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Add time duration to date using addHours() in c#

I want to add time duration to my datetime variable. I am reading the duration from a csv file. The format of duration is 0:29:40 or 1:29:40. When i add this to datetime variable it gives exception of incorrect format. How can I add the duration using this format. Previously I had duration as a simple integer like "6" or "7" but now the format is this "0:29:40" I don't know how to change my code to accommodate this format.
Previously i was doing this
double hours = Convert.ToDouble(row.Cells[2].Value.ToString());
DateTime newdate = finaldate.AddHours(hours);
row.Cells[2].Value.ToString() reads the value from csv
Any help is appreciated, Thanks

You don't need to parse to a double. Parse to a TimeSpan. Something like:
var source = "0:29:40";
var ts = TimeSpan.Parse(source);
Now ts is your time span. And the nice thing with TimeSpan is you can just add it to a DateTime:
DateTime newdate = finaldate + ts;

You are going to need to use the TimeSpan.Parse() or TimeSpan.ParseExact() method to properly parse your string and then simply add that TimeSpan result to your existing date:
var time = TimeSpan.Parse(row.Cells[2].Value.ToString());
DateTime newDate = finalDate.Add(time);
If you need to explicitly specify what each of the values of your time represent, then the TimeSpan.ParseExact() method will allow you to provide a formatting string to specify this:
// This will assume that 1:29:40 is hours, minutes, and seconds
var time = TimeSpan.ParseExact(row.Cells[2].Value.ToString(), #"h\:m\:s", null);

how to get AM/PM from datetime? c#

I have a date like this:
equipBooking.BookedFromDteTme.Date = `{12/5/2013 12:00:00 AM}`
and I want to apply time like this, but I do not know how to get AM and PM from the end.
dtStartTimeHour.SelectedItem = equipBooking.BookedFromDteTme.TimeOfDay.Hours;
dtStartTimeMin.SelectedItem = equipBooking.BookedFromDteTme.TimeOfDay.Minutes;
**dtStartTimeAMPM.SelectedItem = equipBooking.BookedFromDteTme.???????.;**
Please help me.
I have tried something like this:
var startDatestr = equipBooking.BookedFromDteTme.TimeFrom.Split(new string[] { ":", ":",":",":" }, StringSplitOptions.RemoveEmptyEntries);
AM/PM = startDatestr[3]

If you just want the string you can do:
equipBooking.BookedFromDteTme.ToString("tt");
Or for a boolean result use:
bool isPM = (equipBooking.BookedFromDteTme.Hour >= 12);
BTW, you don't need to call TimeOfDay - you can get the Hour and Minute property directly from the DateTime:
dtStartTimeHour.SelectedItem = equipBooking.BookedFromDteTme.Hour;
dtStartTimeMin.SelectedItem = equipBooking.BookedFromDteTme.Minute;
dtStartTimeAMPM.SelectedItem = equipBooking.BookedFromDteTme.ToString("tt");

TimeSpan does not store time-of-day, but rather the length of any interval of time. It has no notion of AM/PM.
TimeOfDay returns the amount of time since midnight.
If Hours is more than or equal to 12, that will be PM.

try using dateTime.ToString("tt");

How to set current time to a value

I was just wondering if there is a way to get the current time and set it into a value.
If its 12:06 AM.. I want to get that time and set it into currentTime.
Example
float currentTime = 0;
currentTime = 12.06;

As others have mentioned, the DateTime class would be ideal for this, and to work out the difference between 2 date/times:
DateTime end = DateTime.Now;
DateTime start = new DateTime(2011, 12, 5, 12, 6,0);
double hours = (end - start).TotalHours;
The subtraction of DateTime objects results in a TimeSpan object that you can use to see the hours/minutes etc.

try DateTime class
DateTime dt = DateTime.Now;

Is this what you're looking for?
DateTime currentTime;
currentTime = DateTime.Now;

Don't use floats or strings. You can do all kinds of cool things using DateTime.
Here's how you'd get the hours that someone worked:
var clockIn = new DateTime(2011,12,4,9,0,0); // December 4th, 9 AM
var clockOut = new DateTime(2011,12,4,17,0,0); // December 4th, 5 PM
var duration = clockOut - clockIn; // TimeSpan
Console.Write(duration.TotalHours); // 8

A few people have mentioned how, but as a 'better' recommendation you should use
DateTime currentTime = DateTime.UtcNow
Otherwise you have issues when the clocks go back, if your timing code is run on those days. (plus it is far easier to alter the UTC time to local time than it is to convert a '1am' to UTC (as there will be two of them when the clocks go back)

Well if you really what it as a float then try:
var currentDate = DateTime.Now;
float currentTime = float.Parse((currentDate.Hour > 12 ? currentDate.Hour -12 :
currentDate.Hour) + "." + currentDate.Minute);
I wouldn't recommend comparing dates or time with floats. A better options would be to use timespans.

