Struct Offset

An offset from UTC in seconds. A positive value means that the local time is ahead of UTC (e.g. for Europe); a negative value means that the local time is behind UTC (e.g. for America).

Implements

IEquatable<Offset>

IComparable<Offset>

Inherited Members

Object.Equals(Object, Object)

Object.ReferenceEquals(Object, Object)

Object.GetType()

Namespace: NodaTime

Assembly: NodaTime.dll

Syntax

[Serializable]
public struct Offset : IEquatable<Offset>, IComparable<Offset>, IFormattable, IComparable, IXmlSerializable, ISerializable

Remarks

Offsets are always in the range of [-18, +18] hours. (Note that the ends are inclusive, so an offset of 18 hours can be represented, but an offset of 18 hours and one second cannot.) This allows all offsets within TZDB to be represented. The BCL DateTimeOffset type only allows offsets up to 14 hours, which means some historical data within TZDB could not be represented.

Offsets are represented with a granularity of one second. This allows all offsets within TZDB to be represented. It is possible that it could present issues to some other time zone data sources, but only in very rare historical cases (or fictional ones).

Fields

MaxValue

The maximum permitted offset; 18 hours after UTC.

Declaration

public static readonly Offset MaxValue

Field Value

Type	Description
Offset

Remarks

MinValue

The minimum permitted offset; 18 hours before UTC.

Declaration

public static readonly Offset MinValue

Field Value

Type	Description
Offset

Remarks

Zero

An offset of zero seconds - effectively the permanent offset for UTC.

Declaration

public static readonly Offset Zero

Field Value

Type	Description
Offset

Remarks

Properties

Milliseconds

Gets the number of milliseconds represented by this offset, which may be negative.

Declaration

public int Milliseconds { get; }

Property Value

Type	Description
Int32	The number of milliseconds represented by this offset, which may be negative.

Remarks

Offsets are only accurate to second precision; the number of seconds is simply multiplied by 1,000 to give the number of milliseconds.

Nanoseconds

Gets the number of nanoseconds represented by this offset, which may be negative.

Declaration

public long Nanoseconds { get; }

Property Value

Type	Description
Int64	The number of nanoseconds.

Remarks

Offsets are only accurate to second precision; the number of seconds is simply multiplied by 1,000,000,000 to give the number of nanoseconds.

Seconds

Gets the number of seconds represented by this offset, which may be negative.

Declaration

public int Seconds { get; }

Property Value

Type	Description
Int32	The number of seconds represented by this offset, which may be negative.

Remarks

Ticks

Gets the number of ticks represented by this offset, which may be negative.

Declaration

public long Ticks { get; }

Property Value

Type	Description
Int64	The number of ticks.

Remarks

Offsets are only accurate to second precision; the number of seconds is simply multiplied by 10,000,000 to give the number of ticks.

Methods

Add(Offset, Offset)

Adds one Offset to another. Friendly alternative to operator+().

Declaration

public static Offset Add(Offset left, Offset right)

Parameters

Type	Name	Description
Offset	left	The left hand side of the operator.
Offset	right	The right hand side of the operator.

Returns

Type	Description
Offset	A new Offset representing the sum of the given values.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.

CompareTo(Offset)

Compares the current object with another object of the same type.

Declaration

public int CompareTo(Offset other)

Parameters

Type	Name	Description
Offset	other	An object to compare with this object.

Returns

Type Description

Int32

A 32-bit signed integer that indicates the relative order of the objects being compared. The return value has the following meanings:

Value	Meaning
< 0	This object is less than the `other` parameter.
0	This object is equal to `other`.
> 0	This object is greater than `other`.

Remarks

Equals(Offset)

Indicates whether the current object is equal to another object of the same type.

Declaration

public bool Equals(Offset other)

Parameters

Type	Name	Description
Offset	other	An object to compare with this object.

Returns

Type	Description
Boolean	true if the current object is equal to the `other` parameter; otherwise, false.

Remarks

Equals(Object)

Determines whether the specified Object is equal to this instance.

Declaration

public override bool Equals(object obj)

Parameters

Type	Name	Description
Object	obj	The Object to compare with this instance.

Returns

Type	Description
Boolean	`true` if the specified Object is equal to this instance; otherwise, `false`.

