DayOfWeek 列挙体とは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

DayOfWeek 列挙体

曜日を指定します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

<SerializableAttribute> _
<ComVisibleAttribute(True)> _
Public Enumeration DayOfWeek

Visual Basic (使用法)

Dim instance As DayOfWeek

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public enum DayOfWeek

C++

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public enum class DayOfWeek

/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public enum DayOfWeek

JScript

SerializableAttribute 
ComVisibleAttribute(true) 
public enum DayOfWeek

メンバ

	メンバ名	説明
	Friday	金曜日を示します。
	Monday	月曜日を示します。
	Saturday	土曜日を示します。
	Sunday	日曜日を示します。
	Thursday	木曜日を示します。
	Tuesday	火曜日を示します。
	Wednesday	水曜日を示します。

解説

DayOfWeek 列挙型は、1 週間が 7 日ある予定表の曜日を表します。この列挙型の範囲は、日曜日を示す 0 から土曜日を示す 6 までです。

この列挙型は、曜日を厳密に型指定する必要がある場合に役立ちます。たとえば、この列挙型は DateTime.DayOfWeek プロパティのプロパティ値の型です。

使用例

DateTime.DayOfWeek プロパティおよび DayOfWeek 列挙体の例を次に示します。

Visual Basic

' This example demonstrates the DateTime.DayOfWeek property
Imports System

Class Sample
   Public Shared Sub Main()
      ' Assume the current culture is en-US.
      ' Create a DateTime for the first of May, 2003.
      Dim dt As New DateTime(2003,
 5, 1)
      Console.WriteLine("Is Thursday the day of the week for {0:d}?:
 {1}", _
                         dt, dt.DayOfWeek = DayOfWeek.Thursday)
      Console.WriteLine("The day of the week for {0:d} is {1}.",
 dt, dt.DayOfWeek)
   End Sub 'Main
End Class 'Sample
'
'This example produces the following results:
'
'Is Thursday the day of the week for 5/1/2003?: True
'The day of the week for 5/1/2003 is Thursday.
'

// This example demonstrates the DateTime.DayOfWeek property
using System;

class Sample 
{
    public static void Main()
 
    {
// Assume the current culture is en-US.
// Create a DateTime for the first of May, 2003.
    DateTime dt = new DateTime(2003, 5, 1);
    Console.WriteLine("Is Thursday the day of the week for
 {0:d}?: {1}", 
                       dt, dt.DayOfWeek == DayOfWeek.Thursday);
    Console.WriteLine("The day of the week for {0:d} is {1}.",
 dt, dt.DayOfWeek);
    }
}
/*
This example produces the following results:

Is Thursday the day of the week for 5/1/2003?: True
The day of the week for 5/1/2003 is Thursday.
*/

C++

// This example demonstrates the DateTime.DayOfWeek property
using namespace System;
int main()
{
   
   // Assume the current culture is en-US.
   // Create a DateTime for the first of May, 2003.
   DateTime dt = DateTime(2003,5,1);
   Console::WriteLine(  "Is Thursday the day of the week for
 {0:d}?: {1}", dt, dt.DayOfWeek == DayOfWeek::Thursday );
   Console::WriteLine(  "The day of the week for {0:d} is
 {1}.", dt, dt.DayOfWeek );
}

/*
This example produces the following results:

Is Thursday the day of the week for 5/1/2003?: True
The day of the week for 5/1/2003 is Thursday.
*/

// This example demonstrates the DateTime.DayOfWeek property
import System.*;

class Sample
{
    public static void main(String[]
 args)
    {
        // Assume the current culture is en-US.
        // Create a DateTime for the first of May, 2003.
        DateTime dt = new DateTime(2003, 5, 1);
        Console.WriteLine("Is Thursday the day of the week for
 {0:d}?: {1}", 
            dt, (System.Boolean)(dt.get_DayOfWeek() == DayOfWeek.Thursday));
        Console.WriteLine("The day of the week for {0:d}
 is {1}.", dt, 
            dt.get_DayOfWeek());
    } //main
} //Sample
/*
This example produces the following results:

Is Thursday the day of the week for 5/1/2003?: True
The day of the week for 5/1/2003 is Thursday.
*/