I asked a question like this earlier and got a great answer but I made a mistake and wanted the output to be a decimal rather than a time. So here's the question.
I have two textboxes that allow a user to enter a start time and an end time in this format (h:mm). I want it to return the difference in a label. For example, if a user enters 1:35 in the first textbox and 3:30 in the second textbox and press the 'Calculate' button, it will return the decimal 1.92.
Any ideas or resources for this? I only want to calculate decimal difference of the time entered, date and seconds doesn't matter at all. Below is the code for getting an output in the format of (h:mm).
TimeSpan ts1 = TimeSpan.Parse(textBox1.Text); //"1:35"
TimeSpan ts2 = TimeSpan.Parse(textBox2.Text); //"3:30"
label.Text = (ts2 - ts1).ToString(); //"1:55:00"
It sounds like you want the total number of hours, in that 1.92 hours is 115 minutes (ish).
In that case you want:
double hours = (ts2 - ts1).TotalHours;
... you can then format that how you wish (e.g. to 2 decimal places).
For example:
TimeSpan ts1 = TimeSpan.Parse("1:35");
TimeSpan ts2 = TimeSpan.Parse("3:30");
double hours = (ts2 - ts1).TotalHours;
Console.WriteLine(hours.ToString("f2")); // Prints 1.92
Of course I'd personally use Noda Time and parse the strings as LocalTime values instead of TimeSpan values, given that that's what they're meant to be (times of day), but that's a minor quibble ;)
(ts2 - ts1).TotalHours.ToString();
Related
I am working on a timesheet program in C# where the user selects hours worked for a day from a combobox drop down list for each day the work. The dropdown options are in 15 minute increments ( :15, :30, :45, 1:00, 1:15 and so on). So on Monday, the user could select 5:30 (meaning he/she worked 5 hours and 30 minutes, not the time 5:30). On Tuesday, the user could select 6:45 and so on for the week.
The Selected Item is for the total hours and minutes worked that day, not an interval of time or a specific point in time, but the total hours and minutes worked for the day.
How can I add the hours and minutes selected each day together to get a grand total for the week?
It is my understanding, the items in a combobox are strings, so I tried to convert the strings to DateTime, but that didn't work. I tried converting the string to a decimal and then to DateTime, but I was unable to do that either.
How do I take those hours/minutes worked each day, and get a total for the week?
Help!? I am losing my mind on this one!! :)
I tried to convert the strings to DateTime, but that didn't work.
Convert strings to integers, which represent minutes. Construct TimeSpan objects from these integers, passing the integer for the middle parameter.
Add TimeSpan objects together using operator +. The result will give you the total time, expressed as a span of time, from which you can query hours, minutes, and even days, if necessary.
Sometimes this may be a workaround for the current situation, anyway keep it as a suggestion;
Let timeList be the list of string that you are getting as inputs(please use 0:15 for 15 minutes).
List<string> timeList = new List<string>();
timeList.Add("0:15");
timeList.Add("2:00");
timeList.Add("1:00");
timeList.Add("2:15");
timeList.Add("3:15");
timeList.Add("4:15");
Then you can process the result by using the following code:
TimeSpan totalTime = new TimeSpan(0, (int)timeList.Sum(x => getMinutes(x)), 0);
Where the getMinutes()method is defined like the following:
public static double getMinutes(string timeIn)
{
string[] components = timeIn.Split(':');
TimeSpan ts = new TimeSpan(int.Parse(components[0]), int.Parse(components[1]), 0);
return ts.TotalMinutes;
}
Working Example
The combobox item should be a TimeSpan which can be added together.
I have a Timespan that is always in milliseconds, but I need to show the date in minutes and seconds only so that it's always "mm:ss". Even if there are hours in the timespan, the output string should contain only minutes and seconds.
For example, if there is a timespan of 02:40:30, it should get converted to 160:30.
Is there a way to achieve this?
Reed's answer is ALMOST correct, but not quite. For example, if timespan is 00:01:59, Reed's solution outputs "2:59" due to rounding by the F0 numeric format. Here's the correct implementation:
string output = string.Format("{0}:{1:00}",
(int)timespan.TotalMinutes, // <== Note the casting to int.
timespan.Seconds);
In C# 6, you can use string interpolation to reduce code:
var output = $"{(int)timespan.TotalMinutes}:{timespan.Seconds:00}";
You can format this yourself using the standard numeric format strings:
string output = string.Format("{0}:{1}", (int)timespan.TotalMinutes, timespan.Seconds);
I do it this way
timespan.ToString("mm\\:ss");
That is a pretty basic math problem.
Divide by 1000 to get total number of seconds.
Divide by 60 to get number of minutes.
Total seconds - (minutes * 60) = remaining seconds.
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 have 1 single text box which a user will enter the number of hours. At present, if they enter 26 hours, we get an error because of the TimeSpan's HH limit. This value is going to get stored in a SQL Server 2008 Time(7) field.
How can I get it to recognize more than 23 hours? It is not an option to store it as a decimal because another section of the program requires this field to be a time(7) field.
