is there a function that would do this
DateTime1.minute=50
if i add 10 minutes it would add 1 hour and set minute to 0 and likewise
There's the AddMinutes function.
As Darin Dimitrov mentions, there is an AddMinutes function.
However, be aware that you can't just do:
dateTime1.AddMinutes(50);
AddMinutes returns a new DateTime, so you'll need to do:
dateTime1 = dateTime1.AddMinutes(50);
You can add a TimeSpan via .Add()
DateTime now = DateTime.Now;
TimeSpan tenMinutes = new TimeSpan(0, 10, 0);
now = now.Add(tenMinutes);
You can also AddDays(int days), AddHours(int hours), AddMinutes(int minutes),AddSeconds(int seconds), etc.
All of these functions return DateTime objects so you'll have to set the value equal to the return value of the method.
DateTime now = DateTime.Now;
now = now.AddMinutes(10);
If I understand your question, you can use the AddMinutes method if you just want to add minutes...
http://msdn.microsoft.com/en-us/library/system.datetime.addminutes.aspx
Or a shorter code example
DateTime dt = DateTime.AddMinutes(50);
// some other logic here
dt.AddMinutes(10);
That should initially set it to 50mins and then adding another 10mins would make it an hour. You may want to consider using a TimeSpan instead though.
TimeSpan span = TimeSpan.FromMinutes(50);
span += TimeSpan.FromMinutes(10);
Console.WriteLine(span.Hours); // prints "1"
Related
Let's say I have
int seconds = 43200;
(amount of seconds from the beginning of the current day, 00:00:00) and I want to get related DateTime representation ("12:00:00"). Is there any c# utility function?
You need the TimeSpan, then you can get the DateTime in this way:
TimeSpan timeOfDay = TimeSpan.FromSeconds( seconds );
DateTime dt = DateTime.Today.Add( timeOfDay );
It is not a DateTime representation, it looks like a TimeSpan representation to me instead.
For this, you can use TimeSpan.FromSeconds method like;
int seconds = 43200;
var ts = TimeSpan.FromSeconds(seconds);
If you really need to add this to generate current day midday, you can use DateTime.Today property and add this to that.
DateTime dt = DateTime.Today.Add(ts);
You can calculate it directly:
int seconds = 43200;
DateTime dateTime = DateTime.Today.AddSeconds(seconds);
I want to convert a Timespan to Datetime. How can I do this?
I found one method on Google:
DateTime dt;
TimeSpan ts="XXX";
//We can covnert 'ts' to 'dt' like this:
dt= Convert.ToDateTime(ts.ToString());
Is there any other way to do this?
It is not very logical to convert TimeSpan to DateTime. Try to understand what leppie said above. TimeSpan is a duration say 6 Days 5 Hours 40 minutes. It is not a Date. If I say 6 Days; Can you deduce a Date from it? The answer is NO unless you have a REFERENCE Date.
So if you want to convert TimeSpan to DateTime you need a reference date. 6 Days & 5 Hours from when? So you can write something like this:
DateTime dt = new DateTime(2012, 01, 01);
TimeSpan ts = new TimeSpan(1, 0, 0, 0, 0);
dt = dt + ts;
While the selected answer is strictly correct, I believe I understand what the OP is trying to get at here as I had a similar issue.
I had a TimeSpan which I wished to display in a grid control (as just hh:mm) but the grid didn't appear to understand TimeSpan, only DateTime . The OP has a similar scenario where only the TimeSpan is the relevant part but didn't consider the necessity of adding the DateTime reference point.
So, as indicated above, I simply added DateTime.MinValue (though any date will do) which is subsequently ignored by the grid when it renders the timespan as a time portion of the resulting date.
TimeSpan can be added to a fresh DateTime to achieve this.
TimeSpan ts="XXX";
DateTime dt = new DateTime() + ts;
But as mentioned before, it is not strictly logical without a valid start date. I have encountered
a use-case where i required only the time aspect. will work fine as long as the logic is correct.
You need a reference date for this to be useful.
An example from
http://msdn.microsoft.com/en-us/library/system.datetime.add.aspx
// Calculate what day of the week is 36 days from this instant.
System.DateTime today = System.DateTime.Now;
System.TimeSpan duration = new System.TimeSpan(36, 0, 0, 0);
System.DateTime answer = today.Add(duration);
System.Console.WriteLine("{0:dddd}", answer);
Worked for me.
var StartTime = new DateTime(item.StartTime.Ticks);
If you only need to show time value in a datagrid or label similar, best way is convert directly time in datetime datatype.
SELECT CONVERT(datetime,myTimeField) as myTimeField FROM Table1
You could also use DateTime.FromFileTime(finishTime) where finishTme is a long containing the ticks of a time. Or FromFileTimeUtc.
An easy method, use ticks:
new DateTime((DateTime.Now - DateTime.Now.AddHours(-1.55)).Ticks).ToString("HH:mm:ss:fff")
This function will give you a date (Without Day / Month / Year)
A problem with all of the above is that the conversion returns the incorrect number of days as specified in the TimeSpan.
Using the above, the below returns 3 and not 2.
