C what is the easiest way to subtract time

Question

I m trying to put together a tool that will help me make work schedules   What is the easiest way to solve the following   8 00am   5 hours   1 00pm  and  5 00pm - 2 hours   3 00pm  and  5 30pm -  45   4 45  and so on

User · Answer

try this  namespace dateandtime        class DatesTime                public static DateTime Substract DateTime now  int hours int minutes int seconds                        TimeSpan T1   new TimeSpan hours  minutes  seconds               return now Subtract T1                       static void Main string   args                        Console WriteLine Substract DateTime Now  36  0  0  ToString

User · Answer

Hi if you are going to subtract only Integer value from DateTime then you have to write code like this  DateTime Now AddHours -2    Here I am subtracting 2 hours from the current date and time

User · Answer

This works too   System DateTime dTime   DateTime Now        tSpan is 0 days  1 hours  30 minutes and 0 second  System TimeSpan tSpan   new System TimeSpan 0  1  3  0     System DateTime result   dTime   tSpan    To subtract a year   DateTime DateEnd   DateTime Now  DateTime DateStart   DateEnd - new TimeSpan 365  0  0  0

User · Answer

Check out all the DateTime methods here  http   msdn microsoft com en-us library system datetime aspx     Add  Returns a new DateTime that adds the value of the specified TimeSpan to the value of this instance       AddDays  Returns a new DateTime that adds the specified number of days to the value of this instance           AddHours Returns a new DateTime that adds the specified number of hours to the value of this instance          AddMilliseconds  Returns a new DateTime that adds the specified number of milliseconds to the value of this instance           AddMinutes   Returns a new DateTime that adds the specified number of minutes to the value of this instance       AddMonths    Returns a new DateTime that adds the specified number of months to the value of this instance       AddSeconds   Returns a new DateTime that adds the specified number of seconds to the value of this instance        AddTicks Returns a new DateTime that adds the specified number of ticks to the value of this instance       AddYears Returns a new DateTime that adds the specified number of years to the value of this instance

User · Answer

Use the TimeSpan object to capture your initial time element and use the methods such as AddHours or AddMinutes  To substract 3 hours  you will do AddHours -3   To substract 45 mins  you will do AddMinutes -45

User · Answer

These can all be done with DateTime Add TimeSpan  since it supports positive and negative timespans   DateTime original   new DateTime year  month  day  8  0  0   DateTime updated   original Add new TimeSpan 5 0 0     DateTime original   new DateTime year  month  day  17  0  0   DateTime updated   original Add new TimeSpan -2 0 0     DateTime original   new DateTime year  month  day  17  30  0   DateTime updated   original Add new TimeSpan 0 45 0      Or you can also use the DateTime Subtract TimeSpan  method analogously

[c#] C#: what is the easiest way to subtract time?

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