DateTime Constructor (Int32, Int32, Int32, Calendar)

Parameters

• year
  Type: System.Int32
  The year (1 through the number of years in calendar).

• month
  Type: System.Int32
  The month (1 through the number of months in calendar).

• day
  Type: System.Int32
  The day (1 through the number of days in month).

• calendar
  Type: System.Globalization.Calendar
  The calendar to use to interpret year, month, and day.

Imports System.Globalization
Imports System.Text.RegularExpressions
Imports System.Threading

Module Example
   Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      ' Define Hijri calendar.
      Dim hijri As New HijriCalendar()
      ' Define a date using the Hijri calendar.
      Dim date1 As New Date(1431, 9, 9, hijri)

      outputBlock.Text &= "Using the Hijri Calendar with the Default Culture:" & vbCrLf
      outputBlock.Text &= date1.ToString() & vbCrLf
      outputBlock.Text += String.Format("{0}/{1}/{2}", hijri.GetMonth(date1), _
                                       hijri.GetDayOfMonth(date1), _
                                       hijri.GetYear(date1)) + vbCrLf
      outputBlock.Text &= vbCrLf

      ' Get current culture so it can later be restored.
      Dim dftCulture As CultureInfo = Thread.CurrentThread.CurrentCulture

      ' Make ar-SY the current culture and Hijri the current calendar.
      Thread.CurrentThread.CurrentCulture = New CultureInfo("ar-SY")
      Dim current As CultureInfo = CultureInfo.CurrentCulture
      current.DateTimeFormat.Calendar = hijri
      Dim dFormat As String = current.DateTimeFormat.ShortDatePattern
      ' Ensure year is displayed as four digits.
      dFormat = Regex.Replace(dFormat, "/yy$", "/yyyy")
      current.DateTimeFormat.ShortDatePattern = dFormat
      outputBlock.Text += String.Format("{0} culture using the {1} calendar: {2:d}", current, _
                        GetCalendarName(hijri), date1) & vbCrLf

      ' Restore previous culture.
      Thread.CurrentThread.CurrentCulture = dftCulture
      outputBlock.Text += String.Format("{0} culture using the {1} calendar: {2:d}", _
                        CultureInfo.CurrentCulture, _
                        GetCalendarName(CultureInfo.CurrentCulture.Calendar), _
                        date1) & vbCrLf
   End Sub

   Private Function GetCalendarName(ByVal cal As Calendar) As String
      Return Regex.Match(cal.ToString(), "\.(\w+)Calendar").Groups(1).Value
   End Function
End Module
' The example displays the following output:
'       Using the Hijri Calendar with the Default Culture:
'       8/18/2010 12:00:00 AM
'       9/9/1431
'       
'       ar-SY culture using the Hijri calendar: 09/09/1431
'       en-US culture using the Gregorian calendar: 8/18/2010

using System;
using System.Globalization;
using System.Text.RegularExpressions;
using System.Threading;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      // Define Hijri calendar.
      HijriCalendar hijri = new HijriCalendar();
      // Define a date using the Hijri calendar.
      DateTime date1 = new DateTime(1431, 9, 9, hijri);

      outputBlock.Text += "Using the Hijri Calendar with the Default Culture:\n";
      outputBlock.Text += date1.ToString() + "\n";
      outputBlock.Text += String.Format("{0}/{1}/{2}\n\n", hijri.GetMonth(date1),
                                       hijri.GetDayOfMonth(date1),
                                       hijri.GetYear(date1));

      // Get current culture so it can later be restored.
      CultureInfo dftCulture = Thread.CurrentThread.CurrentCulture;

      // Make ar-SY the current culture and Hijri the current calendar.
      Thread.CurrentThread.CurrentCulture = new CultureInfo("ar-SY");
      CultureInfo current = CultureInfo.CurrentCulture;
      current.DateTimeFormat.Calendar = hijri;
      string dFormat = current.DateTimeFormat.ShortDatePattern;
      // Ensure year is displayed as four digits.
      dFormat = Regex.Replace(dFormat, "/yy$", "/yyyy");
      current.DateTimeFormat.ShortDatePattern = dFormat;
      outputBlock.Text += String.Format("{0} culture using the {1} calendar: {2:d}\n", current,
                        GetCalendarName(hijri), date1);

      // Restore previous culture.
      Thread.CurrentThread.CurrentCulture = dftCulture;
      outputBlock.Text += String.Format("{0} culture using the {1} calendar: {2:d}\n",
                        CultureInfo.CurrentCulture,
                        GetCalendarName(CultureInfo.CurrentCulture.Calendar),
                        date1);
   }

   private static string GetCalendarName(Calendar cal)
   {
      return Regex.Match(cal.ToString(), "\\.(\\w+)Calendar").Groups[1].Value;
   }
}
// The example displays the following output:
//       Using the Hijri Calendar with the Default Culture:
//       8/18/2010 12:00:00 AM
//       9/9/1431
//       
//       ar-SY culture using the Hijri calendar: 09/09/1431
//       en-US culture using the Gregorian calendar: 8/18/2010
//       
//       Using the Hijri Calendar:
//       ar-SY culture using the Hijri calendar: 09/09/1431
//       en-US culture using the Gregorian calendar: 8/18/2010