Struct Interval

An interval between two instants in time (start and end).

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Implements

IEquatable<Interval>

IXmlSerializable

IEqualityOperators<Interval, Interval, bool>

Inherited Members

object.Equals(object, object)

object.GetType()

object.ReferenceEquals(object, object)

Namespace: NodaTime

Assembly: NodaTime.dll

Syntax

public readonly struct Interval : IEquatable<Interval>, IXmlSerializable, IEqualityOperators<Interval, Interval, bool>

Remarks

Equality is defined in a component-wise fashion: two intervals are considered equal if their start instants are equal to each other and their end instants are equal to each other. Ordering between intervals is not defined.

The interval includes the start instant and excludes the end instant. However, an interval may be missing its start or end, in which case the interval is deemed to be infinite in that direction.

The end may equal the start (resulting in an empty interval), but will not be before the start.

The default value of this type is an empty interval with a start and end of UnixEpoch.

Constructors

Interval(Instant, Instant)

Initializes a new instance of the Interval struct. The interval includes the start instant and excludes the end instant. The end may equal the start (resulting in an empty interval), but must not be before the start.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public Interval(Instant start, Instant end)

Parameters

Type	Name	Description
Instant	start	The start Instant.
Instant	end	The end Instant.

Sample snippet

using NodaTime;
using System;

Instant start = Instant.FromUtc(2019, 1, 1, 15, 25, 48);
Instant end = Instant.FromUtc(2019, 1, 1, 16, 25, 48);
Interval interval = new Interval(start, end);
Console.WriteLine(interval.Start);
Console.WriteLine(interval.End);

Output:

2019-01-01T15:25:48Z
2019-01-01T16:25:48Z

Exceptions

Type	Condition
ArgumentOutOfRangeException	end is earlier than start.

Interval(Instant?, Instant?)

Initializes a new instance of the Interval struct from two nullable Instant values.

Since 2.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public Interval(Instant? start, Instant? end)

Parameters

Type	Name	Description
Instant?	start	The start Instant or null.
Instant?	end	The end Instant or null.

Remarks

If the start is null, the interval is deemed to stretch to the start of time. If the end is null, the interval is deemed to stretch to the end of time.

Sample snippet

using NodaTime;
using System;

Instant end = Instant.FromUtc(2019, 1, 1, 16, 25, 48);
Interval interval = new Interval(null, end);
Console.WriteLine(interval.HasStart);
Console.WriteLine(interval.HasEnd);
Console.WriteLine(interval.End);

Output:

False
True
2019-01-01T16:25:48Z

Exceptions

Type	Condition
ArgumentOutOfRangeException	end is earlier than start, if they are both non-null.

Properties

Duration

Returns the duration of the interval.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public Duration Duration { get; }

Property Value

Type	Description
Duration	The duration of the interval.

Remarks

This will always be a non-negative duration, though it may be zero.

Sample snippet

using NodaTime;
using System;

Instant start = Instant.FromUtc(2019, 1, 1, 3, 10, 20);
Instant end = Instant.FromUtc(2019, 1, 1, 9, 10, 20);
Interval interval = new Interval(start, end);
var duration = interval.Duration;
Console.WriteLine(duration);

Output:

0:06:00:00

Exceptions

Type	Condition
InvalidOperationException	The interval extends to the start or end of time.

End

Gets the end instant - the exclusive upper bound of the interval.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public Instant End { get; }

Property Value

Type	Description
Instant	The end Instant.

Exceptions

Type	Condition
InvalidOperationException	The interval extends to the end of time.

See Also

HasEnd

HasEnd

Returns true if this interval has a fixed end point, or false if it extends to the end of time.

Since 2.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public bool HasEnd { get; }

Property Value

Type	Description
bool	true if this interval has a fixed end point, or false if it extends to the end of time.

HasStart

Returns true if this interval has a fixed start point, or false if it extends to the start of time.

Since 2.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public bool HasStart { get; }

Property Value

Type	Description
bool	true if this interval has a fixed start point, or false if it extends to the start of time.

Start

Gets the start instant - the inclusive lower bound of the interval.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public Instant Start { get; }

Property Value

Type	Description
Instant	The start Instant.

Remarks

This will never be later than End, though it may be equal to it.

Exceptions

Type	Condition
InvalidOperationException	The interval extends to the start of time.

See Also

HasStart

Methods

AddSchema(XmlSchemaSet)

Adds the XML schema type describing the structure of the Interval XML serialization to the given xmlSchemaSet.

Since 3.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public static XmlQualifiedName AddSchema(XmlSchemaSet xmlSchemaSet)

Parameters

Type	Name	Description
XmlSchemaSet	xmlSchemaSet	The XML schema set provided by XmlSchemaExporter.

Returns

Type	Description
XmlQualifiedName	The qualified name of the schema type that was added to the xmlSchemaSet.

Contains(Instant)

Returns whether or not this interval contains the given instant.

Since 1.2.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public bool Contains(Instant instant)

Parameters

Type	Name	Description
Instant	instant	Instant to test.

