I'm new to C# and i need help on converting 3 int variables into 24 hour format. I look on other Stack Overflow questions but it mostly only convert 1 variable into DateTime meanwhile i need to convert 3 variables into to 24 hour format. Here's what the variable looks like
private int hours = 1;
private int minutes = 1;
private int seconds = 1;
my expected outcome is 01:01:01 but i don't know how to do that.
You can do it like this:
var dt= new DateTime(1, 1, 1, hours, minutes, seconds); // year, month, day, hours, minutes, seconds
If you want to cast to string after that, you can do:
dt.ToString("HH:mm:ss"); // 01:01:01 // 24 hour clock digits
dt.ToString("hh:mm:ss tt"); // 01:01:01 AM // 12 hour clock
I already found a answer that works for me since i can't insert the variables like the previous 2 answers. So i just use
hours.ToString("00")
minutes.ToString("00")
seconds.ToString("00")
this makes it into a string in 2 digit number like my expected outcome.
Related
I take two object from database. One is a filename with date init and second one is a DateTime object like 2021-08-08 17:32:07.880.
First, I converted filename to datetime with the code shown here:
var fileDate = DateTime.ParseExact(filename, "yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);
I have to check that the difference between the first date and the second date is 3 hours 15 min or simply 3 hours.
How do I delete seconds and milliseconds of date 2, and compare them?
I'd go similar to MatJ's recommendation:
You've got your file time, and your DB time, which might have seconds and milliseconds on it. If you do the later one minus the earlier one you get a timespan representing the length of time between the datetimes
dBDate - fileDate
Timespans have a TotalMinutes property that is a decimal. A timespan of 5 minutes 45 seconds would have a TotalMinutes of 5.75
So, if we cast that to an int it cuts off the seconds; simples!
var t = (int)((dBDate - fileDate).TotalMinutes);
Now you can compare your t for equality to 180 (3h) or 195 (3h15h
It is very easy to do !
Try following code :
TimeSpan timeSpan = (firstDate - secondDate)
timeSpan.CompareTo(new TimeSpan(3, 15, 0)) // hrs, mins, seconds
This CompareTo method will return 1 if difference between two times is greater than 3 hrs and 15 mins, otherwise, it will return -1
PS:
firstDate and secondDate are in DateTime
I have this code:
Configurator.DateTimeHumanizeStrategy = new PrecisionDateTimeHumanizeStrategy(.75);
var dateTime1 = DateTime.UtcNow.AddYears(2).AddMonths(-5);
var text1 = dateTime1.Humanize();
In the text1 variable I get "one year from now". But this is not very accurate. Is there any way to get "one year and seven months from now"?
Update 1:
Solution #Daniel Hoffman has some problems, for example if my date is in the past:
//UtcNow is 11.07.2021
var dateTime6 = new DateTime(2021, 4, 24);
TimeSpan dateTimeSpan6 = dateTime6 - DateTime.UtcNow;
var text6 = dateTime6.Humanize();
string textSpan6 = dateTimeSpan6.Humanize(maxUnit: TimeUnit.Year, precision: 2);
then I get "2 months, 11 weeks" which contains basically the same information twice but in different units.
Update 2:
I have fixed the problem with dates in the past, by using Duration() method:
var timeSpan = date - DateTime.UtcNow;
return timeSpan.Duration().Humanize(maxUnit: TimeUnit.Year, precision: 2, minUnit: TimeUnit.Day);
[Edit]: Using TimeSpan will allow you to specify the precision of your period, but you will lose the ability to have "yesterday" or
"tomorrow", and it omits the " ago" or " from now", all of which are
localized.
A partial workaround would be to use the TimeSpan.Humanize
method for TimeSpans less than 366 days and DateTime.Humanize
otherwise. And if it's only going to be used in one language, the user
can append the appropriate text depending on if the timespan is
negative.
You can use the precision parameter with a TimeSpan:
TimeSpan periodFromNow = DateTime.UtcNow.AddYears(2).AddMonths(-5) - DateTime.UtcNow;
Then:
string myPeriodFromNow = periodFromNow.Humanize(maxUnit: TimeUnit.Year, precision: 2);
Other examples:
TimeSpan.FromDays(486).Humanize(maxUnit: TimeUnit.Year, precision: 7) => "1 year, 3 months, 29 days" // One day further is 1 year, 4 month
TimeSpan.FromDays(517).Humanize(maxUnit: TimeUnit.Year, precision: 7) => "1 year, 4 months, 30 days" // This month has 30 days and one day further is 1 year, 5 months
See also: https://github.com/Humanizr/Humanizer#humanize-timespan
It seems like its not currently possible in Humanizer to do what you want.
Check out this method PrecisionHumanize() on line 102, if the amount of days exceeds 365 then only years will be returned. And in general it seems like only one type of length of time can be returned, there is no years and months or minutes and seconds, just the largest one.
But check out another library called NodaTime it might be able to do what you want.
Here is a link to a different question similar to yours.
