DateTime.ToString メソッド

[アーティクル]
03/28/2008

インスタンスの値をそれと等価な文字列形式に変換します。

オーバーロードの一覧

このインスタンスの値をそれと等価な文字列に変換します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Overrides Public Function ToString() As String

[C#] public override string ToString();

[C++] public: String* ToString();

[JScript] public override function ToString() : String;

指定したカルチャ固有の書式情報を使用して、このインスタンスの値をそれと等価な文字列形式に変換します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Overridable Function ToString(IFormatProvider) As String

[C#] public virtual string ToString(IFormatProvider);

[C++] public: virtual String* ToString(IFormatProvider*);

[JScript] public function ToString(IFormatProvider) : String;

指定した書式を使用して、このインスタンスの値をそれと等価な文字列形式に変換します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Function ToString(String) As String

[C#] public string ToString(string);

[C++] public: String* ToString(String*);

[JScript] public function ToString(String) : String;

指定した書式およびカルチャ固有の書式情報を使用して、このインスタンスの値をそれと等価の文字列形式に変換します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Overridable Function ToString(String, IFormatProvider) As String

[C#] public virtual string ToString(string, IFormatProvider);

[C++] public: virtual String* ToString(String*, IFormatProvider*);

[JScript] public function ToString(String, IFormatProvider) : String;

使用例

次のサンプルでは、Invariant DateTimeFormatInfo を使用して DateTime 値を書式指定するさまざまな方法を示します。

 
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
   */
   }
}

[C++] 
#using <mscorlib.dll>
 
 using namespace System;
 using namespace System::Globalization; 
 
 void main ()
 {
   DateTime dt = DateTime::Now;
   String* format[] = {
     L"d", L"D",
     L"f", L"F",
     L"g", L"G",
     L"m",
     L"r",
     L"s",
     L"t", L"T",
     L"u", L"U",
     L"y",
     L"dddd, MMMM dd yyyy",
     L"ddd, MMM d \"'\"yy",
     L"dddd, MMMM dd",
     L"M/yy",
     L"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], L" :" , 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
    */
 }

[JScript] 
import System;
import System.Globalization; 
 

var dt : DateTime = DateTime.Now;
var format : 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",
    ];
var date : String;
for (var i : int = 0; i < format.Length; i++) {
    date = dt.ToString(format[i], DateTimeFormatInfo.InvariantInfo);
    Console.WriteLine(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
    */

参照

DateTime 構造体 | DateTime メンバ | System 名前空間

次の方法で共有

DateTime.ToString メソッド

オーバーロードの一覧

使用例

参照

その他のリソース