Question

If I have a date and time in a DateTime object, can I remove say 10 minutes, or 24 hours etc from the date and time using a format string?

So if I have 1/1/1990 12:30:00pm and I wanted to remove 1 hour from it, can I use a format string?

edit

i need to store diary entries and the user can select a reminder type. so 1 hour before hand. so then i’d like to store the format string in a db that i can get and apply to a datetime to get the reminder date time

Answer 1

Best way is to convert to a DateTime object and then back to the formatted string (if that’s what you need):

var time = DateTime.Parse("1/1/1990 12:30:00pm");
time = time.AddMinutes(-10);
string timeString = time.ToString("MM/dd/yyyy hh:mm:ss tt");