how to Convert DateTime Now To second

Question

input 15:20:30

to to convert to second

Answer 1

var dt = DateTime.Now;
var ticks = dt.Ticks;
var seconds = ticks/10000000;

Each tick is 100 nanoseconds.

Answer 2

Seeing as though you haven't specified the question properly I have interpreted it to represent 15 hours 20 minutes and 30 seconds, as opposed to DateTime.Now. (Obviously this is the same as "How many seconds since midnight")

  TimeSpan MySpan = new TimeSpan(15, 20, 30);
  MySpan.TotalSeconds;

Although if you're only wanting the Seconds from the current DateTime.Now (this is not the TotalSeconds, just the current minutes seconds), just use:

  DateTime.Now.Second

Answer 3

Not sure what you really want, but if you want to compute the number of seconds from 15 hours, 20 minutes and 30 seconds you can do this:

Int32 GetSeconds(Int32 hours, Int32 minutes, Int32 seconds) {
  return ((hours*60) + minutes)*60 + seconds;
}