I am trying to create a time card solution in C# and having an issue with totaling hours worked for a week. From a drop down, the user would select the number of hours they worked in a day (ex. 5:30 - the 5:30 is the total hours worked, not the actual time 5:30). The user would select the hours each work day and the application would then total the hours for the week. The application I have written totals the hours, but I have two issues: if I use .Hours to add the hours up, I run into an issue when the total goes over 24; when I use .TotalHours, it calculates over 24 ok, but somehow it adds an hour randomly when I select :30 increments. Here is the code I have to calculate and display the totals:
using .Hours does not allow the total number of hours to go over 24. Instead it converts the 24 to 1 day and starts the adding the hours again, losing the original 24:
lblWorkgroupOneTotalTime.Text = (totalWeekOneHours.Hours).ToString("00") +
":" + (totalWeekOneHours.Minutes).ToString("00");
//using .TotalHours causes the calculation to randomly add an hour to the total:
lblWorkgroupTwoTotalTime.Text =
(totalWeekTwoHours.TotalHours).ToString("00").TrimStart('0') +
":" + (totalWeekTwoHours.Minutes).ToString("00");
I feel like I am very close to having everything work correctly, but I can't figure this part out.
How about this:
Initialize an example for 30 hours and 30 minutes:
TimeSpan totalWeekThreeHours = new TimeSpan(30, 30, 0);
(Timespan works better than DateTime here I feel.)
Then:
var hours = (int)totalWeekThreeHours.TotalMinutes / 60;
var mins = totalWeekThreeHours.TotalMinutes % 60;
Output:
var example1 = hours + ":" + mins;
var example2 = String.Format("{0} hours {1} mins", hours, mins);
Console.WriteLine("Example 1: " + example1);
Console.WriteLine("Example 2: " + example2);
//Output:
//Example 1: 30:30
//Example2: 30 hours 30 minutes
it adds an hour randomly
Nothing in programming happens "randomly". So when debugging, your first step should always be to look for patterns in your bug. As long as you believe the bug happens "randomly", you will have a mental block getting in the way of finding the bug.
As for your specific issue…
For any of the Total... properties of TimeSpan, this will be a double value that represents the entire time span in the units you're retrieving, including any fractional amounts.
For example, if the TimeSpan value represents 1 hour and 45 minutes, the TotalHours value will be 1.75. At the same time, you are telling the ToString() method that you want the value rounded to the nearest integer value. So, any time that the fractional part of your time span in hours is greater than one-half, the value is rounded up to the next hour value.
If you don't want that behavior, you should just truncate the value yourself before formatting it as a string:
lblWorkgroupTwoTotalTime.Text = string.Format("{0:0}:{1:00}",
(int)totalWeekTwoHours.TotalHours, totalWeekTwoHours.Minutes);
I also don't see why you used the format string "00" only to strip off the leading 0 after the fact. Easier to just not format the string that way in the first place.
Finally, note alternative syntax for formatting strings. Your approach (calling ToString() explicitly) is fine, but I find it wordy. The above is more concise, and does a better job separating the format from the input values.
The problem with displaying TotalHours with a format string of "00" is that it's going to round up. You have a couple of choices if you don't want to show days:
Use Hours + Days * 24 for the hours
Use TotalMinutes / 60 for hours
Convert TotalHours to an int, which will always round down
For example:
var totalHours = (totalWeekOneHours.Days * 24) + totalWeekOneHours.Hours;
// Or:
var totalHours = totalWeekOneHours.TotalMinutes / 60;
// Or:
var totalHours = (int)totalWeekOneHours.TotalHours;
Then you can output it:
lblWorkgroupOneTotalTime.Text = $"{totalHours:00}:{totalWeekOneHours.Minutes:00}";
I'm working on an edit admin form and I'm populating two DropDownLists (hours and mins) from a DB. I need to extract the hours (12 hour format) and minutes from the returned DateTime object in the DB. Here's what I've tried:
DateTime dt = DateTime.Parse(biz.GetStartDateByID(classID).ToString());
int hrs = Convert.ToDateTime(dt.ToString()).Hour;
For "2012-03-08 22:45:00.000" in the DB, this gives "22" for hours. What's the best way of extracting the hours in 12 hour format and the minutes? For example, if the hours value in the DateTime object was "18", I'd need it as "6".
Try this:
String.Format("{0:hh}", dt);
This will give you the hour in 12-hour, zero-padded format.
For no zero-padding:
String.Format("{0:h}", dt);
int hrs24 = dt.Hour;
int hrs12 = hrs24 > 12 ? hrs24 - 12 : (hrs24 == 0 ? 12 : hrs24);
DateTime.Hour % 12
That will give 0-11 of course... do you want 1-12? If so:
((DateTime.Hour + 11) % 12) + 1
I don't think there's anything simpler built in...
you can visit this link also...
http://www.geekzilla.co.uk/View00FF7904-B510-468C-A2C8-F859AA20581F.htm
Just use the proper format for DateTime to string conversion
DateTime dt = DateTime.Parse(biz.GetStartDateByID(classID).ToString());
int hrs = Convert.ToDateTime(dt.ToString("hh:mm:ss")).Hour;
For reference please look at this
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