[FIXED] How to Convert DateTime.Now in 0 to 1 decimal format in c#

Issue

I would like to convert the current time to a decimal representing a fraction of the day. For example, if the day starts at 0, then 12:00 PM should be 0.5.

I need to send that value to an API, and it needs to be in that format. i.e.

"LAST_PRINT_TIME":0.22020833"

Solution

Depending on the precision requirements of your result, this may help you:

DateTime now = DateTime.Now;
double dayFraction = (now.Hour + now.Minute / 60d) / 24d;

now.Minute / 60d calculates the fraction of the current hour (so if the time is XX:15 PM this will give 0.25). This is then added to the current hour. This value is then divided by 24 to obtain the final result.

For example, 3:45 PM would go as follows: (15 + 45 / 60) / 24) => (15 + 0.75) / 24 => 15.75 / 24 => 0.65625

So 3:45 PM, which is 15.75 hours into the day, would be 0.65625 (or 65.625%) of the day.

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Or, as @madreflection mentioned in a comment, you could use .ToOADate() as well. In this case, you could do something like:

DateTime now = DateTime.Now;
double dayFraction = now.ToOADate() - now.Date.ToOADate();

Answered By - elmer007

Answer Checked By - Robin (PHPFixing Admin)