C# Calculate how long it will be until specified timespan-CodePudding

So I am trying to calculate how long it will be until a specific time. ButI cant seem to get it working.

An example is say im trying to calculate how long it will be from now to 06:00:00am So say it is 10:30pm I want to see how long it will be until til 6am the next day. So the correct answer would be 7 hours and 30 mins. Or another example say it is 8:30pm I want to see how long it will be until 10pm. If anyone could provide me with some code to help it would be greatly appreciated!

CodePudding user response：

Compare the timespan first then add one day if needed.

        static TimeSpan TimeDiff(TimeSpan nowSpan, TimeSpan ts)
        {
            if (nowSpan > ts)
            {
                ts = ts.Add(TimeSpan.FromDays(1));
            }
            return ts - nowSpan;
        }

        static void Main(string[] args)
        {
            Console.WriteLine(TimeDiff(new TimeSpan(22, 30, 0), new TimeSpan(6, 0, 0)));
            //  07:30:00
            Console.WriteLine(TimeDiff(new TimeSpan(20, 30, 0), new TimeSpan(22, 0, 0)));
            //  01:30:00
            // You may want use DateTime.Now.TimeOfDay as the first parameter
            Console.ReadKey();
        }

CodePudding user response：

Try this

DateTime later = DateTime.Now.AddHours(3);
DateTime now = DateTime.Now;
Console.WriteLine(later.Subtract(now).TotalSeconds);