How to check if DateTime.Now is between two given DateTimes for time part only?

Question

For my app I need to know if Now() is between two values.

The user can set a start- and an end-time so he will not disturbed by a notification (during the night for example).

So if have got two TimePickers (start- and end-time) that the user can set.

Lets say the user sets 22:00 for the StartTime and 07:00 for the EndTime (this would cover the night).

How can I check if the DateTime.Now is between the selected Start and End time?

EDIT: I only want this to work with the Hour and minutes part. So if the user sets the Start and End time this should work for every night.

Answer 1

First you need to convert everything to the same units (we'll use TimeSpan), then you need to see whether the start-end times cross midnight, and finally do your comparison based on the results of that check:

// convert everything to TimeSpan TimeSpan start = new TimeSpan(22, 0, 0); TimeSpan end = new TimeSpan(07, 0, 0); TimeSpan now = DateTime.Now.TimeOfDay; // see if start comes before end if (start < end)     return start <= now && now <= end; // start is after end, so do the inverse comparison return !(end < now && now < start); 

Here's a function to do it for you:

bool TimeBetween(DateTime datetime, TimeSpan start, TimeSpan end) {     // convert datetime to a TimeSpan     TimeSpan now = datetime.TimeOfDay;     // see if start comes before end     if (start < end)         return start <= now && now <= end;     // start is after end, so do the inverse comparison     return !(end < now && now < start); } 

You would call it like:

bool silenceAlarm = TimeBetween(DateTime.Now, StartTime.Value, EndTime.Value);