DateTime.DayOfWeek 属性

定义

命名空间:

System

程序集:

System.Runtime.dll

程序集:

netstandard.dll

程序集:

mscorlib.dll

获取此实例所表示的日期是星期几。

public:
 property DayOfWeek DayOfWeek { DayOfWeek get(); };

public DayOfWeek DayOfWeek { get; }

member this.DayOfWeek : DayOfWeek

Public ReadOnly Property DayOfWeek As DayOfWeek

属性值

DayOfWeek

一个枚举常量，指示此 DateTime 值是星期几。

示例

下面的示例演示 属性和 DayOfWeek System.DayOfWeek 枚举。

// 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
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
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.
'

注解

枚举中常量的值的范围 DayOfWeek 从 到 DayOfWeek.Sunday DayOfWeek.Saturday 。 如果强制转换为整数，则其值的范围为零 (，这表示) DayOfWeek.Sunday 到 (个整数 DayOfWeek.Saturday) 。

DayOfWeek属性返回枚举的常量;它不反映系统的区域和语言设置。 若要检索表示特定日期的本地化工作日名称的字符串，请调用包含 参数的方法的重载之一，并传递 或 ToString format ddd dddd 自定义格式字符串。 有关详细信息，请参阅 如何：从特定日期中提取星期日期。

另请参阅

• Ticks
• Int32