Ideas on how to preserve the 2 days in the TimeSpan arguments and return them as the DateTime day?
public void should_return_totaldays()
{
_ts = new TimeSpan(2, 1, 30, 10);
var format = "dd";
var returnedVal = _ts.ToString(format);
Assert.That(returnedVal, Is.EqualTo("2")); //returns 3 not 2
}
First, convert the timespan to a string, then to DateTime, then back to a string:
Convert.ToDateTime(timespan.SelectedTime.ToString()).ToShortTimeString();
I'm new in C# and I need to understand how create a DateTime object that equal the (DateTime.NOW + 1 hour).
Thanks
Generally speaking, you can Add a TimeSpan value that represents any arbitrary interval to a DateTime. There are helper methods on TimeSpan that help you construct such values, for example:
DateTime.Now.Add(TimeSpan.FromHours(1))
Apart from that, since you only want the simple "+1 hour" you can also use AddHours:
DateTime.Now.AddHours(1)
Try this:
var inOneHour = DateTime.Now.AddHours(1);
DateTime newTime = DateTime.Now.AddHours(1);
You need to use the AddHours function;
DateTime oneHourInTheFuture = DateTime.Now.AddHours(1);
if you are looking to Nullable the DataTime object you could also do something like this
DateTime? newTimeHour;
newTimeHour = new DateTime();
newTimeHour = DateTime.Now.AddHours(1);
I want to add seconds (00:00:02) or minutes (00:00:20) on datetime value (may be stored string type) but how? Examples:
13:30+02:02:02= 15:32:02 ,
13:30+00:00:01= 13:30:01 ,
13:30+00:01:00=13:31:00 or 13:30 (not important)
Can you help me? I need your cool algorithm :) Thanks again...
myDateTimeVariable.Add(new TimeSpan(2,2,2));
If you choose to use the TimeSpan, be aware about the Days part:
TimeSpan t1 = TimeSpan.Parse("23:30");
TimeSpan t2 = TimeSpan.Parse("00:40:00");
TimeSpan t3 = t1.Add(t2);
Console.WriteLine(t3); // 1.00:10:00
With DateTime:
DateTime d1 = DateTime.Parse("23:30");
DateTime d2 = DateTime.Parse("00:40:00");
DateTime d3 = d1.Add(d2.TimeOfDay);
Console.WriteLine(d3.TimeOfDay); // 00:10:00
Adding two datetimes from strings:
var result = DateTime.Parse(firstDate) + DateTime.Parse(secondDate);
Adding a string time to a datetime:
var result = existingDateTime.Add(TimeSpan.Parse(stringTime);
Adding time as in your example:
var result = TimeSpan.Parse("12:30:22") + TimeSpan.Parse("11:20:22");
Finally, your example as dates (not tested!):
var result = DateTime.Parse("12:30:22") + DateTime.Parse("11:20:22");
Note that this is sloppy coding, but you get the idea. You need to verify somehow that the string is actually parseable.
Not really sure what you're after, but can you not just use the built in functions to C#'s DateTime object?
DateTime myDate = DateTime.Now;
myDate = myDate.AddHours(1);
myDate = myDate.AddMinutes(30);
myDate = myDate.AddSeconds(45);
The problem is more abstract. As already mentioned, in .NET there are two types - DateTime and TimeSpan. The DateTime type represents a specific point in time. It's not an interval of time. It's a specific location in all time since the birth of the Universe. Even if you set the year/month/day components to 0, it will still represent some absolute point in time. Not a length of time.
The TimeSpan on the other hand represents some interval. 1 minute, 2 days, whatever. It's not specified WHEN, just HOW LONG.
So if you were to subtract two DateTime objects you would get a TimeSpan object that specifies how much time there is between them. And if you add a TimeSpan to a DateTime you get another DateTime. But you can't add a DateTime to another DateTime - that would make no sense.
It sounds to me like you should be working with TimeSpans all the time, because you are dealing with lengths of time, not absolute points in time. If you get these lengths from your source as a DateTime then that's actually not correct, and you should convert them to TimeSpans somehow. The parsing method is one way that has been suggested, but you might also try to subtract zero DateTime from it. That might be faster and more culture-independant.
use the TimeSpan structure. you can add TimeSpans together, or you can add a TimeSpan to a DateTime to produce a new DateTime.
You should have a look at TimeSpan.Parse. This converts a string to a TimeSpan object. That way you can do stuff like
TimeSpan a = TimeSpan.Parse(timeStringA)+TimeSpan.Parse(TimeStringB);
To split a string like "00:00:20+00:01:00" look at string.split
stringA = timeSting.split('+')[0];
stringb = timeSting.split('+')[1];
return string.Format("{0}:{1}:{2}", mytimespan.Hours
+ (mytimespan.Days*24),mytimespan.Minutes,mytimespan.Seconds);
static void Main(string[] args)
{
String timeText = "3/23/2015 12:00:13 AM";
String timeText2 = "3/23/2015 1:45:03 AM";
DateTime time = Convert.ToDateTime(timeText);
string temp = time.ToString("HH:mm:ss");
DateTime time2 = Convert.ToDateTime(timeText2);
string temp2 = time2.ToString("HH:mm:ss");
TimeSpan t1 = TimeSpan.Parse(temp);
TimeSpan t2 = TimeSpan.Parse(temp2);
Console.Out.WriteLine(t1 + t2); // 01:45:16
Console.ReadLine();
}
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.