DateTimeOffset.DayOfWeek プロパティ
定義
重要
一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。
現在の DateTimeOffset オブジェクトによって表される曜日を取得します。
public:
property DayOfWeek DayOfWeek { DayOfWeek get(); };public DayOfWeek DayOfWeek { get; }member this.DayOfWeek : DayOfWeekPublic ReadOnly Property DayOfWeek As DayOfWeekプロパティ値
現在の DateTimeOffset オブジェクトの曜日を示す列挙値の 1 つ。
例
次の例では、2008 年の各月の最初の日の曜日名を表示します。
DateTimeOffset startOfMonth = new DateTimeOffset(2008, 1, 1, 0, 0, 0,
DateTimeOffset.Now.Offset);
int year = startOfMonth.Year;
do
{
Console.WriteLine("{0:MMM d, yyyy} is a {1}.", startOfMonth, startOfMonth.DayOfWeek);
startOfMonth = startOfMonth.AddMonths(1);
}
while (startOfMonth.Year == year);
// This example writes the following output to the console:
// Jan 1, 2008 is a Tuesday.
// Feb 1, 2008 is a Friday.
// Mar 1, 2008 is a Saturday.
// Apr 1, 2008 is a Tuesday.
// May 1, 2008 is a Thursday.
// Jun 1, 2008 is a Sunday.
// Jul 1, 2008 is a Tuesday.
// Aug 1, 2008 is a Friday.
// Sep 1, 2008 is a Monday.
// Oct 1, 2008 is a Wednesday.
// Nov 1, 2008 is a Saturday.
// Dec 1, 2008 is a Monday.
let mutable startOfMonth = DateTimeOffset(2008, 1, 1, 0, 0, 0, DateTimeOffset.Now.Offset)
let year = startOfMonth.Year
while startOfMonth.Year = year do
printfn $"""{startOfMonth.ToString "MMM d, yyyy"} is a {startOfMonth.DayOfWeek}."""
startOfMonth <- startOfMonth.AddMonths 1
// This example writes the following output to the console:
// Jan 1, 2008 is a Tuesday.
// Feb 1, 2008 is a Friday.
// Mar 1, 2008 is a Saturday.
// Apr 1, 2008 is a Tuesday.
// May 1, 2008 is a Thursday.
// Jun 1, 2008 is a Sunday.
// Jul 1, 2008 is a Tuesday.
// Aug 1, 2008 is a Friday.
// Sep 1, 2008 is a Monday.
// Oct 1, 2008 is a Wednesday.
// Nov 1, 2008 is a Saturday.
// Dec 1, 2008 is a Monday.
Dim startOfMonth As New DateTimeOffset(#1/1/2008#, _
DateTimeOffset.Now.Offset)
Dim year As Integer = startOfMonth.Year
Do While startOfMonth.Year = year
Console.WriteLine("{0:MMM d, yyyy} is a {1}.", _
startOfMonth, startOfMonth.DayOfWeek)
startOfMonth = startOfMonth.AddMonths(1)
Loop
' This example writes the following output to the console:
' Jan 1, 2008 is a Tuesday.
' Feb 1, 2008 is a Friday.
' Mar 1, 2008 is a Saturday.
' Apr 1, 2008 is a Tuesday.
' May 1, 2008 is a Thursday.
' Jun 1, 2008 is a Sunday.
' Jul 1, 2008 is a Tuesday.
' Aug 1, 2008 is a Friday.
' Sep 1, 2008 is a Monday.
' Oct 1, 2008 is a Wednesday.
' Nov 1, 2008 is a Saturday.
' Dec 1, 2008 is a Monday.
注釈
列挙範囲DayOfWeek.SundayDayOfWeek.Saturdayの定数DayOfWeekの値。 整数にキャストすると、その値は 0 (示 DayOfWeek.Sundayす) から 6 (示す DayOfWeek.Saturday) の範囲になります。
また、"D" 書式指定子または "dddd" カスタム書式指定子を使用して、特定の日付の曜日名を表示することもできます。 次に例を示します。
DateTimeOffset displayDate = new DateTimeOffset(2008, 1, 1, 13, 18, 00,
DateTimeOffset.Now.Offset);
Console.WriteLine("{0:D}", displayDate); // Output: Tuesday, January 01, 2008
Console.WriteLine("{0:d} is a {0:dddd}.",
displayDate); // Output: 1/1/2008 is a Tuesday.
let displayDate = DateTimeOffset(2008, 1, 1, 13, 18, 00, DateTimeOffset.Now.Offset)
printfn $"{displayDate:D}" // Output: Tuesday, January 01, 2008
printfn $"{displayDate:d} is a {displayDate:dddd}." // Output: 1/1/2008 is a Tuesday.
Dim displayDate As New DateTimeOffset(#1/1/2008 1:18PM#, _
DateTimeOffset.Now.Offset)
Console.WriteLine("{0:D}", displayDate) ' Output: Tuesday, January 01, 2008
Console.WriteLine("{0:d} is a {0:dddd}.", _
displayDate) ' Output: 1/1/2008 is a Tuesday.
このプロパティによって返される列挙メンバーのDayOfWeekメソッドをToString呼び出すことによって返される文字列はローカライズされないことに注意してください。 現在のカルチャまたは特定のカルチャの曜日名を含む文字列を抽出するには、"dddd" カスタム書式指定子を使用してメソッドを呼び出します ToString 。 たとえば、次のコードは、カルチャを使用して日付の曜日名を fr-fr 表示します。
DateTimeOffset thisDate = new DateTimeOffset(2007, 6, 1, 6, 15, 0,
DateTimeOffset.Now.Offset);
string weekdayName = thisDate.ToString("dddd",
new CultureInfo("fr-fr"));
Console.WriteLine(weekdayName); // Displays vendredi
let thisDate = DateTimeOffset(2007, 6, 1, 6, 15, 0, DateTimeOffset.Now.Offset)
let weekdayName = thisDate.ToString("dddd", CultureInfo "fr-fr")
printfn $"{weekdayName}" // Displays vendredi
Dim thisDate As New DateTimeOffset(#6/1/2007 6:15AM#, _
DateTimeOffset.Now.Offset)
Dim weekdayName As String = thisDate.ToString("dddd", _
New CultureInfo("fr-fr"))
Console.WriteLine(weekdayName) ' Displays vendredi