Calendar.AddWeeks メソッド
アセンブリ: mscorlib (mscorlib.dll 内)

Dim instance As Calendar Dim time As DateTime Dim weeks As Integer Dim returnValue As DateTime returnValue = instance.AddWeeks(time, weeks)
- weeks
加算する週の数。
指定した DateTime に指定した週数を加算した結果の DateTime。


weeks 値が指定された DateTime に加算されます。weeks が負の場合、結果の DateTime は、指定した DateTime よりも前の値になります。
結果として得られる日付が、指定した DateTime の月の範囲外の場合、結果として得られる DateTime の月の部分に影響します。結果として得られる月が、指定した DateTime の年の範囲外の場合、結果として得られる DateTime の年の部分に影響します。結果として得られる年が、指定した DateTime の時代 (年号) の範囲外の場合、結果として得られる DateTime の時代 (年号) の部分に影響します。結果として得られる DateTime の時刻の部分は、指定した DateTime の値と同じままです。
Calendar クラスから派生するすべての .NET Framework クラスで、1 週間は 7 日として定義されます。

Imports System Imports System.Globalization Public Class SamplesCalendar Public Shared Sub Main() ' Sets a DateTime to April 3, 2002 of the Gregorian calendar. Dim myDT As New DateTime(2002, 4, 3, New GregorianCalendar()) ' Uses the default calendar of the InvariantCulture. Dim myCal As Calendar = CultureInfo.InvariantCulture.Calendar ' Displays the values of the DateTime. Console.WriteLine("April 3, 2002 of the Gregorian calendar:") DisplayValues(myCal, myDT) ' Adds 5 to every component of the DateTime. myDT = myCal.AddYears(myDT, 5) myDT = myCal.AddMonths(myDT, 5) myDT = myCal.AddWeeks(myDT, 5) myDT = myCal.AddDays(myDT, 5) myDT = myCal.AddHours(myDT, 5) myDT = myCal.AddMinutes(myDT, 5) myDT = myCal.AddSeconds(myDT, 5) myDT = myCal.AddMilliseconds(myDT, 5) ' Displays the values of the DateTime. Console.WriteLine("After adding 5 to each component of the DateTime:") DisplayValues(myCal, myDT) End Sub 'Main Public Shared Sub DisplayValues(myCal As Calendar, myDT As DateTime) Console.WriteLine(" Era: {0}", myCal.GetEra(myDT)) Console.WriteLine(" Year: {0}", myCal.GetYear(myDT)) Console.WriteLine(" Month: {0}", myCal.GetMonth(myDT)) Console.WriteLine(" DayOfYear: {0}", myCal.GetDayOfYear(myDT)) Console.WriteLine(" DayOfMonth: {0}", myCal.GetDayOfMonth(myDT)) Console.WriteLine(" DayOfWeek: {0}", myCal.GetDayOfWeek(myDT)) Console.WriteLine(" Hour: {0}", myCal.GetHour(myDT)) Console.WriteLine(" Minute: {0}", myCal.GetMinute(myDT)) Console.WriteLine(" Second: {0}", myCal.GetSecond(myDT)) Console.WriteLine(" Milliseconds: {0}", myCal.GetMilliseconds(myDT)) Console.WriteLine() End Sub 'DisplayValues End Class 'SamplesCalendar 'This code produces the following output. ' 'April 3, 2002 of the Gregorian calendar: ' Era: 1 ' Year: 2002 ' Month: 4 ' DayOfYear: 93 ' DayOfMonth: 3 ' DayOfWeek: Wednesday ' Hour: 0 ' Minute: 0 ' Second: 0 ' Milliseconds: 0 ' 'After adding 5 to each component of the DateTime: ' Era: 1 ' Year: 2007 ' Month: 10 ' DayOfYear: 286 ' DayOfMonth: 13 ' DayOfWeek: Saturday ' Hour: 5 ' Minute: 5 ' Second: 5 ' Milliseconds: 5
