用DateTimeFormatInfo格式化日期时间

用DateTimeFormatInfo格式化日期时间

[Visual Basic]
Option Explicit
Option Strict

Imports System
Imports System.Globalization

Public Class MainClass
   
    Public Shared Sub Main()
        Dim dt As DateTime = DateTime.Now
        Dim myformat() As String =  {"d", "D", _
                                    "f", "F", _
                                    "g", "G", _
                                    "m", _
                                    "r", _
                                    "s", _
                                    "t", "T", _
                                    "u", "U", _
                                    "y", _
                                    "dddd, MMMM dd yyyy", _
                                    "ddd, MMM d ""'""yy", _
                                    "dddd, MMMM dd", _
                                    "M/yy", _
                                    "dd-MM-yy"}
        Dim mydate As String
        Dim i As Integer
        For i = 0 To myformat.Length - 1
            mydate = dt.ToString(myformat(i), DateTimeFormatInfo.InvariantInfo)
            Console.WriteLine(String.Concat(myformat(i), " :", mydate))
        Next i

    ' Output.
    '
    ' d :08/17/2000
    ' D :Thursday, August 17, 2000
    ' f :Thursday, August 17, 2000 16:32
    ' F :Thursday, August 17, 2000 16:32:32
    ' g :08/17/2000 16:32
    ' G :08/17/2000 16:32:32
    ' m :August 17
    ' r :Thu, 17 Aug 2000 23:32:32 GMT
    ' s :2000-08-17T16:32:32
    ' t :16:32
    ' T :16:32:32
    ' u :2000-08-17 23:32:32Z
    ' U :Thursday, August 17, 2000 23:32:32
    ' y :August, 2000
    ' dddd, MMMM dd yyyy :Thursday, August 17 2000
    ' ddd, MMM d "'"yy :Thu, Aug 17 '00
    ' dddd, MMMM dd :Thursday, August 17
    ' M/yy :8/00
    ' dd-MM-yy :17-08-00
    End Sub 'Main
End Class 'MainClass
[C#]
using System;
using System.Globalization;

public class MainClass {
   public static void Main(string[] args)  {
       DateTime dt = DateTime.Now;
       String[] format = {
           "d", "D",
           "f", "F",
           "g", "G",
           "m",
           "r",
           "s",
           "t", "T",
           "u", "U",
           "y",
           "dddd, MMMM dd yyyy",
           "ddd, MMM d \"'\"yy",
           "dddd, MMMM dd",
           "M/yy",
           "dd-MM-yy",
       };
       String date;
       for (int i = 0; i < format.Length; i++) {
           date = dt.ToString(format[i], DateTimeFormatInfo.InvariantInfo);
           Console.WriteLine(String.Concat(format[i], " :" , date));
       }
 
  /** Output.
   *
   * d :08/17/2000
   * D :Thursday, August 17, 2000
   * f :Thursday, August 17, 2000 16:32
   * F :Thursday, August 17, 2000 16:32:32
   * g :08/17/2000 16:32
   * G :08/17/2000 16:32:32
   * m :August 17
   * r :Thu, 17 Aug 2000 23:32:32 GMT
   * s :2000-08-17T16:32:32
   * t :16:32
   * T :16:32:32
   * u :2000-08-17 23:32:32Z
   * U :Thursday, August 17, 2000 23:32:32
   * y :August, 2000
   * dddd, MMMM dd yyyy :Thursday, August 17 2000
   * ddd, MMM d "'"yy :Thu, Aug 17 '00
   * dddd, MMMM dd :Thursday, August 17
   * M/yy :8/00
   * dd-MM-yy :17-08-00
   */
   }
}