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UmAlQuraCalendar.ToFourDigitYear Method

Converts the specified year to a four-digit year by using the TwoDigitYearMax property to determine the appropriate century.

Namespace:  System.Globalization
Assembly:  mscorlib (in mscorlib.dll)

public override int ToFourDigitYear(
	int year
)

Parameters

year
Type: System.Int32
A 2-digit year from 0 through 99, or a 4-digit Um Al Qura calendar year from 1318 through 1450.

Return Value

Type: System.Int32
If the year parameter is a 2-digit year, the return value is the corresponding 4-digit year. If the year parameter is a 4-digit year, the return value is the unchanged year parameter.

ExceptionCondition
ArgumentOutOfRangeException

year is outside the range supported by this calendar.

The ToFourDigitYear method uses the year parameter, the TwoDigitYearMax property, and a year to calculate a 4-digit year. The century is determined by finding the sole occurrence of the 2-digit year parameter within that 100-year range. For example, if TwoDigitYearMax is set to 1429, the 100-year range is from 1330 through 1429. Therefore, a 2-digit value of 30 is interpreted as 1330, while a 2-digit value of 29 is interpreted as 1429.

If the TwoDigitYearMax property is the special value 99, the ToFourDigitYear method ignores the settings in the regional and language options in Control Panel and returns the year parameter unchanged.

ToFourDigitYear supports either a two-digit year or a four-digit year. Passing a two-digit year value (less than 100) causes the method to convert the value to a four-digit value according to the TwoDigitYearMax value representing the appropriate century. If the application supplies a four-digit year value that is within the supported calendar range to ToFourDigitYear, the method returns the actual input value. If the application supplies a four-digit value that is outside the supported calendar range, or if it supplies a negative value, the method throws an exception.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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