DayOfWeek 列舉
重要
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指定一週中的星期名稱。
public enum class DayOfWeekC#
public enum DayOfWeekC#
[System.Serializable]
public enum DayOfWeekC#
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public enum DayOfWeektype DayOfWeek = [<System.Serializable>]
type DayOfWeek = [<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type DayOfWeek = Public Enum DayOfWeek- 繼承
- 屬性
| 名稱 | 值 | Description |
|---|---|---|
| Friday | 5 | 表示星期五。 |
| Monday | 1 | 表示星期一。 |
| Saturday | 6 | 表示星期六。 |
| Sunday | 0 | 表示星期天。 |
| Thursday | 4 | 表示星期四。 |
| Tuesday | 2 | 表示星期二。 |
| Wednesday | 3 | 表示星期三。 |
下列範例示範 DateTime.DayOfWeek 屬性和 DayOfWeek 列舉。
// 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.
*/
C#
// 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.
*/
// This example demonstrates the DateTime.DayOfWeek property
open System
// Assume the current culture is en-US.
// Create a DateTime for the first of May, 2003.
let dt = DateTime(2003, 5, 1)
printfn $"Is Thursday the day of the week for {dt:d}?: {dt.DayOfWeek = DayOfWeek.Thursday}"
printfn $"The day of the week for {dt:d} is {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
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
End Class
'
'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.
'
列舉 DayOfWeek 表示日曆中每週有七天的星期幾。 這個列舉中的常數值範圍從星期日到星期六。 如果轉換成整數，則其值範圍從零 (，表示星期日) 為六 (，表示星期六) 。
當想要有星期幾的強型別規格時，這個列舉就很有用。 例如，這個列舉是 和 DateTimeOffset.DayOfWeek 屬性的屬性值 DateTime.DayOfWeek 類型。
列舉的成員 DayOfWeek 不會當地語系化。 若要傳回星期一天的當地語系化名稱，請使用 「ddd」 或 「dd」 格式字串呼叫 DateTime.ToString(String) 或 DateTime.ToString(String, IFormatProvider) 方法。 先前的格式字串會產生縮寫的工作日名稱;後者會產生完整的工作日名稱。
| 產品 | 版本 |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7 |
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 |
| .NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
| UWP | 10.0 |