Článek
11/18/2011

DateTimeOffset.AddYears Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Adds a specified number of years to the DateTimeOffset object.

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

Syntax

'Declaration
Public Function AddYears ( _
    years As Integer _
) As DateTimeOffset

public DateTimeOffset AddYears(
    int years
)

Parameters

years
Type: System.Int32
A number of years. The number can be negative or positive.

Return Value

Type: System.DateTimeOffset
An object whose value is the sum of the date and time represented by the current DateTimeOffset object and the number of years represented by years.

Exceptions

Exception	Condition
ArgumentOutOfRangeException	The resulting DateTimeOffset value is less than MinValue. -or- The resulting DateTimeOffset value is greater than MaxValue.

ArgumentOutOfRangeException

The resulting DateTimeOffset value is less than MinValue.

-or-

The resulting DateTimeOffset value is greater than MaxValue.

Remarks

Unlike most of the other methods that add a single time interval unit (such as minutes or days) to a date and time value, AddYears does not enable you to add fractional parts of a year. To add a time that consists of other time units in addition to years to a DateTimeOffset object, use the Add method.

Note:
This method returns a new DateTimeOffset object. It does not modify the value of the current object by adding months to its date and time.

Examples

In the United States, driver's licenses cannot be issued to persons under 16 years of age. The following example displays the latest possible date on which a person must be born in order to legally be issued a driver's license.

Const minimumAge As Integer = 16
Dim dateToday As DateTimeOffset = DateTimeOffset.Now
Dim latestBirthday As DateTimeOffset = dateToday.AddYears(-1 * minimumAge)
outputBlock.Text += String.Format("To possess a driver's license, you must have been born on or before {0:d}.", _
                  latestBirthday) + vbCrLf

const int minimumAge = 16;
DateTimeOffset dateToday = DateTimeOffset.Now;
DateTimeOffset latestBirthday = dateToday.AddYears(-1 * minimumAge);
outputBlock.Text += String.Format("To possess a driver's license, you must have been born on or before {0:d}.",
                  latestBirthday) + "\n";

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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