I am developing a C#(WinForm) application with the goal of recording the service time of a task, and would like the help of you to solve this case.
I need to register two different times, in two different variables (Both have to be current computer schedules), because I will have a start and end time. So I need to calculate this time between the schedules and turn the result into minutes and display it in a TextBox.
I also need to have a total value in minutes and convert this value to time in "hours: minutes".
The code I have is the one below. If anyone can help me, thank you!
private void GetHoras()
{
DateTime total = DateTime.Now;
string totalTime;
totalTime = total.ToShortTimeString();
txtTempo.Text = totalTime;
}
What you're looking for is the TimeSpan struct.
If you subtract one DateTime from another, you'll get a TimeSpan result automatically.
It has members that can give you total minutes or seconds or hours, etc., or the individual parts.
You can use Substract function:
DateTime date1 = DateTime.Now.AddHours(-2).AddMinutes(-25);
DateTime date2 = DateTime.Now;
TimeSpan interval = date2.Subtract(date1);
int hoursDiff = interval.Hours;
int minutesDiff = interval.Minutes;
double minutesTotal = interval.TotalMinutes;
double totalMins = dateTime1.Subtract(dateTime2).TotalMinutes
Works for Me with a double value of total minutes as result.
Related
Could you please help me? I'm trying to create an attendance system wherein the undertime and overtime will be automatically computed, but there's an error. For example the employee's scheduled out is 11 PM, and their overtime 12 AM which is 1 hour, but the output is 23. Can anyone help me how to compute elapsed time?
string datetime = "12:00 AM"; // this is the time you are going to time out
string OUT = "11:00 PM"; // this is your scheduled out
DateTime d1 = Convert.ToDateTime(datetime);
DateTime d2 = Convert.ToDateTime(OUT);
TimeSpan ts = d2.Subtract(d1);
MessageBox.Show(ts.TotalHours.ToString()); // output is 23 which is wrong, it must be 1 hour overtime only
IMO, in order to fix your problem, you have to work with the actual datetime objects.
Always record actual system datetime without manipulating parts of it.
For your case you should have the fields for record scheduled_work_start, scheduled_work_finished and actual_work_finished
for an instance, say one of the employees starts work at 10-01-2019 14:00:00 (2 PM) and finishes her time at 10-01-2019 23:00:00 (11 PM) and assume she did one hour overtime.
The system should record the actual_work_finished time as 11-01-2019 00:00:00 (12 AM)
When you require to calculate or find out the extra time
calculate:
var over_time_in_hours =
actual_work_finished.Substract(scheduled_work_finished).TotalHours;
Hope this makes sense.
If you print your d1 and d2 times:
d1 time => "09.01.2019 00:00:00".
d2 time => "09.01.2019 23:00:00".
Then 23-0 = 23 is the expected result.
By the way you can achieve your result by adding 1 day to d1 time object and subtract this result from d2 object:
TimeSpan ts = d1.AddDays(1).Subtract(d2);
Console.WriteLine(ts.TotalHours.ToString());
Let's start by naming your variables something that helps us to reason about the code.
// this is the time you are going to time out
DateTime actual = Convert.ToDateTime("12:00 AM");
// this is your scheduled out
DateTime scheduled = Convert.ToDateTime("11:00 PM");
TimeSpan overtime = scheduled.Subtract(actual);
What we find is that you're performing the wrong calculation to start with. This would be the correct calculation:
TimeSpan overtime = actual.Subtract(scheduled);
When we do that though we are now getting -23 hours. This is because your actual time isn't after your scheduled time. For that you need to add a day.
Try this:
// this is the time you are going to time out
DateTime actual = Convert.ToDateTime("12:00 AM").AddDays(1);
// this is your scheduled out
DateTime scheduled = Convert.ToDateTime("11:00 PM");
TimeSpan overtime = actual.Subtract(scheduled);
Then you get the result that you want - i.e. 1 hour.
