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C# date AddDays output

I have following code:
string date = "13.04.2012";
string date2 = (DateTime.Parse(date).AddDays(1)).ToString();
This is working correctly without a problem but after the DateTime.Parse function the variable date2 is '14.04.2012 00:00:00' but i would like to have only the date '14.04.2012' without the timestamp.
I thought about using the substring function like this:
string sub = date2.Substring(0, 10);
That would work like this but isn't there a better way to get that result?

try this
string date = "13.04.2012";
string date2 = (DateTime.Parse(date).AddDays(1)).ToShortDateString();

DateTime.Parse returns a DateTime value, which is not really a string so it's wrong to say that it has the value '14.04.2012 00:00:00'.
What you need to do here is add a format parameter to the ToString call, or use one of the convenience formatting methods.

DateTime.ToString(string format)

Try DateTime.Date property. May be it will be correct for this. See the below code part
DateTime dateOnly = date1.Date;
and out put will be
// 6/1/2008
EDIT:
or simply you can try
DateTime.ToString("dd.MM.yyyy");

I think you are after formatting
System.DateTime now = System.DateTime.Now;
System.DateTime newDate = now.AddDays(36);
System.Console.WriteLine("{0:dd.mm.yyyy}", newDate);

c# converting string into date time

I have string like this "24:00:00" and I would like to convert it to time. I tried convert and DateTime.Parse but it seems like it needs a date too. Is there a way to just get time, or do I have to put in a date as well?

If you are only interested in the time component, consider using TimeSpan instead of the full DateTime.
var time = TimeSpan.Parse("23:59:59");

I am not sure "24:00:00" is going to be a valid time. Any how, you should not need to specify the date, you can do...
DateTime time = DateTime.ParseExact("23:59:59", "HH:mm:ss", null);
If your time is actually a time of the day, then I would suggest sticking with DateTime. If you are actually using an amount of time (i.e. can be more that 23:59:59) then you could use TimeSpan...
TimeSpan time = TimeSpan.ParseExact("23:59:59", "HH:mm:ss", null);
don't forget, both have a TryParseExact version if you are not sure you input will be valid

You can use DateTimeFormatInfo to format your DateTime.
string strDate = "23:10:00";
DateTimeFormatInfo dtfi = new DateTimeFormatInfo();
dtfi.ShortTimePattern = "hh:mm:ss";
dtfi.TimeSeparator = ":";
DateTime objDate = Convert.ToDateTime(strDate, dtfi);
Console.WriteLine(objDate.TimeOfDay.ToString());

I think you need TimeSpan.Parse instead?

You can use timespan
http://msdn.microsoft.com/en-us/library/system.timespan.aspx

How about
var time = new DateTime.Today;
var str = "24:00:00";
var split = str.split(":");
time.AddHours(Convert.ToInt32(split[0]));
time.AddMinutes(Convert.ToInt32(split[1]));
time.AddSeconds(Convert.ToInt32(split[2]));
Hope this helps.

question on DateTime addtime in c#?

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"

How to get the time value from DateTime datatype

I have DateTime variable, and I need to get ONLY the time value from that variable.
How can I do that in C#?
Thanks,

dt.TimeOfDay will return the time as a TimeSpan object.

Check TimeOfDay property of the DateTime object.

You can try this....
someDateTime.ToString("hh:mm:ss");

Alternatively you can also use the string formatting for getting the output nicely
string.Format("{0: hh:mm:ss}", DateTime.Now)

If you need string representation of time you can use:
dt.ToShortTimeString()
dt.ToLongTimeString()

Add or Sum of hours like 13:30+00:00:20=13:30:20 but how?

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();
}