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I need to write a program that calculates the addition of two times in C# Example: time1 = 04:21:57 time2= 01:54:26 result = 06:16:23 . I'm still not very familiar with the language and I'm stuck like glue on this problem unable to find a solution. I would appreciate your help.
Use TimeSpan.Add Method (TimeSpan)
TimeSpan time1 = TimeSpan.Parse("04:21:57");
TimeSpan time2 = TimeSpan.Parse("01:54:26");
TimeSpan result = time1.Add(time2);
Console.WriteLine(result);
It appears that what you call "time" is actually a time span, i.e. the difference between two absolute times.
If this is correct, .NET offers a good data type to deal with the problem: it's called TimeSpan. You can perform parsing and addition like this:
var a = TimeSpan.Parse("01:54:26");
var b = TimeSpan.Parse("06:16:23");
var c = a + b;
Console.WriteLine(c);
Demo.
Note that the result may exceed 24 hours, in which case the sum would be expressed in days, hours, minutes, and seconds.
I will not give you the code, I'll just give you the idea:
Since you haven't provided enough information, I'm gonna assume that time1 and time2 are strings. You need to split them with a delimeter ":", then you first need to add seconds, and you'll calculate the module of the given sum by 60 (e.g. if you get 72, module is 12, so that'll be your result) and also division of that sum with 60 (you'll get either 1 or 0, do integer division).
You will add this to the sum of minutes as the transfer. Do the same thing for the sum of minutes, module by 60, that's the minutes, divide by 60 and add to the sum of hours.
First, try to define a class "Time", who have some data int value (hours, minutes, sec) and define some basics private method (like increase hours when you have 60 min, and set to 0 min, same fonction for secunds)
Now, in your program main, define two time objectif, and with the method you've developed, you'll have an output.
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Closed 5 years ago.
Here's what I tried so far:
var value = DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds.ToString()
It gives me the answer below but I would like to get a whole number:
"1500092088.9501"
Below are a few examples of various ways you can deal with this sort of scenario
double secondsSince1970 = DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalSeconds;
// int logic. ints are whole numbers so casting to an int will drop all decimals with no rounding.
Console.WriteLine(((long)secondsSince1970).ToString());
// Math logic. .Net gives us some handy Maths to work with rounding decimals
// Round up
Console.WriteLine(Math.Ceiling(secondsSince1970).ToString());
// Round down
Console.WriteLine(Math.Floor(secondsSince1970).ToString());
// Round nearest
Console.WriteLine(Math.Round(secondsSince1970).ToString());
EDIT: Changed the int logic to cast to a long instead of an int because the int.MaxValue will be reached near the start of the year 2038
I would just use DateTimeOffset to get the seconds count:
long secsSinceEpoch = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
This seems to be what you're looking for though, of course, you'd probably want to call ToString() on that if you want it as an actual string:
var secsSinceEpoch = DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString();
I thought it worth mentioning - If you want the number of seconds from the start of the epoch time, which is 1/1/1970, You don't need to do subtraction... You just need to get the current datetime and do the conversion to seconds.
Joe_DM provides a good answer to your rounding problem.
(Would leave as comment, but still a little short on rep :) )
I have to calculate number of days difference between today and SubmittedDate, but if I the SubmittedDate = today
my Result = 0,430090... Instead of 1
here is my code:
DaysDiff = (today.Subtract(DataUtilities.GetSafeDateTime(financialStatement[SharePoint_Assessment_Fields.SUBMITTEDDATE_FIELD]))).TotalDays,
could you please help me ?
The TotalDays property is a double. It also takes the hours and minutes in account, so that might cause the subtraction of two days get fractions too.
If you want to round that, you could use Math.Round, Math.Ceiling or Math.Floor depending on your needs. Taking your expected outcome, I guess you need to use Ceiling:
double ceiledDays = Math.Ceiling(ts.TotalDays);
Or you could get the Date part of the two dates and calculate with that.
