}}})} }}},System.Boolean)}

) method¶

Defined in

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

Applies to

netstandard2.0

Overloads¶

1. public static IQbservable<TResult> DeferAsync<TResult>(this IQbservableProvider provider, Expression<Func<CancellationToken, Task<IObservable<TResult>>>> observableFactoryAsync)
2. public static IQbservable<TResult> DeferAsync<TResult>(this IQbservableProvider provider, Expression<Func<CancellationToken, Task<IObservable<TResult>>>> observableFactoryAsync, bool ignoreExceptionsAfterUnsubscribe)

1. Overload¶

public static IQbservable<TResult> DeferAsync<TResult>(this IQbservableProvider provider, Expression<Func<CancellationToken, Task<IObservable<TResult>>>> observableFactoryAsync)

Summary: Returns an observable sequence that starts the specified cancellable asynchronous factory function whenever a new observer subscribes. The CancellationToken passed to the asynchronous factory function is tied to the returned disposable subscription, allowing best-effort cancellation.

Type parameters

Name	Description
`TResult`	The type of the elements in the sequence returned by the factory function, and in the resulting sequence.

Parameters

Name	Type	Description
`provider`	[IQbservableProvider](#	Query provider used to construct the [IQbservable](# data source.
`observableFactoryAsync`	Expression>>>	Asynchronous factory function to start for each observer that subscribes to the resulting sequence.

Returns: IQbservable -- An observable sequence whose observers trigger the given asynchronous observable factory function to be started.

Remarks

When a subscription to the resulting sequence is disposed, the CancellationToken that was fed to the asynchronous observable factory function will be signaled.

Exceptions

Type	Condition
System.ArgumentNullException	`observableFactoryAsync` is null.

2. Overload¶

public static IQbservable<TResult> DeferAsync<TResult>(this IQbservableProvider provider, Expression<Func<CancellationToken, Task<IObservable<TResult>>>> observableFactoryAsync, bool ignoreExceptionsAfterUnsubscribe)