Overrides

ValueType.Equals(Object)

Remarks

FromHours(Int32)

Returns an offset for the specified number of hours, which may be negative.

Declaration

public static Offset FromHours(int hours)

Parameters

Type	Name	Description
Int32	hours	The number of hours to represent in the new offset.

Returns

Type	Description
Offset	An offset representing the given value.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The specified number of hours is outside the range of [-18, +18].

FromHoursAndMinutes(Int32, Int32)

Returns an offset for the specified number of hours and minutes.

Declaration

public static Offset FromHoursAndMinutes(int hours, int minutes)

Parameters

Type	Name	Description
Int32	hours	The number of hours to represent in the new offset.
Int32	minutes	The number of minutes to represent in the new offset.

Returns

Type	Description
Offset	An offset representing the given value.

Remarks

The result simply takes the hours and minutes and converts each component into milliseconds separately. As a result, a negative offset should usually be obtained by making both arguments negative. For example, to obtain "three hours and ten minutes behind UTC" you might call Offset.FromHoursAndMinutes(-3, -10).

Exceptions

Type	Condition
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.

FromMilliseconds(Int32)

Returns an offset for the given milliseconds value, which may be negative.

Declaration

public static Offset FromMilliseconds(int milliseconds)

Parameters

Type	Name	Description
Int32	milliseconds	The int milliseconds value.

Returns

Type	Description
Offset	An offset representing the given number of milliseconds, to the (truncated) second.

Remarks

Offsets are only accurate to second precision; the given number of milliseconds is simply divided by 1,000 to give the number of seconds - any remainder is truncated.

Exceptions

Type	Condition
ArgumentOutOfRangeException	The specified number of milliseconds is outside the range of [-18, +18] hours.

FromNanoseconds(Int64)

Returns an offset for the given number of nanoseconds, which may be negative.

Declaration

public static Offset FromNanoseconds(long nanoseconds)

Parameters

Type	Name	Description
Int64	nanoseconds	The number of nanoseconds specifying the length of the new offset.

Returns

Type	Description
Offset	An offset representing the given number of nanoseconds, to the (truncated) second.

Remarks

Offsets are only accurate to second precision; the given number of nanoseconds is simply divided by 1,000,000,000 to give the number of seconds - any remainder is truncated towards zero.

Exceptions

Type	Condition
ArgumentOutOfRangeException	The specified number of nanoseconds is outside the range of [-18, +18] hours.

FromSeconds(Int32)

Returns an offset for the given seconds value, which may be negative.

Declaration

public static Offset FromSeconds(int seconds)

Parameters

Type	Name	Description
Int32	seconds	The int seconds value.

Returns

Type	Description
Offset	An offset representing the given number of seconds.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The specified number of seconds is outside the range of [-18, +18] hours.

FromTicks(Int64)

Returns an offset for the given number of ticks, which may be negative.

Declaration

public static Offset FromTicks(long ticks)

Parameters

Type	Name	Description
Int64	ticks	The number of ticks specifying the length of the new offset.

Returns

Type	Description
Offset	An offset representing the given number of ticks, to the (truncated) second.

Remarks

Offsets are only accurate to second precision; the given number of ticks is simply divided by 10,000,000 to give the number of seconds - any remainder is truncated.

Exceptions

Type	Condition
ArgumentOutOfRangeException	The specified number of ticks is outside the range of [-18, +18] hours.

FromTimeSpan(TimeSpan)

Converts the given TimeSpan to an offset, with fractional seconds truncated.

Declaration

public static Offset FromTimeSpan(TimeSpan timeSpan)

Parameters

Type	Name	Description
TimeSpan	timeSpan	The timespan to convert

Returns

Type	Description
Offset	An offset for the same time as the given time span.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The given time span falls outside the range of +/- 18 hours.

GetHashCode()

Returns a hash code for this instance.

Declaration

public override int GetHashCode()

Returns

Type	Description
Int32	A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table.

Overrides

ValueType.GetHashCode()

Remarks

Max(Offset, Offset)

Returns the greater offset of the given two, i.e. the one which will give a later local time when added to an instant.

