,System.Func{--0,ReactiveUI.Extensions.Async.IObservableAsync{--1}})} ,System.Func{--0,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask{ReactiveUI.Extensions.Async.IObservableAsync{--1}}})} ,System.Func{--0,ReactiveUI.Extensions.Async.IObservableAsync{--1}},System.Func{--0,--1,--2})}

ObservableAsync.SelectMany(IObservableAsync, Func>) method¶

Defined in

Type: ObservableAsync Namespace: ReactiveUI.Extensions.Async Assembly: ReactiveUI.Extensions.dll

Applies to

net10.0, net10.0-browserwasm1.0, net10.0-desktop1.0, net9.0, net9.0-browserwasm1.0, net9.0-desktop1.0, net8.0, net8.0-ios17.5, net8.0-maccatalyst17.5, net8.0-macos14.2, net8.0-macos14.5, net8.0-tvos17.2, netstandard2.1, net462, net481

Overloads¶

1. public static IObservableAsync<TResult> SelectMany<T, TResult>(this IObservableAsync<T> @this, Func<T, IObservableAsync<TResult>> selector)
2. public static IObservableAsync<TResult> SelectMany<T, TResult>(this IObservableAsync<T> @this, Func<T, CancellationToken, ValueTask<IObservableAsync<TResult>>> selector)
3. public static IObservableAsync<TResult> SelectMany<T, TCollection, TResult>(this IObservableAsync<T> @this, Func<T, IObservableAsync<TCollection>> collectionSelector, Func<T, TCollection, TResult> resultSelector)

1. Overload¶

public static IObservableAsync<TResult> SelectMany<T, TResult>(this IObservableAsync<T> @this, Func<T, IObservableAsync<TResult>> selector)

View source

Summary: Projects each element of the observable sequence to an asynchronous observable sequence and merges the resulting sequences into one observable sequence.

Type parameters

Name	Description
`T`	The type of the elements in the source sequence.
`TResult`	The type of the elements in the projected inner sequences.

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`selector`	Func>	A transform function to apply to each element; it returns an observable sequence for each element.

Returns: IObservableAsync -- An observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the source sequence and merging the results.

Exceptions

Type	Condition
System.ArgumentNullException	Thrown if `selector` is null.

2. Overload¶

public static IObservableAsync<TResult> SelectMany<T, TResult>(this IObservableAsync<T> @this, Func<T, CancellationToken, ValueTask<IObservableAsync<TResult>>> selector)

View source

Summary: Projects each element of the observable sequence to an asynchronous observable sequence using an asynchronous selector and merges the resulting sequences into one observable sequence.

Type parameters

Name	Description
`T`	The type of the elements in the source sequence.
`TResult`	The type of the elements in the projected inner sequences.

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`selector`	Func>>	An asynchronous transform function to apply to each element; it returns an observable sequence for each element.

Returns: IObservableAsync -- An observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the source sequence and merging the results.

Exceptions

Type	Condition
System.ArgumentNullException	Thrown if `selector` is null.

3. Overload¶

public static IObservableAsync<TResult> SelectMany<T, TCollection, TResult>(this IObservableAsync<T> @this, Func<T, IObservableAsync<TCollection>> collectionSelector, Func<T, TCollection, TResult> resultSelector)

View source

Summary: Projects each element of the observable sequence to an asynchronous observable sequence, merges the resulting sequences, and applies a result selector to each pair of source and inner element.

Type parameters

Name	Description
`T`	The type of the elements in the source sequence.
`TCollection`	The type of the elements in the intermediate inner sequences.
`TResult`	The type of the elements in the result sequence.

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`collectionSelector`	Func>	A transform function to apply to each element to produce an intermediate observable sequence.
`resultSelector`	Func	A transform function to apply to each pair of source element and collection element.

Returns: IObservableAsync -- An observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the source sequence, and then mapping each pair of source and collection element through the result selector.

Exceptions

Type	Condition
System.ArgumentNullException	Thrown if `collectionSelector` or `resultSelector` is null.