I want to subtract minutes and get the difference. below is my code
double diff = currBlock.EndTime.Subtract(currBlock.StartTime).TotalMinutes;
In given code (currBlock.StartTime = 23:30:00) and (currBlock.EndTime= 00:20:00)
here starttime is time of today i.e.(09/26/2016 23:30:00), night time which will be consider as 11:30 PM and endtime is time of tomorrow i.e.(09/27/2016 00:20:00), morning time which will be consider as 12:20 Am. In my code i am getting values in minus which is -1390 and it is incorrect. So please help me to solve this.
Here i have attach image of data for further reference.
please explain me properly, how do i use it? it is just a time block for different shift so there is no date include in it
There is a date included in it. You're telling us that EndTime is something like 09/27/2016 00:20:00, while StartTime is something like 09/26/2016 23:30:00. The problem is that that knowledge is in your head and not in your code. If you subtract the values as TimeSpans, then you're literally saying: what is 30 minutes minus 23 hours and 30 minutes. The answer, of course is -23 hours. To get the real difference, you must include the dates, which means utilizing a DateTime or DateTimeOffset type for both StartTime and EndTime, so you can encode that whole date and time. Then, when you do the subtraction, it will return the right value.
Below Code works for me. Thanks friends for your support and help.
string strCurrDate = (DateTime.Now.Date + currBlock.EndTime).ToString();
DateTime dtYourDate = DateTime.Parse((DateTime.Now.AddDays(-1).Date + currBlock.StartTime).ToString());
string strYourDate = dtYourDate.ToShortDateString() + " " + dtYourDate.ToLongTimeString();
string strTotalMinsElapsed = TotalMinutesElapsed(dtYourDate).ToString();
private long TotalMinutesElapsed(DateTime dtYourDate)
{
long lTotalMinutesElapsed = 0;
//Find Current Date and Time
DateTime dtCurrent = DateTime.Now;
//Find Time Difference details between current date and your given date
TimeSpan tsDiff = dtCurrent.Subtract(dtYourDate);
//Add Total Minutes for Days difference
lTotalMinutesElapsed = lTotalMinutesElapsed + tsDiff.Days * (24 * 60);
//Add Total Minutes for Hour difference
lTotalMinutesElapsed = lTotalMinutesElapsed + tsDiff.Hours * 60;
//Add Minutes
lTotalMinutesElapsed = lTotalMinutesElapsed + tsDiff.Minutes;
return lTotalMinutesElapsed;
}
I have a variable: string currentTime in the constructor:
currentTime = DateTime.Now.ToString("HH:mm:ss tt");
And in the event Form1_FormClosing i have:
currentTimeClosed = DateTime.Now.ToString("HH:mm:ss tt");
Now i want to calculate the diffrenece between the two strings times and get the time the user used something like currenttimeClosed - currentTime = 10 minutes and 10 seconds
So i know the user used the program 10 minutes and 10 seconds.
How can i do it ?
First off, you don't need to store strings - just store the DateTime directly.
You can subtract the two to get a TimeSpan telling you the difference and output the value of that.
// fields
DateTime currentTime;
DateTime currentTimeClosed;
// Somewhere in constructor
currentTime = DateTime.Now;
// in Form1_FormClosing
currentTimeClosed = DateTime.Now;
var difference = currentTimeClosed - currentTime;
Console.Write(string.Format("{0} minutes and {1} seconds",
(int)difference.TotalMinutes,
difference.Seconds));
Do not store the dates and times as strings. Instead, use the DateTime type:
Declare your variable in the constructor like this:
DateTime currentTime;
Then, you can assign the date and time upon program startup like this:
currentTime = DateTime.Now;
Whenever you need the running time, compute it like this:
TimeSpan runningTime = DateTime.Now - currentTime;
Please refer to the TimeSpan documentation; TimeSpan offers a variety of properties to find out about the amount of time that your program has been running.
Store the values as DateTimes, then make the calculation. This will result in a TimeSpan, which contains the desired result.
