Calendar.AddMilliseconds(DateTime, Double) Method
Definition
Important
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public:
virtual DateTime AddMilliseconds(DateTime time, double milliseconds);
public virtual DateTime AddMilliseconds (DateTime time, double milliseconds);
abstract member AddMilliseconds : DateTime * double -> DateTime
override this.AddMilliseconds : DateTime * double -> DateTime
Public Overridable Function AddMilliseconds (time As DateTime, milliseconds As Double) As DateTime
Parameters
- milliseconds
- Double
The number of milliseconds to add.
Returns
The DateTime that results from adding the specified number of milliseconds to the specified DateTime.
Exceptions
The resulting DateTime is outside the supported range of this calendar.
milliseconds
is outside the supported range of the DateTime return value.
Examples
The following code example demonstrates the members of the Calendar class.
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
*/
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
*/
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
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
End Class
'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
Remarks
The milliseconds
value is rounded to the nearest integer before it is added to the specified DateTime. If milliseconds
is negative, the resulting DateTime is earlier than the specified DateTime.
The day part of the resulting DateTime is affected if the resulting time is outside the day of the specified DateTime. The month part of the resulting DateTime is affected if the resulting day is outside the month of the specified DateTime. The year part of the resulting DateTime is affected if the resulting month is outside the year of the specified DateTime. The era part of the resulting DateTime is affected if the resulting year is outside the era of the specified DateTime.
The Kind property of the returned DateTime value always equals DateTimeKind.Unspecified. You can preserve the Kind property of the time
parameter by calling the DateTime.SpecifyKind method, as the following example shows.
returnTime = DateTime.SpecifyKind(cal.AddMilliseconds(time, milliseconds), time.Kind);
returnTime = DateTime.SpecifyKind(cal.AddMilliseconds(time, milliseconds), time.Kind)
Applies to
See also
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