,System.IObservable{--1},System.Linq.Expressions.Expression}},System.Linq.Expressions.Expression{System.Func{--1,System.IObservable{--3}}},System.Linq.Expressions.Expression{System.Func{--0,--1,--4}})}

) method¶

Defined in

Type: Qbservable Namespace: System.Reactive.Linq Assembly: System.Reactive.dll

Applies to

netstandard2.0

public static IQbservable<TResult> Join<TLeft, TRight, TLeftDuration, TRightDuration, TResult>(this IQbservable<TLeft> left, IObservable<TRight> right, Expression<Func<TLeft, IObservable<TLeftDuration>>> leftDurationSelector, Expression<Func<TRight, IObservable<TRightDuration>>> rightDurationSelector, Expression<Func<TLeft, TRight, TResult>> resultSelector)

Summary: Correlates the elements of two sequences based on overlapping durations.

Type parameters

Name	Description
`TLeft`	The type of the elements in the left source sequence.
`TRight`	The type of the elements in the right source sequence.
`TLeftDuration`	The type of the elements in the duration sequence denoting the computed duration of each element in the left source sequence.
`TRightDuration`	The type of the elements in the duration sequence denoting the computed duration of each element in the right source sequence.
`TResult`	The type of the elements in the result sequence, obtained by invoking the result selector function for source elements with overlapping duration.

Parameters

Name	Type	Description
`left`	[IQbservable](#	The left observable sequence to join elements for.
`right`	IObservable	The right observable sequence to join elements for.
`leftDurationSelector`	Expression>>	A function to select the duration of each element of the left observable sequence, used to determine overlap.
`rightDurationSelector`	Expression>>	A function to select the duration of each element of the right observable sequence, used to determine overlap.
`resultSelector`	Expression>	A function invoked to compute a result element for any two overlapping elements of the left and right observable sequences.

Returns: IQbservable -- An observable sequence that contains result elements computed from source elements that have an overlapping duration.

Exceptions

Type	Condition
System.ArgumentNullException	`left` or `right` or `leftDurationSelector` or `rightDurationSelector` or `resultSelector` is null.