,System.Func{--0,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask{System.Boolean}})} ,System.Func{--0,System.Boolean})}

ObservableAsync.TakeWhile(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<T> TakeWhile<T>(this IObservableAsync<T> @this, Func<T, CancellationToken, ValueTask<bool>> predicate)
2. public static IObservableAsync<T> TakeWhile<T>(this IObservableAsync<T> @this, Func<T, bool> predicate)

1. Overload¶

public static IObservableAsync<T> TakeWhile<T>(this IObservableAsync<T> @this, Func<T, CancellationToken, ValueTask<bool>> predicate)

View source

Summary: Returns elements from the observable sequence as long as the specified asynchronous condition is true, then completes.

Type parameters

Name	Description
`T`	The type of elements in the source sequence.

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`predicate`	Func>	An asynchronous function to test each element for a condition. Receives the element and a cancellation token.

Returns: IObservableAsync -- An observable sequence that contains elements from the source sequence that satisfy the condition, completing as soon as the predicate returns false.

Exceptions

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

2. Overload¶

public static IObservableAsync<T> TakeWhile<T>(this IObservableAsync<T> @this, Func<T, bool> predicate)

View source

Summary: Returns elements from the observable sequence as long as the specified condition is true, then completes.

Type parameters

Name	Description
`T`	The type of elements in the source sequence.

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`predicate`	Func	A function to test each element for a condition.

Returns: IObservableAsync -- An observable sequence that contains elements from the source sequence that satisfy the condition, completing as soon as the predicate returns false.

Exceptions

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