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

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TimeSpan FromTicks DateTime Now Ticks

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

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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

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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

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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

[c#] Convert DateTime to TimeSpan

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