using System; class MainClass { public static void DisplayDateTime(string name, DateTime myDateTime) { Console.WriteLine(name + " = " + myDateTime); Console.WriteLine(name + ".Year = " + myDateTime.Year); Console.WriteLine(name + ".Month = " + myDateTime.Month); Console.WriteLine(name + ".Day = " + myDateTime.Day); Console.WriteLine(name + ".Hour = " + myDateTime.Hour); Console.WriteLine(name + ".Minute = " + myDateTime.Minute); Console.WriteLine(name + ".Second = " + myDateTime.Second); Console.WriteLine(name + ".Millisecond = " + myDateTime.Millisecond); Console.WriteLine(name + ".Ticks = " + myDateTime.Ticks); } public static void Main() { int year = 2008; int month = 8; int day = 25; DateTime myDateTime = new DateTime(year, month, day); int hour = 23; int minute = 30; int second = 12; int millisecond = 5; DateTime myDateTime2 = new DateTime(year, month, day, hour, minute, second, millisecond); System.Globalization.JulianCalendar myCalendar = new System.Globalization.JulianCalendar(); DateTime myDateTime3 = new DateTime(year, month, day, myCalendar); DateTime myDateTime4 = new DateTime(0); DisplayDateTime("myDateTime", myDateTime); DisplayDateTime("myDateTime2", myDateTime2); DisplayDateTime("myDateTime3", myDateTime3); DisplayDateTime("myDateTime4", myDateTime4); TimeSpan myTimeSpan = new TimeSpan(4, 12, 10); myDateTime4 += myTimeSpan; DisplayDateTime("myDateTime4", myDateTime4); } }
Development Class
Offset of DateTime
using System; public class MainClass { public static void Main() { DateTimeOffset local = DateTimeOffset.Now; DateTimeOffset utc = local.ToUniversalTime(); Console.WriteLine(local.Offset); // -06:00:00 (in Central America) Console.WriteLine(utc.Offset); // 00:00:00 Console.WriteLine(local == utc); // True //To include the Offset in the comparison, you must use the EqualsExact method: Console.WriteLine(local.EqualsExact(utc)); // False } }
Specify Kind DateTime
using System; public class MainClass { public static void Main() { DateTime d = new DateTime(2000, 12, 12); DateTime utc = DateTime.SpecifyKind(d, DateTimeKind.Utc); Console.WriteLine(utc); } }
new DateTime(1900, 2, 29, new JulianCalendar())
using System; using System.Globalization; class MainClass { public static void Main() { DateTime dt = new DateTime(1900, 2, 29, new JulianCalendar()); } }
new DateTime(1900, 2, 29)
using System; class MainClass { public static void Main() { DateTime dt = new DateTime(1900, 2, 29); } }
DateTime Now and its calculation
using System; class MainClass { public static void Main() { TimeSpan timespan1 = new TimeSpan(2, 12, 0, 0); TimeSpan timespan2 = new TimeSpan(4, 12, 0, 0); TimeSpan oneWeek = timespan1 + timespan2; DateTime now = DateTime.Now; DateTime past = now - oneWeek; DateTime future = now + oneWeek; Console.WriteLine("Now : {0}", now); Console.WriteLine("Past : {0}", past); Console.WriteLine("Future: {0}", future); } }
Parse and ParseExact
using System; class MainClass { public static void Main(string[] args) { DateTime dt1 = DateTime.Parse("Sep 2005"); Console.WriteLine(dt1); DateTime dt2 = DateTime.Parse("Monday 5 September 2005 14:15:33"); Console.WriteLine(dt2); DateTime dt3 = DateTime.Parse("5, 9,05"); Console.WriteLine(dt3); DateTime dt4 = DateTime.Parse("5/9/2005 14:15:33"); Console.WriteLine(dt4); DateTime dt5 = DateTime.Parse("2:15 PM"); Console.WriteLine(dt5); DateTime dt6 = DateTime.ParseExact("2:13:30 PM", "h:mm:ss tt", null); Console.WriteLine(dt6); DateTime dt7 = DateTime.ParseExact("Mon, 05 Sep 2005 14:13:30 GMT","ddd, dd MMM yyyy HH':'mm':'ss 'GMT'", null); Console.WriteLine(dt7); DateTime dt8 = DateTime.ParseExact("September 05", "MMMM dd", null); Console.WriteLine(dt8); } }