I am extremely confused with this stopWatch.Elapsed property. It shows the time value in this format
I want to know what should I add in the end of this output. Is it ms (01:20:17.0550410ms) or just s (01:20:17.0550410s)?
And further more if I want to take only the msportion of this output and do some calculation with it which value should I take, is it .0550410 or 55.041? My questions might sound silly but I'm really confused!
please help.
The unit shown is "fractional parts of a second", to the 7th decimal place - i.e. to the 10-millionth of a second.
Since a millisecond is 0.001 seconds, your number of milliseconds is 55.041.
Now, as everyone else said, use stopWatch.Elapsed.TotalMilliseconds (to get all of the milliseconds) or stopWatch.Elapsed.Milliseconds (to get all of the milliseconds less than 1 second).
I am extremely confused with this stopWatch.Elapsed property. It shows the time value in this format
I'll begin at the beginning, just to make sure everything is understood.
Microsoft .Net framework designers have decided that all variables that store information derive from either a Class or a Struct(ture). Both of these base types have some defaults methods. One of these Methods for a ValueType (which I'll discuss below) is .ToString(). When you call the ToString() method on a Windows Runtime structure, it provides the default behavior for value types that don’t override ToString().
I will assuming you are talking about the System.Diagnostics.Stopwatch class. The documentation states:
A Stopwatch instance can measure elapsed time for one interval, or the total of elapsed time across multiple intervals. In a typical Stopwatch scenario, you call the Start method, then eventually call the Stop method, and then you check elapsed time using the Elapsed property.
Before we begin looking at the Properties of the Stopwatch, we need to understand that in order for the Stopwatch to work, there needs to be a way to store a Magnitude of Time (information). A Magnitude of Time in this case a numerical representation of the difference between two points in time; in this case the when the Stopwatch Starts and when the Stopwatch Ends. Microsoft .Net has created a structure called TimeSpan to store this value.
Taking a look at the documentation for the property Stopwatch.Elapsed it is of the type TimeSpan.
Since your screenshot appears to be in a console application, I'll assume the code (which should always be provided but isn't) is the following:
Console.Writeline("Took Time: " + stopWatch.Elapsed.ToString());
This code converts the TimeSpan into a string using the TimeSpan's .ToString() override:
So not passing a value to .ToString() is a null value which defaults to ("c") It's in the TimeSpan Format Strings:
So using your example:
01:20:17.0550410s
It should be obvious that 01 is hours, 20 is minutes, 17 is seconds and .0550410 are tenths of seconds (decisecond). Adding any string values at the end will most likely make no sense because all the numbers are of different time durations. The only way I think it would make sense if you wanted be more specific is to change it to:
01h 20m 17.0550410s
or
01h 20m 17s 055.0410ms
According to the documentation for TimeSpan:
A TimeSpan value can be represented as [-]d.hh:mm:ss.ff, where [...] ss is seconds, and ff is fractions of a second
So in your case, it is 17.0550410 seconds.
Elasped is a TimeSpan, what you're showing is the representation from writing it to the console (Same as calling .ToString() on any non string object), that representation is in hours:minutes:seconds.fraction of second. If you want to show this in a specific amount there are properties for this on the TimeSpan so instead of doing
Console.WriteLine(stopWatch.Elapsed);
You can do
Console.WriteLine(stopWatch.Elapsed.TotalMilliseconds);
A full example to clarify
Console.WriteLine(
"The timer ran for " + stopWatch.Elapsed.Hours + " Hours, "
+ stopWatch.Elapsed.Minutes + " Minutes and "
+ stopWatch.Elapsed.Seconds + ". this amounts to a total of "
+ stopWatch.Elapsed.TotalMilliseconds + " ms" );
It looks like you are just using the default .ToString() method of the Stopwatch.Elapsed property, which actually is a TimeSpan object. You can absolutely control the string formatting of this TimeSpan, as well as use numeric components of it for mathematical operations (rounding, adding, etc.). Please read this: Stopwatch.Elapsed Property
A quick search of 'c# stopwatch' returns the MSDN documentation showing that Stopwatch.Elapsed is a TimeSpan. Then a search on 'c# TimeSpan' returns the MSDN documentation showing that TimeSpan.ToString() returns a string with the following format: [-][d.]hh:mm:ss[.fffffff]. And that's just using google. Next time try doing some research before asking your question.