TimeSpan estiamtedHours;
private void btnSave_Click(object sender, EventArgs e)
{
estimatedHours = TimeSpan.Parse(tbEstHours.Text);
}
The time(7) field also has the limit of 24 hours, what would be the best way round this as Time(7) is required for a Stopwatch on another form.
Thanks
If you know the input value is an hour value as a floating point number, you can use TimeSpan.FromHours():
TimeSpan estiamtedHours;
private void btnSave_Click(object sender, EventArgs e)
{
estimatedHours = TimeSpan.FromHours(Double.Parse(tbEstHours.Text));
}
Parse the text into an int and pass that int as the hours parameter in the TimeSpan constructor.
int hours;
if (Int32.TryParse(tbEstHours.Text, out hours))
{
TimeSpan ts = new TimeSpan(hours, 0, 0);
}
You can also do the same with minutes and seconds. Alternatively, if you just want hours, you can use TimeSpan.FromHours in the same manner instead of the TimeSpan constructor.
Be careful. TimeSpan is meant to measure an elapsed duration of time, while time in SQL Server is specifically a time-of-day. These are two different concepts.
Sometimes these get mixed up. For example, DateTime.TimeOfDay is a TimeSpan type - which goes against its design. It's a reasonable compromise since there is no Time type in .Net and it can fit.
But a TimeSpan that is 24 hours or greater will not fit into a SQL Server time field.
Also, a TimeSpan is based on standard days. You can create one with TimeSpan.FromHours(26) and it will represent "1 day and 2 hours". If you call TimeSpan.FromHours(26).ToString() it will be "1.02:00:00".
If you're storing an elapsed duration of time (not a time of day), then use a TimeSpan in .Net, but use an integer type in SQL Server. Decide what units you want precision for, and that will help you choose a data type.
For example, you can store the full precision of TimeSpan.Ticks using a SQL Server bigint type. But probably you will store TimeSpan.TotalSeconds using an int. When loading, you can use TimeSpan.FromSeconds to get back to a TimeSpan type.
Also be aware that a TimeSpan can be negative, which represents moving backwards in time.
By the way, if you used the Noda Time library - these concepts would be separated for you in types called Duration and LocalTime.
If what you were after is a way to parse a string like "26:00:00" you can't do that with a TimeSpan. But you can use Noda Time:
// starting from this string
string s = "26:00:00";
// Parse as a Duration using the Noda Time Pattern API
DurationPattern pattern = DurationPattern.CreateWithInvariantCulture("H:mm:ss");
Duration d = pattern.Parse(s).Value;
Debug.WriteLine(pattern.Format(d)); // 26:00:00
// if you want a TimeSpan, you can still get one.
TimeSpan ts = d.ToTimeSpan();
Debug.WriteLine(ts); // 1.02:00:00
After parsing the input, use the FromHours method:
double hours
if (double.TryParse(tbEstHours.Text, out hours)
{
TimeSpan time = TimeSpan.FromHours(hours);
}
The TimeSpan.Parse Method expects the input in the format
[ws][-]{ d | [d.]hh:mm[:ss[.ff]] }[ws]
where hh is the hour part, ranging from 0 to 23.
For example,
TimeSpan.Parse("5") returns 5 days,
TimeSpan.Parse("5:14") returns 5 hours and 14 minutes.
If you just want your users to enter a number of hours, you can simply parse the input as an integer and construct a TimeSpan from that:
TimeSpan result = TimeSpan.FromHours(int.Parse("26"));
// result == {1.02:00:00}
(Use int.TryParse for user input.)
If you want your users to enter both hours and minutes (such as 26:14), then you need to implement some parsing method yourself.
Since the other answers don't address this
The concern here is the time column in the database and it expects a valid duration which would be limited to the 24 hr time where as TimeSpan can have them beyond the 24 hr limit.
So you should ideally parse the value as int (use int.Parse or int.TryParse) and then check if it is less than 24 and then create the appropriate TimeSpan
Out Time :
2013-03-08 15:00:00.000
In Time :
2013-03-08 11:21:03.290
I need to get Hours and Minutes separately for same date from above, when (Out Time - In Time).
How can I do that ?
I think you probably just want:
TimeSpan difference = outTime - inTime;
int hours = (int) difference.TotalHours;
int minutes = difference.Minutes;
Note that Minutes will give you "just the minutes (never more than 59)" whereas TotalHours (truncated towards zero) will give you "the total number of hours" which might be more than 23 if the times are more than a day apart.
You should also consider what you want to do if the values are negative - either consider it, or explicitly rule it out by validating against it.
The Subtract method on the DateTime class will allow you subtract that date from the other date.
It will give you a TimeSpan which will be the difference.
I'll leave it to you to work out the actual code.
http://msdn.microsoft.com/en-GB/library/8ysw4sby.aspx
You can use Hours property and Minutes
link : http://msdn.microsoft.com/en-us/library/system.datetime.hour.aspx