SignalAsyncReactiveExtensions.FromAsync(Func<CancellationToken, ValueTask>) method - ReactiveUI

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SignalAsyncReactiveExtensions.FromAsync(Func<CancellationToken, ValueTask>) method - ReactiveUI

reactiveui/ReactiveUI

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Type: SignalAsyncReactiveExtensions Namespace: ReactiveUI.Primitives.Async.Reactive Assembly: ReactiveUI.Primitives.Async.Reactive.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

public static IObservableAsync<Unit> FromAsync(Func<CancellationToken, ValueTask> factory)

Summary: Creates an asynchronous observable sequence that executes the specified factory function and signals completion when the operation finishes.

Parameters

Name	Type	Description
`factory`	Func	A function that performs the asynchronous operation. The function receives a cancellation token that can be used to cancel the operation.

Returns: IObservableAsync -- An observable sequence that emits a single value of Unit when the factory function completes, followed by a completion notification.

Remarks

The returned observable executes the factory function as a background job. The sequence emits Unit after the factory completes and then signals completion. Cancellation is supported via the provided token.

Exceptions

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