I have a day (of week) represented as a number from 0 to 6 (mon-sun). I have an hour represented as a number from 0 to 23. I have a minute represented as a number from 0 to 59. Finally, I have a duration representing the number of minutes an event lasts.
I want to add the duration to a the day, hour, minutes so that I yield an ending day, hour, and minute.
I am constructing a arbitrary date like this...
DateTime dt = new DateTime(2010, 1, 1, se.Hour, se.Minute, 0);
dt.AddMinutes(se.Duration);
...then pulling off the day (calculated by subtracting the new day from 1 as formed in the arbitrary date... this is safe because the allowable duration can not be more than one week in minutes), hours and minutes after the addition. However, adding a value of say 720 minutes does not change the DateTime dt. This seems so simple but it's not working. Thoughts?
1 answers
The problem is that, when you're adding the duration, you're not then reassigning the result to the variable dt (or some other variable). So you want:
Instances of the DateTime struct are immutable and so, when you add a duration to one, it produces a new instance - it doesn't change the old one.
See this recent thread for further details.
answered 5 months ago by:
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