime.Now;
Console.WriteLine(stopTime);
/* Compute the duration between the initial and the end time.
* Print out the number of elapsed hours, minutes, seconds and milliseconds. */
TimeSpan duration = stopTime - startTime;
Console.WriteLine("hours:" + duration.Hours);
Console.WriteLine("minutes:" + duration.Minutes);
Console.WriteLine("seconds:" + duration.Seconds);
Console.WriteLine("milliseconds:" + duration.Milliseconds);
Find the number of seconds; subtract both numbers and then you can figure out the time difference. Depending on the programming language you use, I am positive their must be a library that can handle it.
//Start off with a string
string time1s = "13:45:26.836";
string time2s = "14:24:18.473";
TimeSpan interval = DateTime.Parse(time2s) - DateTime.Parse(time1s);
This will produce a result of:
Days 0 int Hours 0 int
Milliseconds 637 int
Minutes 38 int Seconds 51 int
Ticks 23316370000 long
TotalDays 0.02698653935185185 double
TotalHours 0.64767694444444446 double
TotalMilliseconds 2331637.0 double
TotalMinutes 38.860616666666665 double
TotalSeconds 2331.6369999999997 double
in my application
Ex 1: Start time 12.30
(-)End time 16.00 here i get the value as 3.7 but i need to show this 3.7 as 3.5 in my application
Ex 2: Start time 12.00
(-)End time 16.00 here i get the value as 4.0 here there is no need to alter the value
(1.7,2.7,3.7,4.7,.... etc ) as to be represented as(1.5,2.5,3.5,4.5,.. etc )
so how to write an function for this where if the vale contains(1.7,2.7) i should change to 1.5,2.5
or if it contains 1.0,2.0 then there is no need to replace any value?
This extension method ought to do the job:
public decimal RoundToNearestHalf(this decimal value)
{
return Math.Round(value * 2) / 2;
}
var num1 = (3.7).RoundToNearestHalf(); // 3.5
var num1 = (4.0).RoundToNearestHalf(); // 4.0
I've used the decimal type in the code because it seems you want to maintain base 10 precision. If you don't, then float/double would do just as well, of course.
Use the DateTime type. Subtracting DateTime types returns a TimeSpan. Use TimeSpan.TotalHours to get your result. E.g.:-
var x = DateTime.Parse("12:30");
var y = DateTime.Parse("16:00");
Console.WriteLine((y - x).TotalHours);
Use DateTime type to work with time. Example:
string time1 = "12:30";
string time2 = "16:00";
TimeSpan diff = DateTime.Parse(time2)-DateTime.Parse(time2);
string diffString = diff.ToString("hh:mm"); // will be 03:30
Multiply hours with 60 and add minutes. You'll get total number of minutes.
12hours and 30 minutes = 720 + 30 = 750 minutes.
16 hours = 960 minutes.
Subtract the first value from the other and divide it by 60
(960 - 750) / 60 = 210 / 60 = 3.5
You should use TimeSpan and round it off:
TimeSpan startTime = new TimeSpan(12, 30, 0);
TimeSpan endTime = new TimeSpan(16, 0, 0);
TimeSpan span = endTime - startTime;
double totalHours = span.TotalHours;
double roundedToHalf = Math.Round(totalHours * 2) / 2;
Console.WriteLine(roundedToHalf);
UPDATE:
If the start and end time are from different dates, you should use DateTime for startTime and endTime.
If the values in your question represent times you can't do decimal arithmetic with them and expect time values as results.
You need to manipulate the values as times
I don't know C#, but it must have some time functions.
Have the times as DateTime then use Timspan to find the difference between the two times?
Times are not integers or floats. You can't work with them as if they are - you wouldn't try to do integer math using the String class, would you?
DateTime and TimeSpan are you friends for this kind of data manipulation.
You can use the C# Floor and Ceil method of the Math Class. Read more about it in the below URLs:
http://msdn.microsoft.com/en-us/library/system.math.ceiling(VS.71).aspx
http://dotnetperls.com/math-floor
string i = "2.0";
if (i == "2.3" || i == "3.3" || i == "4.3")
{
string strReplace = i.Replace(".3", ".5");
}
else
{
string strReplace = i;
}