How do I generate a list of strings representing 15 minute time intervals between a start and end times in a single day using C#?

Question

I'm creating a form where a user will be able to specify a beginning and end times using preset values. I would like to generate a list of string representations of available 15 min intervals between 9 AM and 5 PM in a single day.

Answer 1

DateTime has a .AddMinutes method. Start there. (DateTime.Now)

Answer 2

Create an outer loop that has the start date given. Have this loop use the AddDays to add a day to it until the end date.

Create a loop inside this loop and start with a time of 9AM and loop until 5PM with 15 minute increments using Silky's mentioning of the DateTime .AddMinutes Method. At the 15 minute increments you can add to a list of strings the Time.

:)

Answer 3

Something like the following should do the trick;

for (var time = new DateTime(2000,1,1,9,0,0); time <= new DateTime(2000,1,1,17,0,0); time = time.AddMinutes(15))
{
  Console.WriteLine("{0:t}", time);
}

Answer 4

List<string> query = Enumerable.Range(0, 33).Select(i => 
    DateTime.Today.AddHours(9).AddMinutes(i * 15).ToString()).ToList();

or

int i = -1;
while(DateTime.Today.AddHours(9).AddMinutes(i * 15).Hour < 17)
    Console.WriteLine(DateTime.Today.AddHours(9).AddMinutes(15 * (++i)));

Thats for the current day, in case you are saving the values in a database.

Answer 5

Here's the code

        DateTime start = new DateTime(1900, 1, 1, 9, 0, 0);
        DateTime end = new DateTime(1900, 1, 1, 17, 0, 0);
        DateTime current = start;
        while (current <= end)
        {
            Console.WriteLine(current.ToString("HH:mm"));
            current = current.AddMinutes(15);
        }