I would actually use a StopWatch. Create it and store it in a memeber variable and call the Start() method in your constructor. Then call the Stop() method in Form1_Unload. You can ask it how low the program was used for with Ellapsed or ElapsedMillis.
I'm trying to get the number of days (calculated byu datediff) in sql and the number of days in c# (calculated by DateTime.now.Substract) to be the same, but they return different results....
//returns 0
int reso = DateTime.Now.Subtract(expirationDate).Days;
vs
//returns 1
dateDiff(dd,getDate(),ExpirationDate)
In both cases, ExpirationDate is '10/1/2011 00:00:00', and the code and the DB are sitting on the same server. I want the return int to be the same. I suspect I'm missing something stupid... ideas??
dateDiff(dd,getDate(),ExpirationDate) Is doing a days comparison. DateTime.Now.Subtract(expirationDate).Days is doing a date and time
For example
SELECT dateDiff(dd,'10/1/2011 23:59:00' , '10/2/2011') returns one day even when only one minute apart.
If you want the same in C# you need to remove the time component
e.g.
DateTime dt1 = new DateTime(2011,10,1, 23,59,0);
DateTime dt2 = new DateTime(2011,10,2, 0,0,0);
Console.WriteLine((int) dt2.Subtract(dt1.Subtract(dt1.TimeOfDay)));
So in your case it would be something like
DateTime CurrentDate = DateTime.Now;
int reso = CurrentDate.Subtract(CurrentDate.TimeOfDay).Subtract(DateTime.expirationDate).Days;
I haven't tested it but I would not do
DateTime.Now.Subtract(DateTime.Now.Subtract.TimeOfDay)
Because the second call to Now wouldn't be guaranteeing to be the same as first call to Now
In any case Stealth Rabbi's answer seems more elegant anyway since you're looking for a TimeSpan not a DateTime
10/1/2011 is less than 1 day away from DateTime.Now. Since you're getting back a TimeSpan and then applying Days to it, you're getting back a TimeSpan that is < 1 day. So it'll return 0 Days.
Instead, just use the Date component of those DateTimes and it'll correctly report the number of days apart - like this:
DateTime now = DateTime.Now;
DateTime tomorrow = new DateTime(2011, 10, 1);
var val = (tomorrow.Date - now.Date).Days;
This will yield you 1 day.
I'm assuming you want the number of Total days, not the number of days from the largest previous unit. You'd want to use the TotalDays property. Also, you may find it easier to use the minus operator to do a subtraction
DateTime d1 = DateTime.Now;
DateTime d2 = new DateTime(2009, 1, 2);
TimeSpan difference = d1 - d2;
Console.WriteLine(difference.TotalDays); // Outputs (today):1001.46817997424
How do I read a time value and then insert it into a TimeSpan variables?
If I understand you correctly you're trying to get some user input in the form of "08:00" and want to store the time in a timespan variable?
So.. something like this?
string input = "08:00";
DateTime time;
if (!DateTime.TryParse(input, out time))
{
// invalid input
return;
}
TimeSpan timeSpan = new TimeSpan(time.Hour, time.Minute, time.Second);
From MSDN: A TimeSpan object represents a time interval, or duration of time, measured as a positive or negative number of days, hours, minutes, seconds, and fractions of a second. The largest unit of time used to measure duration is a day.
Here's how you can initialize it to CurrentTime (in ticks):
TimeSpan ts = new TimeSpan(DateTime.Now.Ticks);
TimeSpan span = new TimeSpan(days,hours,minutes,seconds,milliseonds);
Or, if you mean DateTime:
DateTime time = new DateTime(year,month,day,minutes,seconds,milliseconds);
Where all of the parameters are ints.
Perhaps using:
var span = new TimeSpan(hours, minutes, seconds);
If you mean adding two timespans together use:
var newSpan = span.Add(new TimeSpan(hours, minutes, seconds));
For more information see msdn.
You can't change the properties of a TimeSpan. You need to create a new instance and pass the new values there.