Assuming that you are interested in StopWatch.Elapsed, then...
In situations like this I find the documentation is often quite helpful.
It states that StopWatch.Elapsed returns
A read-only TimeSpan representing the total elapsed time measured by the current instance.
The documentation for TimeSpan states its many available properties, one of which is Milliseconds and another is TotalMilliseconds. According to the docs:
Milliseconds - Gets the milliseconds component of the time interval represented by the current TimeSpan structure.
whereas
TotalMilliseconds - Gets the value of the current TimeSpan structure expressed in whole and fractional milliseconds.
Other properties allow you to check Days, Hours, Minutes, Seconds etc. Please use the documentation as it saves everyone a lot of time and effort.
I'm looking for a way to format time duration originally expressed in hours (as a 'double' variable) for an ASP.NET web app written in C#. I need a short version that has only 2 significant values. For instance:
1h:20m
2d:20h
2mo:12d
5y:2mo
I searched and it seems like C# does not have a built-in function for what I need.
So I decided to write my own but I'm stumped with correct formatting of all the parts. For instance, I may get a string, such as "1d:24h", or for a simple 2 months, I may get "1mo:29d"
PS. The problem I've encountered is in defining how many days are in a month and in a year.
DateTime's are renowned for being an annoying task.
As there is no indication as to which months you are referring to, with the given information this would be impossible. Months can have 28, 29, 30 and 31 days depending on what month/year you are taking into consideration..
Without an indication as to which months you are dealing with, the flip from 1 to 2 months would be a random guess as to which day you make the transition. You will either have to add in more incoming parameters to account for this, or explain to the user that a month is considered x days and only x days.
Another thing to consider would be daylight savings. 1pm + 24 hours may not be 1pm the next day. In such circumstances with you or the end user may wish to consider such days 23h=1d or 25h=1d.
Delphi:
SecondsBetween(StrToDateTime('16/02/2009 11:25:34 p.m.'), StrToDateTime('1/01/2005 12:00:00 a.m.'));
130289133
C#:
TimeSpan span = DateTime.Parse("16/02/2009 11:25:34 p.m.").Subtract(DateTime.Parse("1/01/2005 12:00:00 a.m."));
130289134
It's not consistent either. Some dates will add up the same, ie..
TimeSpan span = DateTime.Parse("16/11/2011 11:25:43 p.m.").Subtract(DateTime.Parse("1/01/2005 12:00:00 a.m."));
SecondsBetween(StrToDateTime('16/11/2011 11:25:43 p.m.'), StrToDateTime('1/01/2005 12:00:00 a.m.'));
both give
216905143
The total amount of seconds is actually being used to encode data, and I'm trying to port the application to C#, so even one second completely throws everything off.
Can anybody explain the disparity? And is there a way to get c# to match delphi?
Edit: In response to suggestions that it might be leap second related: Both date ranges contain the same amount of leap seconds (2), so you would expect a mismatch for both. But instead we're seeing inconsistency
16/02/2009 - 1/01/2005 = Delphi and C# calculate a different total seconds
16/11/2011 - 1/01/2005 = They calculate the same total seconds
The issue it seems related to this QC 59310, the bug was fixed in Delphi XE.
One will likely deal with Leap Seconds. However, .NET does not as far as I'm aware.
You don't mention how you convert the c# TimeSpan into a number. The TotalSeconds property is a floating point value - perhaps it's a rounding problem in the double to int conversion?