,System.Linq.Expressions.Expression{System.Func{--0,System.IObservable{--0}}})} ,System.Linq.Expressions.Expression{System.Func{--0,System.IObservable{--0}}},System.Reactive.Concurrency.IScheduler)}

) method¶

Defined in

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

Applies to

netstandard2.0

Overloads¶

1. public static IQbservable<TSource> Expand<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, IObservable<TSource>>> selector)
2. public static IQbservable<TSource> Expand<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, IObservable<TSource>>> selector, IScheduler scheduler)

1. Overload¶

Attributes: [Experimental]

public static IQbservable<TSource> Expand<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, IObservable<TSource>>> selector)

Summary: Expands an observable sequence by recursively invoking selector.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence and each of the recursively expanded sources obtained by running the selector function.

Parameters

Name	Type	Description
`source`	[IQbservable](#	Source sequence with the initial elements.
`selector`	Expression>>	Selector function to invoke for each produced element, resulting in another sequence to which the selector will be invoked recursively again.

Returns: IQbservable -- An observable sequence containing all the elements produced by the recursive expansion.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `selector` is null.

2. Overload¶

Attributes: [Experimental]

public static IQbservable<TSource> Expand<TSource>(this IQbservable<TSource> source, Expression<Func<TSource, IObservable<TSource>>> selector, IScheduler scheduler)

Summary: Expands an observable sequence by recursively invoking selector, using the specified scheduler to enumerate the queue of obtained sequences.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence and each of the recursively expanded sources obtained by running the selector function.

Parameters

Name	Type	Description
`source`	[IQbservable](#	Source sequence with the initial elements.
`selector`	Expression>>	Selector function to invoke for each produced element, resulting in another sequence to which the selector will be invoked recursively again.
`scheduler`	[IScheduler](#	Scheduler on which to perform the expansion by enumerating the internal queue of obtained sequences.

Returns: IQbservable -- An observable sequence containing all the elements produced by the recursive expansion.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `selector` or `scheduler` is null.