Convert AM/PM time to 24 hours format?

Solution 1:

If you need to convert a string to a DateTime you could try

DateTime dt = DateTime.Parse("01:00 PM"); // No error checking

or (with error checking)

DateTime dt;
bool res = DateTime.TryParse("01:00 PM", out dt);

Variable dt contains your datetime, so you can write it

dt.ToString("HH:mm");

Last one works for every DateTime var you have, so if you still have a DateTime, you can write it out in this way.

Solution 2:

You'll want to become familiar with Custom Date and Time Format Strings.

DateTime localTime = DateTime.Now;

// 24 hour format -- use 'H' or 'HH'
string timeString24Hour = localTime.ToString("HH:mm", CultureInfo.CurrentCulture);

Solution 3:

Convert a string to a DateTime, you could try

    DateTime timeValue = Convert.ToDateTime("01:00 PM");
    Console.WriteLine(timeValue.ToString("HH:mm"));

Solution 4:

int hour = your hour value;
int min = your minute value;
String ampm = your am/pm value;

hour = ampm == "AM" ? hour : (hour % 12) + 12; //convert 12-hour time to 24-hour

var dateTime = new DateTime(0,0,0, hour, min, 0);
var timeString = dateTime.ToString("HH:mm");