Declaration

public static Offset Max(Offset x, Offset y)

Parameters

Type	Name	Description
Offset	x	The first offset
Offset	y	The second offset

Returns

Type	Description
Offset	The greater offset of `x` and `y`.

Remarks

Min(Offset, Offset)

Returns the lower offset of the given two, i.e. the one which will give an earlier local time when added to an instant.

Declaration

public static Offset Min(Offset x, Offset y)

Parameters

Type	Name	Description
Offset	x	The first offset
Offset	y	The second offset

Returns

Type	Description
Offset	The lower offset of `x` and `y`.

Remarks

Minus(Offset)

Returns the result of subtracting another Offset from this one, for a fluent alternative to operator-().

Declaration

public Offset Minus(Offset other)

Parameters

Type	Name	Description
Offset	other	The offset to subtract

Returns

Type	Description
Offset	The result of subtracting the other offset from this one.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.

Negate(Offset)

Returns the negation of the specified offset. This is the method form of the unary minus operator.

Declaration

public static Offset Negate(Offset offset)

Parameters

Type	Name	Description
Offset	offset	The offset to negate.

Returns

Type	Description
Offset	The negation of the specified offset.

Remarks

Plus(Offset)

Returns the result of adding another Offset to this one, for a fluent alternative to operator+().

Declaration

public Offset Plus(Offset other)

Parameters

Type	Name	Description
Offset	other	The offset to add

Returns

Type	Description
Offset	The result of adding the other offset to this one.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.

Subtract(Offset, Offset)

Subtracts one Offset from another. Friendly alternative to operator-().

Declaration

public static Offset Subtract(Offset minuend, Offset subtrahend)

Parameters

Type	Name	Description
Offset	minuend	The left hand side of the operator.
Offset	subtrahend	The right hand side of the operator.

Returns

Type	Description
Offset	A new Offset representing the difference of the given values.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.

ToString()

Returns a String that represents this instance.

Declaration

public override string ToString()

Returns

Type	Description
String	The value of the current instance in the default format pattern ("g"), using the current thread's culture to obtain a format provider.

Overrides

ValueType.ToString()

Remarks

ToString(String, IFormatProvider)

Formats the value of the current instance using the specified pattern.

Declaration

public string ToString(string patternText, IFormatProvider formatProvider)

Parameters

Type	Name	Description
String	patternText	The String specifying the pattern to use, or null to use the default format pattern ("g").
IFormatProvider	formatProvider	The IFormatProvider to use when formatting the value, or null to use the current thread's culture to obtain a format provider.

Returns

Type	Description
String	A String containing the value of the current instance in the specified format.

Remarks

ToTimeSpan()

Converts this offset to a .NET standard TimeSpan value.

Declaration

public TimeSpan ToTimeSpan()

Returns

Type	Description
TimeSpan	An equivalent TimeSpan to this value.

Remarks

Operators

Addition(Offset, Offset)

Implements the operator + (addition).

Declaration

public static Offset operator +(Offset left, Offset right)

Parameters

Type	Name	Description
Offset	left	The left hand side of the operator.
Offset	right	The right hand side of the operator.

Returns

Type	Description
Offset	A new Offset representing the sum of the given values.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.

Equality(Offset, Offset)

Implements the operator == (equality).

Declaration

public static bool operator ==(Offset left, Offset right)

Parameters

Type	Name	Description
Offset	left	The left hand side of the operator.
Offset	right	The right hand side of the operator.

Returns

Type	Description
Boolean	`true` if values are equal to each other, otherwise `false`.

Remarks

GreaterThan(Offset, Offset)

Implements the operator > (greater than).

Declaration

public static bool operator>(Offset left, Offset right)

Parameters

Type	Name	Description
Offset	left	The left hand side of the operator.
Offset	right	The right hand side of the operator.

Returns

Type	Description
Boolean	`true` if the left value is greater than the right value, otherwise `false`.

Remarks

GreaterThanOrEqual(Offset, Offset)

Implements the operator >= (greater than or equal).

Declaration

public static bool operator >=(Offset left, Offset right)

Parameters

Type	Name	Description
Offset	left	The left hand side of the operator.
Offset	right	The right hand side of the operator.

Returns

Type	Description
Boolean	`true` if the left value is greater than or equal to the right value, otherwise `false`.