You should be using a Timespan instance for time related values, you can use the flexibility to get the required values like
TimeSpan ts = DateTime.Now.TimeOfDay;
ts.ToString("hh:mm") // this could be what you are looking for
You could then use ts.TotalHours which would give you fractional hours (as a double) else you could construct a string specifically using ts.Hours ..ts.Minutes play around and it could be prove useful.

Try the following:
DateTime StartTime=StartTime value;
DateTime CurrentTime=DateTime.Now;
TimeSpan dt = CurrentTime.Subtract(StartTime);
In dt you will get a working time period.

If you want to have the difference between two times, then do this:
DateTime dateOne = DateTime.Parse(enteredTime);
DateTime dateTwo = DateTime.Now;
TimeSpan difference = dateOne - dateTwo;

Join Date and Time to DateTime in C#

I am retrieving data from an iSeries where there is a separate date and time fields. I want to join them into a DateTime field in my C# project. I don't see a way to add just a time to a DateTime field. How would you suggest accomplishing this?

You can do this quite easily:
DateTime dateOnly;
DateTime timeOnly;
...
DateTime combined = dateOnly.Date.Add(timeOnly.TimeOfDay);
TimeOfDay returns a TimeSpan, which you then add to the date.
Edit (thanks to commenters below) - to be safe, use dateOnly.Date to ensure the date part only.

How are they being stored? Assuming that the date portion is being stored as a DateTime of midnight of the day in question and the time is a TimeSpan, you can just add them.
DateTime date = ...;
TimeSpan time = ...;
DateTime result = date + time;

You could easily construct a TimeSpan from your "time" field.
Once you have that, just do:
TimeSpan time = GetTimeFieldData();
dateField = dateField.Add(time);

Datetime date = new DateTime(Date1.Year, Date1.Month, Date1.Day, Time1.Hour, Time1.Minute, Time1.Second);

You can add a TimeSpan to a DateTime and write something like this.
// inside consuming function
ISeriesObject obj = getMyObject();
DateTime dt = getDate(obj) + getTime(obj);
private DateTime getDate(ISeriesObject obj)
{
//return a DateTime
}
private TimeSpan getTime(ISeriesObject obj)
{
//return a TimeSpan
}

My answer addresses joining two objects of DateOnly and TimeOnly in .NET 6:
DateOnly orderDate = ...
TimeOnly orderTime = ...
DateTime orderDateTime = orderDate.ToDateTime(orderTime);

This should do:
var output = date.Date + time.TimeOfDay;
or
var output = new DateTime(date.Year, date.Month, date.Day,
time.Hour, time.Minute, time.Second);
suppose that both variable date and time are both of Type DateTime

Note that adding the time to the date is not your biggest problem here. As #Reed Copsey mentioned, you just create a DateTime from the date and then .Add the time.
However, you need to make sure that the iSeries date and time (a Unix time most probably) are in the same representation as the .Net representation. Thus, you most probably need to convert it by adding it to a Jan 1, 1970 DateTime as well.

Cant you simply format the date part and time part as separate strings, then join them together? Then you can parse the string back to a DateTime object

C# Getting Just Date From Timestamp

If I have a timestamp in the form: yyyy-mm-dd hh:mm:ss:mmm
How can I just extract the date from the timestamp?
For instance, if a timestamp reads: "2010-05-18 08:36:52:236" what is the best way to just get 2010-05-18 from it.
What I'm trying to do is isolate the date portion of the timestamp, define a custom time for it to create a new time stamp. Is there a more efficient way to define the time of the timestamp without first taking out the date, and then adding a new time?

DateTime.Parse("2010-05-18 08:36:52:236").ToString("yyyy-MM-dd");

You should use the DateTime type:
DateTime original = DateTime.Parse(str);
DateTime modified = original.Date + new TimeSpan(13, 15, 00);
string str = modified.ToString("yyyy-MM-dd HH:mm:ss:fff");
Your format is non-standard, so you'll need to call ParseExact instead of Parse:
DateTime original = DateTime.ParseExact(str, "yyyy-MM-dd HH:mm:ss:fff", CultureInfo.InvariantCulture);

You could use substring:
"2010-05-18 08:36:52:236".Substring(0, 10);
Or use ParseExact:
DateTime.ParseExact("2010-05-18 08:36:52:236",
"yyyy-MM-dd HH:mm:ss:fff",
CultureInfo.InvariantCulture)
.ToString("yyyy-MM-dd");

DateTime date;
if (DateTime.TryParse(dateString, out date))
{
date = date.Date; // Get's the date-only component.
// Do something cool.
}
else
{
// Flip out because you didn't get a real date.
}

Get the .Date member on the DateTime
DateTime date = DateTime.Now;
DateTime midnightDate = date.Date;

use it like this:
var x = DateTime.Now.Date; //will give you midnight today
x.AddDays(1).AddTicks(-1); //use these method calls to modify the date to whats needed.

The best (and fastest) way to do this is to convert the date to an integer as the time part is stored in the decimal part.
Try this:
select convert(datetime,convert(int, #yourdate))
So you convert it to an integer and then back to a data and voila, time part is gone.
Of course subtracting this result from the original value will give you the time part only.