TaiwanCalendar::AddMonths Method (DateTime, Int32)
Assembly: mscorlib (in mscorlib.dll)
Parameters
- time
-
Type:
System::DateTime
The DateTime to which to add months.
- months
-
Type:
System::Int32
The number of months to add.
Return Value
Type: System::DateTimeThe DateTime that results from adding the specified number of months to the specified DateTime.
| Exception | Condition |
|---|---|
| ArgumentException | The resulting DateTime is outside the supported range. |
| ArgumentOutOfRangeException | months is less than -120000. -or- months is greater than 120000. |
The day part of the resulting DateTime is affected if the resulting day is not a valid day in the resulting month of the resulting year. It is changed to the last valid day in the resulting month of the resulting year. The year part of the resulting DateTime is affected if the resulting month is outside the year of the specified DateTime. This implementation supports only the current era. Therefore, ArgumentException is thrown if the resulting year is outside the era of the specified DateTime. The time-of-day part of the resulting DateTime remains the same as the specified DateTime.
For example, if the specified month is October, which has 31 days, the specified day is the 31st day of that month, and the value of the months parameter is 6, the resulting year is one more than the specified year, the resulting month is April, and the resulting day is the 30th day, which is the last day in April.
If the value of the months parameter is negative, the resulting DateTime is earlier than the specified DateTime.
TheKind 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.
The following code example demonstrates the use of the AddMonths method.
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(); } int main() { // Sets a DateTime to April 3, 2002 of the Gregorian calendar. DateTime myDT = DateTime(2002,4,3,gcnew GregorianCalendar); // Creates an instance of the TaiwanCalendar. TaiwanCalendar^ myCal = gcnew TaiwanCalendar; // Displays the values of the DateTime. Console::WriteLine( "April 3, 2002 of the Gregorian calendar equals the following in the Taiwan calendar:" ); DisplayValues( myCal, myDT ); // Adds two years and ten months. myDT = myCal->AddYears( myDT, 2 ); myDT = myCal->AddMonths( myDT, 10 ); // Displays the values of the DateTime. Console::WriteLine( "After adding two years and ten months:" ); DisplayValues( myCal, myDT ); } /* This code produces the following output. April 3, 2002 of the Gregorian calendar equals the following in the Taiwan calendar: Era: 1 Year: 91 Month: 4 DayOfYear: 93 DayOfMonth: 3 DayOfWeek: Wednesday After adding two years and ten months: Era: 1 Year: 94 Month: 2 DayOfYear: 34 DayOfMonth: 3 DayOfWeek: Thursday */
Available since 10
.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0