Remarks

Inequality(Offset, Offset)

Implements the operator != (inequality).

Declaration

public static bool operator !=(Offset left, Offset right)

Parameters

Type	Name	Description
Offset	left	The left hand side of the operator.
Offset	right	The right hand side of the operator.

Returns

Type	Description
Boolean	`true` if values are not equal to each other, otherwise `false`.

Remarks

LessThan(Offset, Offset)

Implements the operator < (less than).

Declaration

public static bool operator <(Offset left, Offset right)

Parameters

Type	Name	Description
Offset	left	The left hand side of the operator.
Offset	right	The right hand side of the operator.

Returns

Type	Description
Boolean	`true` if the left value is less than the right value, otherwise `false`.

Remarks

LessThanOrEqual(Offset, Offset)

Implements the operator <= (less than or equal).

Declaration

public static bool operator <=(Offset left, Offset right)

Parameters

Type	Name	Description
Offset	left	The left hand side of the operator.
Offset	right	The right hand side of the operator.

Returns

Type	Description
Boolean	`true` if the left value is less than or equal to the right value, otherwise `false`.

Remarks

Subtraction(Offset, Offset)

Implements the operator - (subtraction).

Declaration

public static Offset operator -(Offset minuend, Offset subtrahend)

Parameters

Type	Name	Description
Offset	minuend	The left hand side of the operator.
Offset	subtrahend	The right hand side of the operator.

Returns

Type	Description
Offset	A new Offset representing the difference of the given values.

Remarks

Exceptions

Type	Condition
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.
ArgumentOutOfRangeException	The result of the operation is outside the range of Offset.

UnaryNegation(Offset)

Implements the unary operator - (negation).

Declaration

public static Offset operator -(Offset offset)

Parameters

Type	Name	Description
Offset	offset	The offset to negate.

Returns

Type	Description
Offset	A new Offset instance with a negated value.

Remarks

UnaryPlus(Offset)

Implements the unary operator + .

Declaration

public static Offset operator +(Offset offset)

Parameters

Type	Name	Description
Offset	offset	The operand.

Returns

Type	Description
Offset	The same Offset instance

Remarks

There is no method form of this operator; the Plus(Offset) method is an instance method for addition, and is more useful than a method form of this would be.

Explicit Interface Implementations

IComparable.CompareTo(Object)

Implementation of CompareTo(Object) to compare two offsets.

Declaration

int IComparable.CompareTo(object obj)

Parameters

Type	Name	Description
Object	obj	The object to compare this value with.

Returns

Type	Description
Int32	The result of comparing this instant with another one; see CompareTo(Offset) for general details. If `obj` is null, this method returns a value greater than 0.

Remarks

This uses explicit interface implementation to avoid it being called accidentally. The generic implementation should usually be preferred.

Exceptions

Type	Condition
ArgumentException	`obj` is non-null but does not refer to an instance of Offset.

ISerializable.GetObjectData(SerializationInfo, StreamingContext)

Implementation of GetObjectData(SerializationInfo, StreamingContext).

Declaration

[SecurityCritical]
void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)

Parameters

Type	Name	Description
SerializationInfo	info	The SerializationInfo to populate with data.
StreamingContext	context	The destination for this serialization.

Remarks

Exceptions

Type	Condition
ArgumentNullException	info is null.

IXmlSerializable.GetSchema()

Declaration

XmlSchema IXmlSerializable.GetSchema()

Returns

Type	Description
XmlSchema

Remarks

IXmlSerializable.ReadXml(XmlReader)

Declaration

void IXmlSerializable.ReadXml(XmlReader reader)

Parameters

Type	Name	Description
XmlReader	reader

Remarks

Exceptions

Type	Condition
ArgumentNullException	reader is null.

IXmlSerializable.WriteXml(XmlWriter)

Declaration

void IXmlSerializable.WriteXml(XmlWriter writer)

Parameters

Type	Name	Description
XmlWriter	writer

Remarks

Exceptions

Type	Condition
ArgumentNullException	writer is null.

Implements

System.IEquatable<T>

System.IComparable<T>

System.IFormattable

System.IComparable

System.Xml.Serialization.IXmlSerializable

System.Runtime.Serialization.ISerializable