Returns

Type	Description
bool	True if this interval contains the given instant; false otherwise.

Sample snippet

using NodaTime;
using System;

Instant start = Instant.FromUtc(2019, 1, 1, 15, 25, 48);
Instant end = Instant.FromUtc(2019, 1, 1, 16, 25, 48);
Interval interval = new Interval(start, end);
Console.WriteLine(interval.Contains(Instant.FromUtc(2019, 1, 1, 15, 50, 50)));

Output:

True

Deconstruct(out Instant?, out Instant?)

Deconstruct this value into its components.

Since 2.3.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public void Deconstruct(out Instant? start, out Instant? end)

Parameters

Type	Name	Description
Instant?	start	The start of the interval.
Instant?	end	The end of the interval.

Sample snippet

using NodaTime;
using System;

Instant? start = Instant.FromUtc(2019, 1, 2, 3, 10, 11);
Instant? end = Instant.FromUtc(2020, 4, 5, 6, 12, 13);
Interval interval = new Interval(start, end);
interval.Deconstruct(out start, out end);
Console.WriteLine(start);
Console.WriteLine(end);

Output:

2019-01-02T03:10:11Z
2020-04-05T06:12:13Z

Equals(Interval)

Indicates whether the value of this interval is equal to the value of the specified interval. See the type documentation for a description of equality semantics.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public bool Equals(Interval other)

Parameters

Type	Name	Description
Interval	other	The value to compare with this instance.

Returns

Type	Description
bool	true if the value of this instant is equal to the value of the other parameter; otherwise, false.

Equals(object?)

Determines whether the specified object is equal to this instance. See the type documentation for a description of equality semantics.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public override bool Equals(object? obj)

Parameters

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

Returns

Type	Description
bool	true if the specified object is equal to this instance; otherwise, false.

Overrides

ValueType.Equals(object)

GetHashCode()

Returns the hash code for this instance. See the type documentation for a description of equality semantics.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public override int GetHashCode()

Returns

Type	Description
int	A 32-bit signed integer that is the hash code for this instance.

Overrides

ValueType.GetHashCode()

ToString()

Returns a string representation of this interval, in extended ISO-8601 format: the format is "start/end" where each instant uses a format of "uuuu'-'MM'-'dd'T'HH':'mm':'ss;FFFFFFFFF'Z'". If the start or end is infinite, the relevant part uses "StartOfTime" or "EndOfTime" to represent this.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

public override string ToString()

Returns

Type	Description
string	A string representation of this interval.

Overrides

ValueType.ToString()

Sample snippet

using NodaTime;
using System;

Instant start = Instant.FromUtc(2019, 1, 2, 10, 11, 12);
Instant end = Instant.FromUtc(2020, 2, 3, 12, 13, 14);
Interval interval = new Interval(start, end);
var stringRepresentation = interval.ToString();
Console.WriteLine(stringRepresentation);

Output:

2019-01-02T10:11:12Z/2020-02-03T12:13:14Z

Operators

operator ==(Interval, Interval)

Implements the operator ==. See the type documentation for a description of equality semantics.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

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

Parameters

Type	Name	Description
Interval	left	The left.
Interval	right	The right.

Returns

Type	Description
bool	The result of the operator.

operator !=(Interval, Interval)

Implements the operator !=. See the type documentation for a description of equality semantics.

Since 1.0.x

Availability net6.0, net8.0, netstandard2.0

Declaration

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

Parameters

Type	Name	Description
Interval	left	The left.
Interval	right	The right.

Returns

Type	Description
bool	The result of the operator.

Explicit Interface Implementations

IXmlSerializable.GetSchema()

This method is reserved and should not be used. When implementing the IXmlSerializable interface, you should return null (Nothing in Visual Basic) from this method, and instead, if specifying a custom schema is required, apply the XmlSchemaProviderAttribute to the class.

Since 3.2.x

Availability net6.0, net8.0, netstandard2.0

Declaration

XmlSchema IXmlSerializable.GetSchema()

Returns

Type	Description
XmlSchema	An XmlSchema that describes the XML representation of the object that is produced by the WriteXml(XmlWriter) method and consumed by the ReadXml(XmlReader) method.

IXmlSerializable.ReadXml(XmlReader)

Generates an object from its XML representation.

Since 1.2.x

Availability net6.0, net8.0, netstandard2.0

Declaration

void IXmlSerializable.ReadXml(XmlReader reader)

Parameters

Type	Name	Description
XmlReader	reader	The XmlReader stream from which the object is deserialized.

IXmlSerializable.WriteXml(XmlWriter)

Converts an object into its XML representation.

Since 1.2.x

Availability net6.0, net8.0, netstandard2.0

Declaration

void IXmlSerializable.WriteXml(XmlWriter writer)

Parameters

Type	Name	Description
XmlWriter	writer	The XmlWriter stream to which the object is serialized.

Implements

IEquatable<T>

IXmlSerializable

IEqualityOperators<TSelf, TOther, TResult>