using System; using System.Globalization; public class SamplesCalendar { public static void Main() { // Sets a DateTime to April 3, 2002 of the Gregorian calendar. DateTime myDT = new DateTime( 2002, 4, 3, new GregorianCalendar() ); // Uses the default calendar of the InvariantCulture. Calendar myCal = CultureInfo.InvariantCulture.Calendar; // Displays the values of the DateTime. Console.WriteLine( "April 3, 2002 of the Gregorian calendar:" ); DisplayValues( myCal, myDT ); // Adds 5 to every component of the DateTime. myDT = myCal.AddYears( myDT, 5 ); myDT = myCal.AddMonths( myDT, 5 ); myDT = myCal.AddWeeks( myDT, 5 ); myDT = myCal.AddDays( myDT, 5 ); myDT = myCal.AddHours( myDT, 5 ); myDT = myCal.AddMinutes( myDT, 5 ); myDT = myCal.AddSeconds( myDT, 5 ); myDT = myCal.AddMilliseconds( myDT, 5 ); // Displays the values of the DateTime. Console.WriteLine( "After adding 5 to each component of the DateTime:" ); DisplayValues( myCal, myDT ); } public static void DisplayValues( Calendar myCal, DateTime myDT ) { Console.WriteLine( " Era: {0}", myCal.GetEra( myDT ) ); Console.WriteLine( " Year: {0}", myCal.GetYear( myDT ) ); Console.WriteLine( " Month: {0}", myCal.GetMonth( myDT ) ); Console.WriteLine( " DayOfYear: {0}", myCal.GetDayOfYear( myDT ) ); Console.WriteLine( " DayOfMonth: {0}", myCal.GetDayOfMonth( myDT ) ); Console.WriteLine( " DayOfWeek: {0}", myCal.GetDayOfWeek( myDT ) ); Console.WriteLine( " Hour: {0}", myCal.GetHour( myDT ) ); Console.WriteLine( " Minute: {0}", myCal.GetMinute( myDT ) ); Console.WriteLine( " Second: {0}", myCal.GetSecond( myDT ) ); Console.WriteLine( " Milliseconds: {0}", myCal.GetMilliseconds( myDT ) ); Console.WriteLine(); } } /* This code produces the following output. April 3, 2002 of the Gregorian calendar: Era: 1 Year: 2002 Month: 4 DayOfYear: 93 DayOfMonth: 3 DayOfWeek: Wednesday Hour: 0 Minute: 0 Second: 0 Milliseconds: 0 After adding 5 to each component of the DateTime: Era: 1 Year: 2007 Month: 10 DayOfYear: 286 DayOfMonth: 13 DayOfWeek: Saturday Hour: 5 Minute: 5 Second: 5 Milliseconds: 5 */
using namespace System; using namespace System::Globalization; void DisplayValues( Calendar^ myCal, DateTime myDT ) { Console::WriteLine( " Era: {0}", myCal->GetEra( myDT ) ); Console::WriteLine( " Year: {0}", myCal->GetYear( myDT ) ); Console::WriteLine( " Month: {0}", myCal->GetMonth( myDT ) ); Console::WriteLine( " DayOfYear: {0}", myCal->GetDayOfYear( myDT ) ); Console::WriteLine( " DayOfMonth: {0}", myCal->GetDayOfMonth( myDT ) ); Console::WriteLine( " DayOfWeek: {0}", myCal->GetDayOfWeek( myDT ) ); Console::WriteLine( " Hour: {0}", myCal->GetHour( myDT ) ); Console::WriteLine( " Minute: {0}", myCal->GetMinute( myDT ) ); Console::WriteLine( " Second: {0}", myCal->GetSecond( myDT ) ); Console::WriteLine( " Milliseconds: {0}", myCal->GetMilliseconds( myDT ) ); Console::WriteLine(); } int main() { // Sets a DateTime to April 3, 2002 of the Gregorian calendar. DateTime myDT = DateTime(2002,4,3,gcnew GregorianCalendar); // Uses the default calendar of the InvariantCulture. Calendar^ myCal = CultureInfo::InvariantCulture->Calendar; // Displays the values of the DateTime. Console::WriteLine( "April 3, 2002 of the Gregorian calendar:" ); DisplayValues( myCal, myDT ); // Adds 5 to every component of the DateTime. myDT = myCal->AddYears( myDT, 5 ); myDT = myCal->AddMonths( myDT, 5 ); myDT = myCal->AddWeeks( myDT, 5 ); myDT = myCal->AddDays( myDT, 5 ); myDT = myCal->AddHours( myDT, 5 ); myDT = myCal->AddMinutes( myDT, 5 ); myDT = myCal->AddSeconds( myDT, 5 ); myDT = myCal->AddMilliseconds( myDT, 5 ); // Displays the values of the DateTime. Console::WriteLine( "After adding 5 to each component of the DateTime:" ); DisplayValues( myCal, myDT ); } /* This code produces the following output. April 3, 2002 of the Gregorian calendar: Era: 1 Year: 2002 Month: 4 DayOfYear: 93 DayOfMonth: 3 DayOfWeek: Wednesday Hour: 0 Minute: 0 Second: 0 Milliseconds: 0 After adding 5 to each component of the DateTime: Era: 1 Year: 2007 Month: 10 DayOfYear: 286 DayOfMonth: 13 DayOfWeek: Saturday Hour: 5 Minute: 5 Second: 5 Milliseconds: 5 */
import System.* ; import System.Globalization.* ; public class SamplesCalendar { public static void main(String[] args) { // Sets a DateTime to April 3, 2002 of the Gregorian calendar. DateTime myDT = new DateTime(2002, 4, 3, new GregorianCalendar()); // Uses the default calendar of the InvariantCulture. Calendar myCal = CultureInfo.get_InvariantCulture().get_Calendar(); // Displays the values of the DateTime. Console.WriteLine("April 3, 2002 of the Gregorian calendar:"); DisplayValues(myCal, myDT); // Adds 5 to every component of the DateTime. myDT = myCal.AddYears(myDT, 5); myDT = myCal.AddMonths(myDT, 5); myDT = myCal.AddWeeks(myDT, 5); myDT = myCal.AddDays(myDT, 5); myDT = myCal.AddHours(myDT, 5); myDT = myCal.AddMinutes(myDT, 5); myDT = myCal.AddSeconds(myDT, 5); myDT = myCal.AddMilliseconds(myDT, 5); // Displays the values of the DateTime. Console.WriteLine("After adding 5 to each component of the DateTime:"); DisplayValues(myCal, myDT); } //main public static void DisplayValues(Calendar myCal, DateTime myDT) { Console.WriteLine(" Era: {0}", System.Convert.ToString(myCal.GetEra(myDT))); Console.WriteLine(" Year: {0}", System.Convert.ToString(myCal.GetYear(myDT))); Console.WriteLine(" Month: {0}", System.Convert.ToString(myCal.GetMonth(myDT))); Console.WriteLine(" DayOfYear: {0}", System.Convert.ToString(myCal.GetDayOfYear(myDT))); Console.WriteLine(" DayOfMonth: {0}", System.Convert.ToString(myCal.GetDayOfMonth(myDT))); Console.WriteLine(" DayOfWeek: {0}", System.Convert.ToString(myCal.GetDayOfWeek(myDT))); Console.WriteLine(" Hour: {0}", System.Convert.ToString(myCal.GetHour(myDT))); Console.WriteLine(" Minute: {0}", System.Convert.ToString(myCal.GetMinute(myDT))); Console.WriteLine(" Second: {0}", System.Convert.ToString(myCal.GetSecond(myDT))); Console.WriteLine(" Milliseconds: {0}", System.Convert.ToString(myCal.GetMilliseconds(myDT))); Console.WriteLine(); } //DisplayValues } //SamplesCalendar /* This code produces the following output. April 3, 2002 of the Gregorian calendar: Era: 1 Year: 2002 Month: 4 DayOfYear: 93 DayOfMonth: 3 DayOfWeek: Wednesday Hour: 0 Minute: 0 Second: 0 Milliseconds: 0 After adding 5 to each component of the DateTime: Era: 1 Year: 2007 Month: 10 DayOfYear: 286 DayOfMonth: 13 DayOfWeek: Saturday Hour: 5 Minute: 5 Second: 5 Milliseconds: 5 */

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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