Convert DateTime to TimeSpan

Question

I want to convert a DateTime instance into a TimeSpan instance  is it possible    I ve looked around but I couldn t find what I want  I only find time difference  More specifically  I want to convert a DateTime instance into milliseconds  to then save it into an IsolatedStorage

User · Answer

You can just use the TimeOfDay property of date time, which is TimeSpan type:

DateTime.TimeOfDay

This property has been around since .NET 1.1

More information: http://msdn.microsoft.com/en-us/library/system.datetime.timeofday(v=vs.110).aspx

User · Answer

To convert a DateTime to a TimeSpan you should choose a base date time - e g  midnight of January 1st  2000  and subtract it from your DateTime value  and add it when you want to convert back to DateTime    If you simply want to convert a DateTime to a number you can use the Ticks property

User · Answer

Try the following code    TimeSpan CurrentTime   DateTime Now TimeOfDay    Get the time of the day and assign it to TimeSpan variable

User · Answer

TimeSpan FromTicks DateTime Now Ticks

User · Answer

In case you are using WPF and Xceed s TimePicker  which seems to be using DateTime   as a timespan picker -as I do right now- you can get the total milliseconds  or a TimeSpan  out of it like so   var milliseconds   DateTimeToTimeSpan timePicker Value  TotalMilliseconds       TimeSpan DateTimeToTimeSpan DateTime  ts                if   ts HasValue  return TimeSpan Zero          else return new TimeSpan 0  ts Value Hour  ts Value Minute  ts Value Second  ts Value Millisecond           XAML     lt Xceed TimePicker x Name  timePicker  Format  Custom  FormatString  H h  m m  s s     gt    If not  I guess you could just adjust my DateTimeToTimeSpan   so that it also takes  days  into account or do sth like dateTime Substract DateTime MinValue  TotalMilliseconds

[c#] Convert DateTime to TimeSpan

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