)} ,System.Reactive.Concurrency.IScheduler)}

Observable.Start(Func) method¶

Defined in

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

Applies to

netstandard2.0

Overloads¶

1. public static IObservable<TResult> Start<TResult>(Func<TResult> function)
2. public static IObservable<TResult> Start<TResult>(Func<TResult> function, IScheduler scheduler)
3. public static IObservable<Unit> Start(Action action)
4. public static IObservable<Unit> Start(Action action, IScheduler scheduler)

public static IObservable<TResult> Start<TResult>(Func<TResult> function)

Summary: Invokes the specified function asynchronously, surfacing the result through an observable sequence.

Type parameters

Name	Description
`TResult`	The type of the result returned by the function.

Parameters

Name	Type	Description
`function`	Func	Function to run asynchronously.

Returns: IObservable -- An observable sequence exposing the function's result value, or an exception.

Remarks

The function is called immediately, not during the subscription of the resulting sequence.
Multiple subscriptions to the resulting sequence can observe the function's result.

Exceptions

Type	Condition
System.ArgumentNullException	`function` is null.

public static IObservable<TResult> Start<TResult>(Func<TResult> function, IScheduler scheduler)

Summary: Invokes the specified function asynchronously on the specified scheduler, surfacing the result through an observable sequence

Type parameters

Name	Description
`TResult`	The type of the result returned by the function.

Parameters

Name	Type	Description
`function`	Func	Function to run asynchronously.
`scheduler`	[IScheduler](#	Scheduler to run the function on.

Returns: IObservable -- An observable sequence exposing the function's result value, or an exception.

Remarks

The function is called immediately, not during the subscription of the resulting sequence.
Multiple subscriptions to the resulting sequence can observe the function's result.

Exceptions

Type	Condition
System.ArgumentNullException	`function` or `scheduler` is null.

public static IObservable<Unit> Start(Action action)

Summary: Invokes the action asynchronously, surfacing the result through an observable sequence.

Parameters

Name	Type	Description
`action`	Action	Action to run asynchronously.

Returns: IObservable -- An observable sequence exposing a Unit value upon completion of the action, or an exception.

Remarks

The action is called immediately, not during the subscription of the resulting sequence.
Multiple subscriptions to the resulting sequence can observe the action's outcome.

Exceptions

Type	Condition
System.ArgumentNullException	`action` is null.

public static IObservable<Unit> Start(Action action, IScheduler scheduler)

Summary: Invokes the action asynchronously on the specified scheduler, surfacing the result through an observable sequence.

Parameters

Name	Type	Description
`action`	Action	Action to run asynchronously.
`scheduler`	[IScheduler](#	Scheduler to run the action on.

Returns: IObservable -- An observable sequence exposing a Unit value upon completion of the action, or an exception.

Remarks

The action is called immediately, not during the subscription of the resulting sequence.
Multiple subscriptions to the resulting sequence can observe the action's outcome.

Exceptions

Type	Condition
System.ArgumentNullException	`action` or `scheduler` is null.