using System; using System.Globalization; public class DatesApp { public static void Main(string[] args) { DateTime dt = DateTime.Now; Console.WriteLine(dt); Console.WriteLine("date = {0}, time = {1} ",dt.Date, dt.TimeOfDay); } }
Look at the min and max date/time values
using System; using System.Globalization; class MainClass { public static void Main() { Console.WriteLine("Min Date: {0}", DateTime.MinValue.ToString()); Console.WriteLine("Max Date: {0}", DateTime.MaxValue.ToString()); } }
Do some leap year checks
using System;
using System.Globalization;
class MainClass {
public static void Main() {
//
int[] years = { 1984, 2000, 1999, 2002 };
for (int i = 0; i < years.Length; ++i) {
if (DateTime.IsLeapYear(years[i]))
Console.WriteLine("Year {0} is a leap year", years[i]);
else
Console.WriteLine("Year {0} is NOT a leap year", years[i]);
}
}
}
[/csharp]
What day of the month is this?
using System; using System.Collections.Generic; using System.Text; class Program { static void Main(string[] args) { DateTime dt = new DateTime(2004, 10, 17); Console.WriteLine("The day of {0} is {1}", dt.Date, dt.DayOfWeek); } }
Add 2 month to the date time
using System; using System.Collections.Generic; using System.Text; class Program { static void Main(string[] args) { DateTime dt = new DateTime(2004, 10, 17); dt.AddMonths(2); // Month is now December. Console.WriteLine("Daylight savings: {0}", dt.IsDaylightSavingTime()); } }
Current date and time
using System; using System.Globalization; class MainClass { public static void Main() { Console.WriteLine("Current Date and Time: {0}", DateTime.Now.ToString()); Console.WriteLine("Current Date Only: {0}", DateTime.Today.ToString()); } }
Converts a Date to a string using relative time.
//Microsoft Public License (Ms-PL)
//http://visualizer.codeplex.com/license
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Redwerb.BizArk.Core.DateExt
{
///
///
public static class DateExt
{
///
///
///
///
public static string ToRelativeTimeString(this DateTime value)
{
const int SECOND = 1;
const int MINUTE = 60 * SECOND;
const int HOUR = 60 * MINUTE;
const int DAY = 24 * HOUR;
const int MONTH = 30 * DAY;
var ts = DateTime.Now.Subtract(value);
double seconds = ts.TotalSeconds;
// Less than one minute
if (seconds < 1 * MINUTE)
return ts.Seconds == 1 ? "one second ago" : ts.Seconds + " seconds ago";
if (seconds < 60 * MINUTE)
return ts.Minutes + " minutes ago";
if (seconds < 120 * MINUTE)
return "an hour ago";
if (seconds < 24 * HOUR)
return ts.Hours + " hours ago";
if (seconds < 48 * HOUR)
return "yesterday";
if (seconds < 30 * DAY)
return ts.Days + " days ago";
if (seconds < 12 * MONTH)
{
int months = System.Convert.ToInt32(Math.Floor((double)ts.Days / 30));
return months <= 1 ? "one month ago" : months + " months ago";
}
int years = System.Convert.ToInt32(Math.Floor((double)ts.Days / 365));
return years <= 1 ? "one year ago" : years + " years ago";
}
}
}
[/csharp]